Humanoid supply chain

What a robot is actually made of

Three tiers of it: the component makers who sell to every assembler, the critical-minerals names they get confused with, and the magnet layer in between. Priced, fact-checked, and tested to see which of them actually move together.

Compiled 30 Sep 2026 Tracked 18 names, 3 tiers
Doc RW·3T Sheets 09 Venues Tokyo · Xetra · US Refresh daily 07:00 UTC
01 The parts, and who makes them

A humanoid is mostly gearboxes, motors and magnets. Read the table downwards and you go from the joint that moves to the dirt it is made of — each row naming the part, what it does, and who actually supplies it.

Actuator chain of a humanoid, drawn as an assembly schematic A stylised humanoid skeleton built from joint nodes and links. Six joints are called out to the tier-one suppliers that make them: strain wave gears at the shoulder, servo motors at the elbow, actuator modules at the wrist, an edge vision chip at the head, cycloidal reducers at the hip and integrated actuators at the knee. A band beneath the figure marks the magnet and rare-earth material that every joint above depends on. FIG. 01 — ACTUATOR CHAIN 20–40 GEARED JOINTS PER UNIT STRAIN WAVE GEAR HARMONIC DRIVE · 6324.T SERVO MOTOR + DRIVE YASKAWA · 6506.T ACTUATOR MODULE SCHAEFFLER · SHA0.DE EDGE VISION SOC AMBARELLA · AMBA CYCLOIDAL RV REDUCER NABTESCO · 6268.T INTEGRATED ACTUATOR NIDEC · 6594.T MATERIAL — SINTERED NdFeB · ≈1.3 KG PER UNIT
Six tier-one suppliers, located on the joints they sell into. Everything above the band is assembly; the band is the input.
Part What it does Who makes it Listing
JointStrain wave gear Zero-backlash gearbox for precision joints. Twenty to forty per humanoid. Harmonic Drive Systems 6324.T
JointCycloidal RV reducer Heavier gearing for legs and load-bearing axes. Nabtesco 6268.T
MotorServo motor & drive Turns the joint and holds it against load. Yaskawa Electric 6506.T
MotorIntegrated actuator Motor, gearbox and controller folded into one unit. Nidec 6594.T
JointActuator module & bearings Complete joint assemblies, motors and electronics built in-house. Schaeffler SHA0.DE
PerceptionEdge vision SoC On-robot sight, with no cloud round-trip. Ambarella AMBA
MaterialSintered NdFeB magnet The rotor magnet inside every motor above. TDK · Aichi Steel · MP Materials 6762.T · 5482.T · MP
MaterialRare earth feedstock Neodymium and praseodymium for the magnet; dysprosium and terbium to keep it working hot. MP Materials · USA Rare Earth · Lynas MP · USAR · LYSDY
The last two rows are shaded because they are inputs rather than parts — the magnet and the metal that goes into it. Nobody assembles a robot from them directly, which is the distinction tiers two and three exist to make.

Latest — 30 Sep 2026. Nidec’s board did on Tuesday evening what this page spent two runs declining to report: Kishida is out, Michio Kaida is in, and it is now a company disclosure rather than an aggregator’s. An extraordinary board meeting on 29 September accepted the resignation of representative director and president Mitsuya Kishida, 66, and appointed Michio Kaida, 70, First Senior Vice President and vice-chair of the corporate reform committee, as president and chief executive. The stated reason is the company’s own and worth quoting, because it is narrower than “dismissed over the accounting scandal”: in the course of correcting prior years’ results the board reviewed officer conduct and found that Kishida “had, on certain occasions, made statements or engaged in conduct in relation to financial reporting that could not necessarily be regarded as appropriate.” The claim audit’s thirtieth row, which marked the aggregated version of this Wrong yesterday, becomes Overtaken: the resolution claim was false when published, because Nidec’s 28 September statement said in terms that nothing had been decided; the name bolted onto it was right, because the appointment followed inside a day. What that does not license is treating the next unsourced claim as early rather than false. A claim that turns out true and a claim that was established are different things, and only one of them is publishable on the day.

And the tape took back a fifth of what the limit-down cost. Nidec closed +4.7% at ¥2,355, the largest single gain anywhere on this page in this run, on the CEO change and on a second report alongside it: Nikkei says Nidec is in final-stage talks to sell Nidec Components (founded in 1967 as Copal Electronics, wholly owned since 2014) to Carlyle for more than ¥100bn, about $636m. That one is a press report and not a disclosure, which is the same distinction that mattered on Monday and is worth keeping on a day the page is recording the other half of it as confirmed. The drawdown narrows from 23.5% to 19.9%. What has not arrived is the document. 30 September was the extended filing deadline for the annual securities report for the year to March 2026, and as of this compile no restated accounts and no final impairment figure have been verified from the company. The ¥1tn that took the stock limit-down is still a press number, against roughly ¥250bn of goodwill and fixed assets Nidec itself said was subject to impairment review and the ¥400bn it had previously warned of. Until the filing is read, the distance between ¥250bn and ¥1tn is the entire question and none of it is settled.

Tokyo rallied into quarter-end and five of the six went with it. The Nikkei closed +1.94% at 66,753.72, its best session since 7 September, on a weaker yen and last-day-of-quarter rebalancing rather than on data. Industrial output fell 1.7% month on month and retail sales slowed to +2.7% year on year. Nabtesco rose 2.6% to ¥4,919, its highest close since 17 August; Yaskawa 2.3% to ¥4,633, its highest since 7 September; TDK 2.1% to ¥2,981, its highest since 1 September. Harmonic Drive was the exception and barely, −0.5% to ¥6,420, ending a two-session advance with its drawdown a third of a point wider at 29.8%. Aichi Steel fell a second time, −1.3% to ¥3,040, its lowest close since 31 July, which is now more than the ¥75 dividend it went ex on Tuesday can account for. One note on the index figure, because this page normally corroborates it and cannot today: the two Tokyo-listed index ETFs ran ahead of the index, 1321.T +2.23% and 1330.T +2.45% against 1.94%, where on every recent session they have tracked it inside three basis points. On the last day of a quarter that is an ETF premium rather than an index revision, so they are not confirmation this run and the index figure is taken from the index.

Xetra and the US roll onto 29 September, and the minerals tier fell again on a day gold went up. Bullion rose 1.3% and the gold miners 1.3%, recovering about a third of Monday’s fall in the metal and a quarter of it in the equities, with silver +1.0%, oil −4.4%, the S&P −0.2% and the ten-year at 5.26%. REMX broke its run, +0.5% to $64.79, and every US minerals name on this page fell into it. MP fell 2.2% to $45.43, its lowest close since 3 August; USA Rare Earth 2.4% to $14.08, a fifth consecutive fall and its lowest since 29 July; Lynas 1.0% to $9.48, its lowest close since 6 January 2026; Novonix 0.7% to $2.67. A benchmark rising while its two largest US-listed rare-earth holdings fall two per cent is not a rare-earth session in either direction, and it is the second time this week the single names have travelled further than the fund. Perpetua fell 1.3% to $21.53 against gold miners +1.3%, which is worth stating precisely because that card’s argument is that this name tracks gold: on Tuesday it did not, and nothing the company published explains the difference. Ambarella added 0.1% to $68.73 against semiconductors up 1.2%, recovering none of Monday’s name-specific 5.5%. Schaeffler eased 0.9% to €6.40, its lowest close since 21 November 2025, taking the page’s widest drawdown to 46.6%. Compass Diversified fell 1.4% to $11.04. Novonix’s ASX primary held A$0.097 on 30 September, a twelfth consecutive close below the A$0.12 Yorkville floor and 19% under it, while Lynas’s Sydney line rose 1.4% to A$13.83 on that same session, a day ahead of its ADR. The correlations did not move for a second run: the window still ends at ISO week 39 and basket-to-REMX is 0.3581 on both bucketing methods.

And one claim to stop, on the two largest numbers of the session. Coverage of Nidec’s rebound has it “+6.2% to ¥2,389”. The close was ¥2,355, +4.67%; ¥2,389 sits between that and the day’s ¥2,398 high, so it is an intraday print published as a day’s move. The same session’s index figure has the same shape, a press account of the Nikkei at “+2.10%” against an actual +1.94%, with 2.10% landing between the 66,753.72 close and the 66,946.14 high. Both are wrong by roughly the distance from the close to the high, which is the signature and the reason the two belong in one row: the claim audit takes its thirty-second, and it is not the first Nikkei figure on this page to have been taken before the bell. A percentage move is a claim about a settlement. When it falls between a close and a high, it was read off the screen while the market was still open.

29 Sep 2026. Nidec fell a further 3.8% to ¥2,250 — ordinary trading this time, not a limit — Nikkei now reports that Kishida has decided to go, and the document that sizes the impairment is due tomorrow. The fall was ¥90 against a daily limit of ¥500 for a stock in the ¥2,000–3,000 band, so unlike Monday this is a cleared price rather than an unfilled order book, and it is the lowest close since 15 April 2026. Two things moved on the news strand and neither is a company disclosure. Nikkei reported on 29 September that president Mitsuya Kishida, 66, has decided to step down as chief executive and could submit his resignation as early as Tuesday — that is, today — attributing the decision to losses at the e-axle EV drive unit. And Nikkei's own impairment figure has firmed: on 28 September it put the write-down at more than ¥600bn, about $3.8bn, mainly on traction motor systems for electric vehicles, and said it could reach ¥1tn once the accounts are adjusted. That tightens rather than complicates the spread this page has been carrying, because Nikkei's number now sits between the other two: the third-party committee's ¥250bn of March, the only figure in a published document; Nikkei's “several hundred billion” of 15 September, now sharpened to more than ¥600bn; and Diamond's ¥1tn, which reads as the upper bound after adjustment rather than as the estimate. What has not arrived is anything from Nidec. A probe of its release feed for 29 September returns nothing, and the only company statement remains Monday's: it is “true that change in executive members and a large-amount impairment are being discussed,” but “none of them has been decided by the Company at this moment.” The annual securities report for the year ended March 2026, already extended once, is due 30 September — tomorrow. The columns move with the price and not the calendar: the drawdown widens from 20.4% to 23.5%, the twelve-month cell from −11.3% to −12.1%, the year to date from +9.8% to +5.5%.

Aichi Steel fell 3.9% and most of it is a dividend rather than a decision. At ¥3,080 it was the worst of the six Tokyo names and, taken at face value, the second-largest fall on the page this session. It went ex-dividend today: ¥75.00 a share, payable 26 November. On the ¥3,205 previous close that is 2.3 points of the 3.9%, so the actual repricing is about 1.6% — an unremarkable session for a magnet maker, and nothing was disclosed by the company. It is worth recording because two columns widen here on the ex-date and neither is a judgement about magnets: the off-high figure goes from 8.3% to 12.4% and the year to date from +9.7% to +5.4%, with roughly three-fifths of the price move being the distribution leaving the shares. This is the dividend cousin of the base-roll effect this page keeps flagging in Nidec's and Harmonic's twelve-month cells — a figure that moves because of a corporate action rather than a re-rating. Elsewhere Tokyo was quiet and mixed against a Nikkei down 0.60% to 65,481.27, with the two Tokyo-listed index ETFs corroborating the direction if not the size, 1321.T −0.16% and 1330.T −0.45%: Yaskawa +1.7% to ¥4,528, the best of the six, Harmonic Drive +0.8% to ¥6,450 — whose twelve-month cell gained eight points to +145.6% on a base that rolled down 2.4% — Nabtesco +0.3% to ¥4,794 and TDK −1.2% to ¥2,919.

Xetra and the US roll onto 28 September, and what took the minerals tier down was an oil price. Gold fell 3.9% in a session, its sharpest fall in this run, as Brent went back toward $106 after the White House rejected Iran's proposal to reopen the Strait of Hormuz, the ten-year Treasury yield climbed back above 5.2%, and futures markets moved to better than a 70% implied chance of an October Fed hike. That is an inflation-and-rates session, not a critical-minerals one, and it is the second time this month the whole tier has been repriced by something with no rare earth in it. Perpetua fell 7.1% to $21.82, the largest single fall anywhere on this page this run and its lowest close since 4 August, against gold miners −5.4% and bullion −3.9% — an ordinary amplification of the mining equities, with no antimony in it and no company disclosure, which is exactly the relationship that card exists to state. Its twelve-month column fell from +23.6% to +3.1%, twenty points on a seven-point session, because the year-ago base rolled onto 26 September 2025's $21.16, 11.4% above the $19.00 it replaced — the largest column move this run, and almost none of it price. MP went the other way for the same reason: −4.9% to $46.45, its lowest close since 3 August, yet its twelve-month cell improved from −36.7% to −32.3% on a base that rolled down 11.0% onto $68.63. USA Rare Earth fell 5.0% to $14.42, a fourth consecutive fall and its lowest close since 29 July, its year to date from +27.6% to +21.1%. Lynas fell 3.8% to $9.58, its lowest since 16 September, with the Sydney ordinary line following a session later, −0.9% to A$13.64. REMX fell 3.3% to $64.47 — a fourth consecutive fall and its lowest close since 6 November 2025, which is the most that fund has given back on this page. Two names outside the metals did their own thing: Ambarella fell 5.5% to $68.68 against SOXX −2.1% and SMH −1.1%, so roughly three times the sector and a name-specific leg that nothing the company published explains, taking its drawdown from 24.8% to 29.0%; and Schaeffler fell 2.6% to €6.46, its lowest close since 26 November 2025, widening the page's widest drawdown to 46.1%. Novonix was the one riser, +0.4% to $2.69, and its ASX primary added 1.0% to A$0.097 on 29 September — an eleventh consecutive close below the A$0.12 Yorkville floor, 19% under it. Compass Diversified eased 0.4% to $11.20. The correlations did not move: the basket-to-REMX figure is 0.36 on both bucketing methods, which agree to within 0.01 across all fourteen names.

And two claims to stop — one circulating, one this page's own. The first is the third-hand version of the Nidec story, and it is worth naming because it is what a reader searching today will be handed: aggregated coverage states as established fact that a board resolution to dismiss Kishida has passed, and names Michio Kaida as the incoming chief executive. Neither is established. Nidec's only statement contradicts the first in terms — executive changes are “being discussed,” and “none of them has been decided” — and Nikkei's 29 September report, which is the source for Kishida going, names no successor at all. Kaida exists and is a plausible internal candidate: he is Nidec's First Senior Vice President and Chief Technology Officer. That is precisely what makes the claim durable rather than obviously wrong — a real name bolted onto a decision nobody has announced, which will read as confirmed the moment an appointment is actually made. The claim audit takes its thirtieth row. The second is smaller and ours: the 28 September entry below called REMX's −0.4% to $66.66 “a fourth consecutive fall.” It was the third — 23, 24 and 25 September — because 22 September closed up 1.0% at $70.97, a figure this page reconstructed when the bar went missing and the vendor has since confirmed to the cent. Yesterday's session is the fourth. That is the thirty-first row and the seventh against this page, and the mechanism is the plainest one yet: a streak counted forward from memory instead of off the series it describes.

28 Sep 2026. Nidec closed limit-down, −17.6% to ¥2,340 — the largest single move this page has recorded in either direction — and the company has confirmed the substance of the report that caused it while confirming none of its numbers. The fall is exactly ¥500, which is the Tokyo Stock Exchange daily price limit for a stock in the ¥2,000–3,000 band, so this is a mechanical stop rather than a print: the stock touched ¥2,405 early, reached the limit before 10:45 JST and sat on it for the rest of the session on 28.0m shares, with the day’s low equal to its close. The cause is a Diamond Online report published that morning: that Nidec intends to book a retroactive impairment of roughly ¥1tn in the year ended March 2026 against the accounting misconduct, and that an emergency board meeting on 25 September resolved to dismiss president Mitsuya Kishida, with a successor possibly named as early as 29 September. Nidec responded during the session, and the wording is the part worth holding onto. It said it is a fact that it is considering executive changes and large-scale impairment processing — 役員変更及び大規模な減損処理について検討をしているのは事実 — but that nothing has been decided at this point, and that it will disclose promptly once anything is. That is a confirmation of the category and a refusal of the size, and the distinction matters because three impairment figures are now circulating from three different places. The third-party committee’s report, published in March, put the potential charge at about ¥250bn, centred on the automotive business — the only one of the three that sits in a published document. Nikkei reported several hundred billion yen on 15 September. Diamond’s ¥1tn is four times the committee’s number and would, as the coverage notes, wipe out roughly a decade of accumulated profit. This page carries ¥1tn as a press figure and not as a disclosed one, and the document that settles which of the three is right is due in two days: the annual securities report for the year ended March 2026, already extended once, with a 30 September deadline. What the session changes in the tables is large and entirely price-driven, which is a reversal of the pattern this page has spent a fortnight describing. Nidec’s drawdown goes from 3.4%, the tightest on the page by a wide margin, to 20.4%; its twelve-month column from +6.7% to −11.3%; its year to date from +33.2% to +9.8%. Not one of those moves came from a base rolling. Two cautions to keep attached to it. This is a governance and accounting event, not a demand event — nothing here says anything about motors going into robots — and a limit-down close is an unfilled order book, not a cleared price, so the ¥2,340 in the table is where trading stopped rather than where it settled.

Nothing else in Tokyo moved with it, which is the right shape for a single-name governance event. The Nikkei closed −0.73% at 65,877.62 — cross-checked against the two Tokyo-listed index ETFs, 1321.T −0.76% and 1330.T −0.74% — and the other five Tokyo names on this page sat inside a point of it: Harmonic Drive +1.6% to ¥6,400, its highest close since 17 August, Nabtesco −0.2% to ¥4,782, Yaskawa −0.6% to ¥4,453, TDK −0.8% to ¥2,955, Aichi Steel −0.6% to ¥3,205. A seventeen-point fall in one name against five names within a point of the index is about as clean a separation as this page gets. Xetra and the US advance one session to 25 September, and both were quiet. Schaeffler recovered 1.4% to €6.63, its second rise after the two-session −8.3% the claim audit now dates to the Jefferies note; the drawdown narrows to 44.7% and is still the widest on the tier. Ambarella rose 4.0% to $72.68, its highest close since 21 August. The minerals tier did almost nothing: MP −1.0% to $48.83, USA Rare Earth −1.3% to $15.18, Lynas +0.2% to $9.96, Perpetua +0.3% to $23.49 against gold miners up 0.6% and bullion up 0.4%, Novonix +1.5% to $2.68, and REMX −0.4% to $66.66, a fourth consecutive fall and its lowest close since 31 July. Novonix’s ASX primary closed A$0.096 on 28 September, a tenth consecutive session below the A$0.12 Yorkville floor. Two twelve-month columns moved several times their price change, both on the base: MP’s from −30.8% to −36.7% on a 1.0% session and USA Rare Earth’s from −7.7% to −16.6% on a 1.3% one, because the year-ago base rolled onto 25 September 2025 and jumped 8.3% and 9.2% respectively in a single step. Harmonic Drive’s went the other way for the same reason, +123.3% to +137.9%, on a base that rolled down 4.6%.

The obvious explanation for Ambarella’s 4% was ten days old, and checking its date is the only reason this page is not printing it as a cause. The session ran roughly three times the sector — SOXX +1.17%, SMH +1.01% against Ambarella’s +4.04% — so a name-specific leg is real and wants an explanation. The candidate is the Developer Zone expansion on Google Cloud: a cloud-hosted IDE, remote access to live silicon, agentic tooling on Gemini Enterprise, a ZEDEDA fleet integration and an Ultralytics YOLO collaboration for CVflow devices. It is genuinely on-thesis for this position. It is also dated 15 September 2026, 09:00 ET — seven sessions before the move, and long since in the tape. Aggregator write-ups published on 25 September describe it as having happened “in September 2026” without a day, which is the mechanism by which a ten-day-old release reappears as a same-day catalyst. Nothing was published by Ambarella on 24 or 25 September. So the read is unchanged from the 24 September session: sector beta plus a name-specific leg this page cannot source, and no robotics content in either. That check is the direct lesson of yesterday’s claim-audit row, run in the opposite direction — there a live catalyst was aged into irrelevance, here a stale one was nearly freshened into a cause.

And one against this page. The 23 September entry below recorded “Novonix 3.4% to $2.801”. The price and the “lowest since 9 September” are both right; the percentage is not. Novonix closed at $2.85 on 22 September — a figure this page itself published in the tier-two table that run, and one the vendor has since backfilled at exactly that after the 22 September US bar went missing for seven tickers — so the session was −1.7%, not −3.4%. The claim audit takes its twenty-ninth row and the sixth against itself. Unlike the other five it has no reconstructable mechanism, which is its own finding: −3.4% implies a base of about $2.90, and no close anywhere in the series is $2.90.

27 Sep 2026. The widest drawdown on this page was blamed on nothing for two days, and the catalyst was sitting one session away the whole time: Jefferies cut Schaeffler to €8.70 on 23 September, and this page dated that note to a week earlier. Nothing traded anywhere on this page over the weekend, so there are no new closes, correlations or column moves below, and the news pass across all three tiers found no company disclosure since Friday — Nidec, MP, USA Rare Earth, Lynas, Perpetua, Novonix, Niron, TDK, Aichi and Compass all quiet. What the pass did turn up is an error of this page's own. On 25 September it described Schaeffler's −6.2% session as unexplained and added that “the only analyst action on the tape is a week old — Jefferies cutting its target to €8.70 while keeping a Buy.” Both halves cannot be true at once, and the dating is the part that is wrong. There were two Jefferies notes: 5 August, €10.45 to €9.45, and 23 September, €9.45 to €8.70. The page took the target from the September note and the age from the August one, and so retired as stale a catalyst that was one day old. Analyst Vanessa Jeffriess kept a Buy and wrote that Schaeffler's own reduction of its 2028 targets had damaged credibility — while calling the non-automotive robotics business the most attractive investment story in the sector, which is this page's thesis coming back in the mouth of the note that cut the target. Checked against the instrument, the sequence is clean: −2.24% to €6.97 on 23 September, the day of the note and the move contemporaneous German coverage attributes to it, then −6.17% to €6.54 on 24 September, then +1.38% to €6.63 on 25 September. Two sessions, −8.3%, €7.13 to €6.54. The second leg is still larger than a one-day-old target cut comfortably explains, so the caution this page kept was right in substance; but it had also assigned the 23 September fall to a dollar-led metals liquidation, which is a poor fit for a German bearing maker and is now superseded by a dated, named, corroborated cause. The claim audit takes its twenty-eighth row and the fifth against itself. The lesson is narrower than Friday's and worth separating from it: that one was a negative claim outliving its expiry, this one is a dismissal — a catalyst found, misdated, and filed away as too old to matter. Reaching for “a week old” from memory rather than reading the date off the note is how a live cause gets retired, and the check that would have caught it costs one click.

26 Sep 2026. A weekend news pass found the disclosure this page has spent three weeks saying did not exist: a shareholder is suing Nidec's founder for ¥28.7bn, and it was filed on 9 September. No market anywhere on this page traded on Saturday, so there are no new closes, correlations or column moves below — and the one thing that did change is a correction rather than a price. An individual shareholder instituted a derivative action in the Kyoto District Court (case 1749 of 2026) against two former directors, founder Shigenobu Nagamori and Hiroshi Kobe, demanding ¥28,730,558,300 plus delinquent charges under Article 462, paragraph 1 of the Companies Act. Nidec disclosed it on 10 September. The legal basis is the interesting part, because it is not the duty-of-care claim the August shareholder demands were pointing at: Article 462 is the capital-maintenance provision, and the suit says three specific capital returns — the treasury-share buybacks of September 2022 and February–March 2023, and the December 2022 midterm dividend — exceeded the distributable amount. That is the restatement arriving as a liability with a number on it. Restate those years downward and the distributable amount shrinks retroactively, which is what makes capital already paid out unlawful after the fact, so the filing due on 30 September — now four days away — is also the document that sizes this claim. Nidec says a suit against individuals will not affect its business performance, which is right about the P&L and beside the point about governance. Two things follow for this page. The claim audit takes a row against itself, its twenty-seventh and the fourth of its own. The interesting part is that “nothing disclosed since 4 September” was true when first written — it stopped being true on 10 September, and was then repeated for fifteen days after it expired. That is a different failure from getting a number wrong: a negative claim carries a silent expiry date, and every repetition of it is a fresh assertion about the disclosure record that has to be re-checked rather than inherited from the previous day's copy. And the argument built on it — that Nidec was being repriced on interpretation rather than information — survives, but by luck: the largest single gain anywhere on this page, +5.6% on 10 September, fell on the day the suit became public, and nothing in that session's tape suggests a ¥28.7bn claim against two individuals was what bid a ¥2,700 stock up five and a half points.

Finding 01

The thesis holds, the numbers don't

The picks-and-shovels logic is sound and the market-share claims check out. But three of the post's specific figures are wrong or stale — including a Yaskawa profit claim that inverts the actual result. Thirty-two claims checked so far.

Finding 02

You are buying after the move

Harmonic Drive is up 143% in a year and Yaskawa 47%, yet four of the six tier-one names still sit 29–47% below their 52-week highs. This is a sector that re-rated, sold off hard, and keeps clawing back what it gave — Harmonic reached its highest close since 17 August on 29 September before easing half a point. The widest gap still belongs to Schaeffler, at 46.6%, which is the widest it has been: the two-session 8.3% fall the claim audit dates to a Jefferies target cut has not been taken back at all. The exception has stopped being one: Nidec spent weeks as the tightest drawdown on the page, 3.4% off its high on an unrestated set of accounts, and two sessions took it to 23.5% off before Wednesday’s 4.7% bounce pulled it back to 19.9%. A narrow drawdown on a company whose accounts do not yet exist was never a measure of safety, and the filing deadline it had already had extended once has now passed with no restated accounts verified.

Finding 03

REMX is a moderate proxy at best

Two years of weekly returns, properly aligned by calendar week, put the robotics basket's correlation to REMX at 0.36 — real, but explaining about an eighth of the basket's weekly variance. On the same 30-day lookback the table uses, REMX is 16.3% lower while an equal-weighted robotics basket — the mean of the six names' own 1m cells — is 2.0% lower: a genuine shared input, still a different trade, and a gap now past fourteen points, widened by a base roll rather than by either side moving.

02 Tier one — the component layer
Company Layer Last 1d 1m YTD 1y vs 52w high 1y trend
Harmonic Drive Systems6324.T · ADR HSYDF Strain wave gears ¥6,420 −0.5% +10.9% +69.8% +142.5% −29.8%
Nabtesco6268.T · ADR NCTKY Cycloidal RV reducers ¥4,919 +2.6% +6.7% +31.2% +46.9% −19.5%
Yaskawa Electric6506.T · ADR YASKY Servo motors & controllers ¥4,633 +2.3% −3.1% −2.6% +46.8% −41.5%
Nidec6594.T · ADR NJDCY (stale) Motors & integrated actuators ¥2,355 +4.7% −8.8% +10.5% −10.6% −19.9%
SchaefflerSHA0.DE · ADR SFFLY Actuator modules & bearings €6.40 −0.9% −15.0% −23.4% +12.0% −46.6%
AmbarellaAMBA · Nasdaq Edge AI vision silicon $68.73 +0.1% −2.7% −3.0% −17.0% −28.9%
Prices in local listing currency at each venue’s last completed close, dated in the method note. Percentage moves are computed from that same local line, so they are clean of currency translation. ADR tickers are given for access, not for pricing — see the method note.
Joint 20–40 units per humanoid

Harmonic Drive Systems

6324.T

The closest thing to a monopoly on the list. Strain wave gears are the compact, zero-backlash gearboxes inside precision joints, and there is no substitute at volume. The ~85% share claim is consistent with how the market is generally described, and the humanoid order book is real but still small: roughly ¥2.5bn of humanoid-related orders guided for FY3/26, which management has suggested could double or triple in FY3/27.

The catch is that today's profit does not come from humanoids. FY3/26 landed at ¥59.6bn revenue (+7.0%) with operating profit down 94.4% year on year. The recovery is now visible, though: April–June revenue of ¥16.68bn (+23.6%) and operating profit of ¥1.84bn against ¥122m a year earlier, on consolidated orders of ¥24.13bn (+55.7%) — roughly ¥3bn of which was a one-off North American surgical-robot order. On 7 August the company lifted FY3/27 guidance to ¥74.5bn revenue and ¥8.5bn operating profit, from ¥68bn and ¥6.2bn. The stock is still priced on that forecast rather than on trailing numbers.

Share ~85% FY3/26 rev ¥59.6bn Q1 orders +55.7% FY3/27e op ¥8.5bn

WatchQuarterly humanoid order disclosure. This is the single number that justifies the multiple, and nothing has been published since the 7 August guidance upgrade, which is already priced. The tape has now run eleven sessions from the 4 September close of ¥5,730: +5.5%, +4.2%, −4.5%, +2.1%, +2.7%, −3.2%, +0.7%, +0.3%, +2.1%, 0.0%, then +3.9% to ¥6,200 on the Bank of Japan's rate decision. Tokyo then shut for three sessions, and the twelfth came on the reopen: +2.4% to ¥6,350 on 24 September, its highest close since 17 August and 10.8% above where the run started. The thirteenth ended it, and quietly: −0.8% to ¥6,300 on 25 September, on a session the Nikkei rose 1.30% — so the stock gave up two points of relative ground without a word from the company, having gained two or three the day before on the same silence. The fourteenth took it back and then some: +1.6% to ¥6,400 on 28 September, its highest close since 17 August, on a day the index fell 0.73% and the name two rows below it closed limit-down. None of the run came from the order book. Two figures in this row have moved a long way on the calendar rather than on the tape, and both need reading carefully. The month reads +12.2% against +0.2% a fortnight ago, because the 30-day base has rolled onto 28 August's ¥5,750, from the ¥5,960 of 18 August. And the twelve-month column fell from +116.9% to +95.9% on 18 September, because 18 September 2025's +15.0% day dropped out of the window — then jumped to +123.0% on 24 September, twenty-seven points on a 2.4% session, because a three-day holiday rolls the base six calendar days in one step, onto 24 September 2025's ¥2,847, ten per cent below the ¥3,165 it replaced. A fifteenth session added 0.8% to ¥6,450 on 29 September, a fresh high since 17 August on a day the index fell 0.60%, so a point and a half of relative gain on the same silence. The sixteenth gave a little of it back: −0.5% to ¥6,420 on 30 September, on a session the Nikkei rose 1.94% — two and a half points of relative ground surrendered, again with nothing published. Sixteen sessions, ¥5,730 to ¥6,420, and not one of them an order disclosure. The twelve-month column turned on its base for a fifth consecutive run and this time in the opposite direction: +142.5%, three points lower on a half-point session, because the year-ago base rolled up 0.8% onto 30 September 2025's ¥2,647 after four runs of rolling down. Read it against its own date rather than as news. The drawdown is the figure no base can flatter, and it widened a third of a point with the price to 29.8%, from the 29.5% that was the tightest of the run.

Joint Legs, load-bearing axes

Nabtesco

6268.T

The heavy-duty counterpart: cycloidal RV reducers for medium-to-large joints, with roughly 60% global share. Of the six, this is the one where the cited financials check out cleanly — FY2025 delivered ¥307.9bn revenue (+9.8%) and ¥20.7bn operating profit (+60.3%), with FY2026 guided to ¥327bn and ¥27.7bn.

Crucially, Nabtesco is committing capital ahead of the demand: it is doubling RV-reducer capacity into 2026 and bought Slovak cycloidal maker Spinea in 2023. That is a company acting on the thesis, not just narrating it.

Share ~60% FY25 rev ¥307.9bn Op profit +60.3% FY26e op +33.6%

WatchUtilisation of the doubled capacity. Idle new capacity turns a margin story into a fixed-cost problem quickly. It has been the most volatile name on the tier, and has now gone quiet: −5.7% on 2 September, then +1.6%, +1.4% and +3.6%, then −6.1% on 8 September and +4.5% on 9 September — and since then −0.7%, −1.3%, −0.3% and +0.2% — four sessions inside 1.5% after a fortnight of violent ones — before +2.6% to ¥4,551 on 16 September, its best session since 9 September, then +0.7% to ¥4,581 and +0.8% to ¥4,619 on 18 September — three gains running — and, after the three-day holiday, a fourth: +3.0% to ¥4,759 on 24 September, its best session since 9 September. A fifth followed, +0.7% to ¥4,792 on 25 September, then the streak broke at −0.2% and resumed at +0.3%, and then the largest session of the sequence arrived on the last day of the quarter: +2.6% to ¥4,919 on 30 September, its highest close since 17 August and its best session since 24 September, on an index up 1.94%, so for once the move is market rather than name, and the name still led it by seven tenths. Eight of the last ten sessions higher is the longest run this name has put together in the period this page has tracked, and none of it is company news. It sits 19.5% below its 52-week high, the tightest on the tier, and 6.7% higher over a month, where a fortnight ago that figure was 3.2% lower. Read that reversal the same way as Harmonic's: the 30-day base has rolled onto 31 August's ¥4,611, and nothing the company said moved either number.

Actuator Motor + gear + electronics

Schaeffler

SHA0.DE

The most concrete commercial traction on the list. Schaeffler signed a strategic partnership with Swiss Hexagon Robotics in April 2026 for strain wave and planetary gear actuators, and a separate technology and supply partnership with UK-based Humanoid. It is also a customer: it plans to deploy at least a thousand Hexagon robots across its own plants within seven years.

The in-house manufacturing point is fair — motors, power electronics and encoders are built internally. The offset is that Schaeffler remains predominantly an automotive supplier, so a humanoid win is diluted by a large, cyclical, structurally pressured base business. That mixed identity shows in the tape: down 23.4% YTD despite being up 12.0% over twelve months, and 46.6% below its high, the widest drawdown anywhere on this page. The fortnight of going nowhere ended on Friday. Four sessions had sat inside nine cents — €7.34 on 7 September, €7.43 on 8 September, €7.40 on 9 September and €7.34 on 10 September — and then 11 September broke the range, −2.0% to €7.19, the lowest close since 2 September. Monday went further, −3.3% to €6.95, and Tuesday further again: −2.4% to €6.78, the lowest close since 20 March — nearly six months undone in three sessions. Wednesday halted it, +1.2% to €6.86, the only tier-one name to rise that session, and Thursday reversed harder, +3.1% to €7.07 — its best session since 2 September. That did not hold either: −2.0% to €6.93 on 18 September, then +0.9% to €6.99 on 21 September and +2.0% to €7.13 on 22 September, its best close in a week — before giving it back, −2.2% to €6.97 on 23 September, in the same dollar-led metals session that took the minerals tier down. Then 24 September broke the whole range: −6.2% to €6.54, its worst session since 31 July and its lowest close since 26 November 2025. The sector context does not cover it — the DAX fell 0.57% with autos the worst-performing corner, and the largest carmakers in that move fell 2.2–2.4% — and there was no company disclosure on the day. The shape argues against a single headline: no gap at the open, a slow grind from €6.84 to €6.75 by mid-morning, then an acceleration through the last ninety minutes on 1.33m shares, more than three times Monday's volume. What there was, and what this page missed for two days, is a sell-side catalyst one session old: Jefferies cut its target to €8.70 from €9.45 on 23 September, keeping a Buy, with analyst Vanessa Jeffriess writing that Schaeffler's reduction of its own 2028 targets had damaged credibility — while calling the non-automotive robotics business the most attractive investment story in the sector. That note is the documented cause of the −2.2% on 23 September, which this page had loosely hung on a dollar-led metals session a German auto-parts supplier has no business being in. It does not by itself carry a 6.2% second-day move, and no disclosure does, so the caution stands — but “a cause it cannot source” was too strong: the two sessions together are −8.3%, €7.13 to €6.54, and the first of them has a name on it. It never joined the mid-August drawdown, so for a fortnight it had nothing to give back; it has given back far more than that since, and the month now reads 15.0% lower where three weeks earlier this was the one tier-one name essentially flat on that measure. Two quiet sessions have extended it rather than ended it: −2.6% to €6.46 on 28 September and −0.9% to €6.40 on 29 September, the lowest close since 21 November 2025, with nothing published on either day. Note what it is not: a chip name. Schaeffler fell on the same session as the semiconductor selloff but for its own reasons, and at 0.59 to the robotics basket it is one of the two loosest fits on the tier, alongside Ambarella at 0.54 — the two names here that are really something else. Several of these closes were reconstructed from the closing auction print when the German daily feed swallowed the session, and the ledger keeps closing behind itself: the 7, 16, 21, 22 and 23 September bars have all filled at exactly €7.34, €6.86, €6.99, €7.13 and €6.97, the last of them a fifteenth reconstruction confirmed to the cent. 24 September is the new hole, and because it carries a 6.2% session rather than a quiet one it was closed on four routes rather than two: the 17:35 auction bar at €6.54 on 484,271 shares, previousClose and chartPreviousClose both reading the same, and an independent German quote service carrying the session at 6.540. See the method note.

One correction worth flagging, because it changes the read. Measured on the thin SFFLY ADR, Schaeffler's correlation to the robotics basket looks like 0.16 — essentially unrelated. Measured on the liquid Xetra line it is 0.59. The ADR was not tracking the company; it was tracking its own illiquidity. Schaeffler belongs firmly inside the robotics bloc — and at 0.45 it is also the tier-one name that moves most with REMX, which fits a supplier whose bill of materials is heavy in magnets and bearing steel.

Partners Hexagon, Humanoid Own deployment 1,000+ units YTD −23.4% Corr robotics 0.59

WatchWhether actuators are ever broken out as a reported segment. Until then the robotics revenue is invisible inside an auto-parts P&L.

Motor 6-axis integrated motion

Nidec

6594.T

The world's largest electric motor maker, building integrated humanoid motion units that fold motor, gearbox and controller together — FLEXWAVE strain-wave reducers, KINEX cycloidal gearboxes and planetary systems shown at Automate 2026. The scale argument is real: roughly ¥2.6 trillion in annual revenue (about $17bn, not $2.6tn as the post's garbled phrasing implies).

This is the one name carrying a governance problem rather than just an execution problem, and on 4 September 2026 one half of it was finally published. Nidec disclosed the Investigation Committee's report on the quality strand, received on 2 September and released once confidentiality review was complete, together with its recurrence-prevention measures. The committee, established in May 2026, found a series of quality-related failures: 4M change-rule violations, falsification and fabrication of testing and inspection results, work outside approved inspection and manufacturing conditions, the use and shipment of substandard and unauthorised items, and breaches of record preparation and management rules, arising from an “unhealthy state” of excessive cost-reduction pressure, inefficient risk monitoring and inadequate quality-assurance resourcing. The decisive line for holders is financial: Nidec's evaluation of the individual matters found no material impact on its consolidated financial statements. Remediation gives quality managers authority to suspend shipments, revises reporting lines, adds permanent complaint boxes, puts every executive and employee through quality-compliance training and starts continuous quality audits; disciplinary action is promised but nobody is named. The stock rose 5.7% on the day and a further 7.7% on the Monday after it, to ¥2,812, before losing 3.2% to ¥2,722 and a further 4.8% to ¥2,591 — giving the whole post-report rally back by Wednesday — then taking most of it straight back with +5.6% to ¥2,737 on 10 September, the largest single gain anywhere on this page, and easing 1.7% to ¥2,691 on 11 September, a further 1.3% to ¥2,655 on 14 September, then 0.5% to ¥2,642, +0.2% to ¥2,646 on 16 September, +2.9% to ¥2,724 on 17 September, and +4.8% to ¥2,856 on 18 September on the Bank of Japan's hike — the largest single gain anywhere on this page in this period, and its highest close since 4 June. The report landed on 4 September with the stock up 5.7% that session; of the ten sessions since, seven moved more than 1.3% in one direction or the other — +7.7%, −3.2%, −4.8%, +5.6%, −1.7%, −1.3%, −0.5%, +0.2%, +2.9% and +4.8% — with a three-session lull in the middle that lasted exactly as long as it took the market to find a new reason. That reading rested on an empty disclosure record, and the record is not empty. On 10 September — the same session the stock rose 5.6%, the largest single gain anywhere on this page — Nidec disclosed that a shareholder had begun a derivative action against two former directors the day before. This page's line that Nidec had disclosed nothing at all since 4 September was accurate when written and stopped being accurate on 10 September; it was repeated for fifteen days after that, and the claim audit now carries it. The narrower statement that survives is that nothing has been disclosed on the filing strand since 4 September, and that the moves since have come from interpretation rather than information — including on the day the suit became public, which the tape did not mark at all. Everything else is still open — though it is worth being precise about what "open" means, because this page previously was not. The separate third-party committee on the accounting irregularities has finished: appointed in September 2025, it delivered a mid-term report on 27 February 2026 and its final report on 17 April 2026. What outlasts the inquiry is its consequence. Nidec is still correcting accounts back to the year ended March 2022, has not closed FY3/26, and has repeatedly postponed results — including the April–June quarter, delayed again on 5 Aug 2026. A tariff strand runs alongside: additional customs duties from declaration errors were estimated in March 2026 at US$69.7m, about ¥11.14bn, including interest. The quality strand covers changes to materials, processes and designs made without customer approval, mishandled inspection data and mislabelled production locations, and on 5 August an individual shareholder formally requested that the company pursue liability against current and former directors. A second, larger request followed: on 20 August multiple shareholders jointly demanded the same action under Article 847 of the Companies Act, disclosed the next day. Those were demands that the company sue, and they concern the quality and accounting conduct. What was filed on 9 September is a different instrument and the first claim in this saga that carries a number: an individual shareholder sued two former directors — founder Shigenobu Nagamori and Hiroshi Kobe — in the Kyoto District Court (case 1749 of 2026) for ¥28,730,558,300 plus delinquent charges under Article 462, paragraph 1, the capital-maintenance provision rather than the duty-of-care one. The claim is that three specific capital returns exceeded the distributable amount: the treasury-share buybacks of September 2022 and February–March 2023, and the December 2022 midterm dividend. That is the restatement arriving as a liability instead of as an accounting entry, and it is the mechanism worth understanding — correct the accounts for those years downward and the distributable amount shrinks retroactively, which is what makes capital already paid out unlawful after the fact. Nidec says the action, being against individuals, will not affect its business performance. That is accurate about the P&L and beside the point about governance: the suit does not need to succeed to establish that the restatement has consequences with numbers attached, and ¥28.7bn is the first one. Nidec has an Executive Responsibility Investigation Committee, running since 13 March 2026, to decide whether directors, auditors and executive officers bear legal liability. The US ADR has barely traded since February, which is why the Tokyo line is the only usable quote.

Revenue ~¥2.6tn Accounts unrestated Quality report published 4 Sep Impairment under consideration 1y −10.6%

Watch30 September 2026, and it is now two days out, with the stock limit-down on a report of what the filing will contain. The quality strand is closed; the accounting strand is not, and it has a hard date on it. Nidec obtained approval on 30 June to extend the filing deadline for its annual securities report for the year ended March 2026 from 30 June to 30 September — so the restatement the company has been working through since September 2025 is either filed inside three days or the extension itself becomes the story. The April–June quarter behind it is still missing too. Until both are current, position sizing here remains a governance decision rather than a robotics one. A third strand is now live alongside them: the 9 September derivative action over the 2022–23 buybacks and dividend, which turns on what the restated distributable amount actually is — so the filing due on 30 September is also the document that sizes that claim. On the closed strand, the verified count is worth carrying: the 4 September report found 844 cases of quality misconduct over about a decade — mostly changes to materials and processes without customer approval, alongside falsified tests and country-of-origin mislabelling — and Nidec states no individual matter has a material impact on its financial statements. Press reporting that attaches a ¥250bn write-down to that report is conflating it with the accounting strand; the claim audit now carries this. A fourth strand opened on 28 September and it is the loudest: Diamond Online reported that morning that the retroactive impairment will be roughly ¥1tn in the year ended March 2026, and that an emergency board on 25 September resolved to dismiss president Mitsuya Kishida. Nidec confirmed that executive changes and large-scale impairment processing are under consideration and that nothing has been decided, which leaves three impairment figures in circulation from three sources — the third-party committee’s ~¥250bn in its March report, the only one in a published document; Nikkei’s several hundred billion on 15 September; and Diamond’s ¥1tn. The filing due on 30 September is what adjudicates between them, which is why the deadline now carries more than a compliance question. This page also has a standing observation to retire. Through this whole run Nidec showed the tightest drawdown on the page by a wide margin — 3.4% off a 52-week high of ¥2,941 as recently as 25 September — and this page kept noting that a stock trading that close to its high is not the same thing as a stock that has recovered, on a company whose accounts for the year ended March 2026 do not yet exist. One limit-down session settled it: −17.6% to ¥2,340, 20.4% off the high, and the twelve-month column through zero from +6.7% to −11.3%. Its twelve-month return, meanwhile, has changed sign twice inside a week, and neither move came from the company. Nidec rose 4% on 12 September 2025, and that session rolling into the comparison cut the twelve-month return from +7.5% to +2.1% on a 1.3% price move. This page then forecast the next crossing to the day — on 16 September the base became 16 September 2025’s ¥2,671, and a +0.2% session took the twelve-month number below zero, to −0.9%. One day later the base rolled again, to 17 September 2025’s ¥2,691, and a +2.9% price move put it back above zero at +1.2%. Two sign changes, two sessions, one of them driven purely by which day fell out of the window. The next session was the clean control case: the base did not move — ¥2,691 on both 17 and 18 September 2025 — so a +4.8% price move took the figure to +6.1% and nothing else did. Same column, three consecutive readings, two mechanisms. The holiday then supplied a fourth: the base rolled six calendar days at once, off ¥2,691 onto 24 September 2025's ¥2,642, so a falling session left the twelve-month figure higher, at +6.8%. It is the cleanest illustration on this page of a return figure that moves because the calendar did — and a warning about reading any twelve-month column on a date when the base is volatile. The 28 September reading is the control case for the whole sequence: the base moved by a single session, from ¥2,662.5 to ¥2,636.5, and the column fell eighteen points anyway. When the price does something like this, the calendar stops mattering. 29 September extended it on ordinary trading rather than a limit — −3.8% to ¥2,250, a fall of ¥90 against a ¥500 limit, and the lowest close since 15 April 2026 — taking the drawdown to 23.5% and the twelve-month cell to −12.1%. Then the disclosure record caught up with the news. At an extraordinary board meeting on 29 September Nidec accepted the resignation of president and chief executive Mitsuya Kishida and appointed Michio Kaida, First Senior Vice President and vice-chair of its reform committee, in his place, saying Kishida “had, on certain occasions, made statements or engaged in conduct in relation to financial reporting that could not necessarily be regarded as appropriate.” 30 September took the stock +4.7% to ¥2,355, its largest gain of this whole episode, on that plus a Nikkei report of final-stage talks to sell Nidec Components to Carlyle for more than ¥100bn: a press report, not a disclosure. The drawdown comes back to 19.9% and the twelve-month cell to −10.6%. What has not arrived is the document. The annual securities report for FY3/26 was due on 30 September, the deadline having already been extended once, and as of this compile no restated accounts and no final impairment figure have been verified from the company. That report is what settles whether the real number is the roughly ¥250bn Nidec itself put under impairment review or the ¥1tn the press has reported, and until it is read the stock is being priced on the difference.

Motor Servo + drive + control

Yaskawa Electric

6506.T

One of very few firms that can already supply precision motion at industrial scale, now pointed at humanoids: it acquired 100% of Tokyo Robotics, whose whole-body torque sensing and impedance control fill a genuine capability gap, and ships MOTOMAN Next with NVIDIA GPUs for autonomous control.

But the profit claim in the source post is backwards. For the fiscal year ended February 2026, revenue edged up while operating profit fell more than 5%, with pre-tax and net profit down harder. The growth is in the forecast — FY2/27 guidance of ¥580bn revenue (+7%) and ¥47bn net profit (+33%). Up 46.8% over twelve months but 41.5% below its high — second only to Schaeffler now — it is the clearest example here of a stock priced on guidance rather than results. Its year-to-date return turned negative on 1 September and kept going: a 4.4% fall on 8 September wiped out three modest up sessions, a 1.6% loss on 10 September took it below its April low, a further 3.0% on 11 September took it to ¥4,301, then two yen lower on 14 September and three yen lower again on 15 September — three consecutive closes at the weakest since 3 April, and the manner of them was the point: not a capitulation but a slow bleed of two and three yen a session while the rest of the tier drifted higher. That run ended on 16 September, +1.5% to ¥4,360, its first gain in five sessions — then lasted exactly one day, −1.4% to ¥4,299 on 17 September, before the rate decision took it +2.0% to ¥4,383 on 18 September, and the reopen after the three-day holiday added +2.8% to ¥4,507 on 24 September, its highest close since 7 September. Then it gave a little back, −0.6% to ¥4,480 on 25 September — and on that session the Nikkei rose 1.30%, so this was the widest relative loss of the six Tokyo names here, nearly two points behind the index. Then it turned: −0.6% to ¥4,453 on 28 September, +1.7% to ¥4,528 on 29 September, the best of the six that day, and +2.3% to ¥4,633 on 30 September, its highest close since 7 September, on an index up 1.94%. Those three sessions took the month from 9.5% lower to 3.1% lower and the year to date from −5.8% to −2.6%, with the drawdown in to 41.5%. Note what did not change: a bounce off the weakest closes since 3 April is not the first-half number, and the guidance it is priced on does not get tested until that arrives.

FY2/26 op −5% FY2/27e rev ¥580bn FY2/27e net +33% Off high −41.5%

WatchFirst-half progress against that +33% net profit guide. It is a forecast-driven multiple with a recent record of missing.

Perception On-robot vision, no cloud

Ambarella

AMBA

The only US-listed name and the only one with a clean, current, verifiable set of numbers. CV7 launched at CES on 5 January 2026 — an 8K edge AI vision SoC for multi-sensor perception across robotics, drones, industrial automation and automotive. Fiscal 2026 revenue was $390.7m, up 37.2%, with fiscal 2027 growth guided at 10–15%. Q2 FY2027, reported on 3 September, came in at $108.1m (+13.2%) with non-GAAP EPS of $0.18 — both a shade ahead of consensus — and Q3 guided to $115–124m.

The robotics pipeline is disclosed rather than implied: 15+ robotics design wins with lifetime revenue above $100m, and 30+ customers in the pipeline. The honest caveat is that robotics is still the smaller part of a business anchored in security cameras and automotive — and the deceleration from +37% to a guided 10–15% is the number bulls have to explain.

Nor did the follow-up. Fermi Wang appeared at Citi's Global TMT Conference on 9 September and was blunter there than on the call: robotics has “a couple design wins,” but the volume is not going to change the financial performance materially, and humanoids are, on his account, harder from a technology standpoint than a level-5 autonomous car. He also named the constraint that is not in the guidance — memory. Customers, he said, could not get allocation commitments from their memory suppliers even for November, which he called the biggest uncertainty and expected to run into 2027. For a fabless designer that is a customer-side supply problem, not a demand one, but it lands on the same revenue line.

The Q2 call moved the narrative without moving the disclosure. Fermi Wang said edge AI revenue “reached record levels” on balanced sequential growth in Auto and IoT and very strong growth from the 5nm CV75 and CV72 SoCs, and the company raised its five-year serviceable-market forecast for edge AI and physical AI, citing higher-value products and new distribution through Macnica and CapGemini. Margins went the other way: non-GAAP gross margin of 59.3% against 60.5% a year earlier, with the Q3 guide at 59–60%. Still a GAAP loss — $6.7m, or $0.15 a share — against $8.2m of non-GAAP net income, on $272.3m of cash.

FY26 rev $390.7m Growth +37.2% FY27e +10–15% Q2 FY27 rev $108.1m Design wins 15+

WatchRobotics revenue disclosed as its own line — and Q2 did not do it. “Physical AI” now appears in the serviceable-market framing, but there is still no robotics number to hold anyone to, so this name remains a narrative read rather than a volume read. Then the tape did something the disclosure did not explain. Ambarella rose 8.4% to $68.80 on 9 September, the largest single move on this page in weeks and its highest close since 31 August. The sequence is worth recording, because the obvious attribution is wrong: the stock opened flat at $63.07 against a $63.48 previous close, ran roughly 10% in the first thirty minutes to $70.28 by 10:00, then faded to $66.43 by 13:00 — before the Citi appearance began at 13:55 — and closed at $68.80 on heavy final-hour volume. The move was made in the opening half-hour, hours ahead of the only scheduled event of the day, and the stock actually fell through the appearance itself. It was not a sector move either: the semiconductor ETFs added 0.7% and 0.1%, and NXP, still the reported suitor, closed lower. No company announcement accompanied it — and a sixth of it came back the next session, −1.4% to $67.87 on 10 September, against a semiconductor index down 2.7%. On 11 September it did nothing at all, a single cent lower at $67.86, while the semiconductor index rose 1.8% — the one name on this page that joined neither the rare-earth selling nor the chip rebound. Then on 14 September the whole unexplained 9 September gain came back at once, −5.7% to $63.98, its worst session since 16 July and within fifty cents of the 8 September close it started from; 15 September then steadied it, +0.6% to $64.33 — before 16 September took it to $62.77, down 2.4%, its lowest close since 17 July. This time the attribution is easy and it is not about robots: public calls from several AI-lab executives for a slower pace of frontier development took the semiconductor complex down with them — SOXX −5.6%, Nvidia −3.4%, Broadcom −4.8%, AMD −4.4% — and Ambarella tracked the sector almost exactly. That is the useful fact about this position. On the way up, its 9 September move was idiosyncratic and unexplained; on the way down it was pure sector beta. That last session broke the pattern and was worth marking — the semiconductor index rose 0.6% on 16 September while Ambarella fell 2.4% — and then three sessions ran the other way just as hard: +6.6% to $66.91 on 17 September, the day after the Federal Reserve's first hike since 2023, −1.1% to $66.15 on 18 September, and +4.1% to $68.85 on 21 September with SOXX up 4.9% on AI optimism ahead of the 24 September state dinner — its highest close since 31 August. Three sessions, +9.7%, and again not a word from the company. It gave most of that back at once, −2.6% to $67.06 on 22 September, then steadied, +0.8% to $67.62 on 23 September — the only name on this page to rise on a session that took the whole minerals tier down — then added +3.3% to $69.86 on 24 September, and then +4.0% to $72.68 on 25 September, its highest close since 21 August. Neither had a company announcement attached, and the second is worth one line of method: the obvious candidate — the Developer Zone expansion on Google Cloud, with the Gemini Enterprise tooling, the ZEDEDA fleet integration and the Ultralytics YOLO collaboration — is dated 15 September 2026, seven sessions earlier, and aggregator write-ups published on the 25th that place it vaguely “in September” are how a stale release gets re-read as a same-day cause. The sector took about a quarter of it, SOXX +1.2%. Which settles the read on this position: down it was sector beta, up it is sector beta, and the robotics line inside it is doing none of the work in either direction. The next session took all of that back and then some. On 28 September Ambarella fell 5.5% to $68.68 against SOXX −2.1% and SMH −1.1% — again roughly three times the sector, again with nothing published by the company, and this time in the opposite direction, which is the cleanest possible confirmation of the read above: whatever is moving this position is not the robotics line and is not company news. 29 September then did nothing at all with it, +0.1% to $68.73 against a semiconductor complex up 1.2%, so the name-specific leg was neither extended nor taken back. That leaves Ambarella 2.7% lower over a month and 28.9% off its high, with a twelve-month column that fell seven and a half points on the 22 September session purely because the year-ago base rolled onto a +7.1% day, recovered to −12.9%, and now reads −17.0%. It remains the only tier-one name whose drawdown is set by the AI trade rather than by industrial demand. Ambarella is still the name closest to breaking robotics out, which would make it the cleanest read on real humanoid volume anywhere on this list — the next chance is Q3, in December.

03 Claim audit — the posts, and the coverage
Checks out

Nabtesco operating profit rose 60% year over year

Correct. FY2025 operating profit +60.3% to ¥20.7bn on revenue of ¥307.9bn.

Checks out

Ambarella's CV7 launched at CES 2026 for on-robot perception

Correct. Announced 5 January 2026, an 8K edge AI vision SoC explicitly targeting robotics and industrial automation.

Checks out

MP Materials revenue jumped 89% to $108.5m

Correct and current. Q2 2026, reported 7 August — up from $57.4m, with NdPr output +41% and adjusted EBITDA turning positive.

Half right

Schaeffler is signing partnerships with multiple humanoid makers

True — Hexagon Robotics and Humanoid, both confirmed. But the ticker given, SFHLF, is SAF-Holland, a truck-parts supplier. Schaeffler is SHA0.DE or ADR SFFLY. Buying the quoted ticker buys the wrong company.

Half right

Nidec has ¥2.6 trillion in annual revenue and the scale to dominate

The revenue figure is right (the post's "$2.6 trillion yen" is a units error — it is ~$17bn). Omitted: an accounting investigation opened in September 2025 whose final report landed on 17 April 2026 and whose restatements are still not filed, results delayed again on 5 August 2026, a separate quality-misconduct investigation whose report was published on 4 September 2026 and which found falsified test results and shipments of unauthorised items across multiple bases (though no material financial impact), a shareholder demand on 5 August that directors be pursued for liability, and a second, joint demand from multiple shareholders on 20 August.

Stale

"Breaking: the Pentagon bought a $400,000,000 stake in America's only rare earth mine"

Real, but announced 10 July 2025 — thirteen months before the post. The DoD preferred-stock purchase plus warrant took it to ~15% of MP on an as-converted basis. It is not news, and it is already in the price.

Wrong

Yaskawa's operating profit rose roughly 70% in its most recent fiscal year

Inverted. For FY ended February 2026, operating profit fell more than 5%, with pre-tax and net profit down more. The ~70% figure resembles the forward net-profit guidance for FY2/27, not a delivered result.

Wrong

USA Rare Earth has commercial production expected by 2028

Out of date by two years on the plant, though this page over-corrected in the other direction and has now fixed it. USAR commissioned its Phase 1a magnet line at Stillwater in Q2 2026 and says it has commenced commercial production, guiding to 600 mtpa by end-Q4 2026 — so the 2028-style timeline belongs to the Round Top mine, not to the magnet plant, and the post conflates two separate assets. But commissioning is not selling: the company states it has “not commenced sales of neo magnets.” See the dedicated row below.

Overstated

Perpetua controls the only major domestic reserve of antimony

Stibnite is the largest known US antimony resource and is expected to cover ~35% of US demand in its first six years, so the thrust is fair. Omitted: it is predominantly a gold mine — ~4.8Moz reserves, ~450koz a year — and first production is 2029. Antimony goes into flame retardants and munitions, not magnets.

Out of date

Lynas is now building a US processing facility to fill the gap

It is not currently building one. On 16 March 2026 the US government redirected the US$96m allocated to the Seadrift, Texas heavy rare-earth plant into a four-year agreement to buy Lynas product instead. The genuine 2026 development is that Lynas became the first commercial producer of separated dysprosium and terbium outside China.

Wrong

"Trump just signed a 15% tariff on Chinese materials"

The 6 August 2026 Section 232 proclamation puts a 15% tariff on polysilicon and its derivatives — a solar and semiconductor input, with minimum import prices attached, effective December. It is not a rare-earth tariff and not a broad materials tariff. It has essentially no bearing on any of the five minerals names listed under it.

Not investable

Proterial listed among "publicly traded material & magnet producers"

Proterial has been private since October 2022, when a Bain Capital-led consortium completed a ~$7.5bn take-private of Hitachi Metals and the shares were delisted. Three of the six magnet names in that summary — Proterial, Niron and Noveon — cannot be bought at all, and a fourth, Arnold, only through its parent. Screening lists routinely mix public and private companies without flagging it.

Overtaken

"Ambarella beats Q2 EPS, revenue in line — shares edge higher" (3 Sep 2026)

The beat is right: $108.1m against $107.75m expected, non-GAAP EPS $0.18 against $0.17. The share-price half was written off the first post-market prints and did not survive the evening. Ambarella opened the extended session at $64.50, up 1.8% on a $63.38 close, then gave the whole move back to finish at $61.24 — down 3.4%. A second wire, filed later, ran the opposite headline. Neither is a forecast; they are the same session read at different minutes, and only one of them is still true. Reaction headlines pinned to a single early print are not evidence of how a print was received.

Overtaken

"Japan Stock Market Today, September 8: Nikkei 225 gains 0.4% while Topix falls 0.6%"

A mid-session snapshot filed as the day's market report. The index was at 66,615 when the piece was written; it closed at 65,269.33, down 1.70% — so the headline has the day the wrong way round by more than two points. The article's own list of fallers was already arguing with it: Murata −4.8%, Taiyo Yuden −5.4%, Toyota −3.2%, Sony −2.7% against a supposedly rising index. It matters here because four of the six tier-one names price in Tokyo, and the index print is the tape their moves get read against. This is the second such figure this page has had to correct — the first was 19 August's widely repeated "Nikkei −2.64%" against an actual −3.16% — which is why index moves are checked against the index's own close and not against the coverage of it.

Context missing

"Trump's administration is cutting China out of the US materials supply chain"

Directionally real, but the operative deadline is 1 January 2027, when defence sourcing rules bar Chinese-origin NdFeB magnets, tungsten and tantalum across the supply chain. That is a defence-procurement rule, not a commercial-robotics one — a humanoid built for a warehouse is not covered.

Half right

“Rare earth stocks tumble on U.S.–China thaw hopes: USA Rare Earth sinks 4%, MP Materials drops 5%” (10 Sep 2026)

One fault stands; the other this page has had to withdraw. The figures are a mid-session snapshot filed as the day's move — the piece is stamped 12:41pm ET, and by the close USA Rare Earth was down 5.98% to $16.04 and MP 5.49% to $51.32. That half is still wrong. On the cause, this page overreached. It argued the driver was purely a rates event — August producer prices a tenth above forecast, a $6bn Treasury buyback under what dealers had positioned for, the ten-year at 4.94%, silver −5.3%, the gold miners −3.5% — and that a summit date fixed since 23 July could not be news on the day. The macro leg was real and is not in question. The next session settled the rest: on 11 September the whole complex reversed, the S&P up 0.86%, gold up 0.6% and the gold miners up 1.1%, and the rare-earth names fell again regardless — REMX −2.6%, USA Rare Earth −3.0%, MP −1.6%, Lynas −2.2%. A liquidation that has already reversed cannot explain a second day of selling. So there is a sector-specific leg, it outlived the macro one, and ruling the coverage's driver out altogether was wrong. What survives is the narrower lesson, and it cuts both ways: a mid-session print is not a close, and a same-day cause asserted without a same-day disclosure is inference rather than evidence — including when the inference is this page's own.

Overtaken

“Nikkei 225 Falls Today, September 14: Japanese Benchmark Drops 1.7%” (14 Sep 2026)

The third mid-session index print this page has had to correct, and the second from the same outlet. The Nikkei 225 closed at 63,492.99, down 0.81%. The 1.7% figure — and the “below 63,000” and “six-week low” framing attached to it — belongs to the opening half-hour: the index bottomed at 62,810.29 at 09:25 and then spent the whole afternoon between 63,300 and 63,600. The piece is stamped 10:04 IST, about two hours before the Tokyo close, and its own third paragraph contradicts the headline, putting the index “around 63,364 points, down approximately 1.01%”. A Reuters-sourced wrap the same day carried 62,979.17 and −1.61%, also a morning level. The close is corroborated twice over: the two Tokyo-listed Nikkei 225 ETFs, 1321.T and 1330.T, fell 0.59% and 0.69%, which no 1.6% index day produces. It matters more than the arithmetic: four of the six tier-one names price in Tokyo, and “flat against an index down 0.8%” is a different observation from “outperformed an index down 1.7% by a point”. Always in the same direction — the mid-session number is the more dramatic one, and it is the one that gets filed.

Wrong

“Nikkei 225 Today, September 15: Japan Stock Market Rises 0.4% Above 63,700 As Tech Stocks Rebound” (15 Sep 2026)

The fourth mid-session index print this page has had to correct, and the third from the same outlet — two of them on consecutive sessions. The Nikkei 225 closed at 63,484.10, down 8.89 points, −0.01%. Flat, not up 0.4%, and the direction is wrong as well as the size. The piece is stamped 09:55:02 IST, which is 13:25 in Tokyo, an hour and thirty-five minutes before the 15:00 close, and its body is explicit about what it is quoting: the index “stood at 63,735, up 242 points or 0.38%”. The index did trade there; it gave the whole gain back by the bell. The two Tokyo-listed Nikkei 225 ETFs settle it exactly as before — 1321.T closed −0.03% and 1330.T −0.12%, which no +0.4% index day produces. A second aggregator carried the same session as 63,850 and +0.56%, also a level from before the close. Four of these now, from three different filers, and the failure mode has never once varied: an intraday quote is published under a headline that describes the day. For a page where four of the six tier-one names price in Tokyo, the index a reader is handed decides whether “flat” counts as strength or weakness — and on 15 September the honest answer was that Tokyo did nothing at all.

Wrong

“Nabtesco announced the acquisition of Harmonic Drive Systems, strengthening its precision gear portfolio for humanoid robot actuators”

No such transaction exists, and the truth runs the other way. The two companies did integrate their strain-wave gear businesses into a US joint venture in 2006, and Nabtesco took Harmonic Drive to equity-method affiliate status in 2008 — but Nabtesco dissolved that relationship in 2021, removing Harmonic Drive from its equity-method affiliates and booking a valuation gain on the shares. Both remain separately listed in Tokyo today; 6324.T and 6268.T are the two largest positions on this page's tier one and they are not related parties. Neither company has filed anything resembling a merger, and the tape agrees: Harmonic Drive traded +0.3% on the day the claim was circulating, which is not what a takeover of a ¥500bn company looks like. The claim traces to a single market-research “forecast report” page, which carries a second invented event alongside it — a Yaskawa–Siemens tie-up to co-develop servo gear reducers, for which neither company has issued a release. Two fabricated corporate actions on one page is a source-quality signal, not a pair of unlucky errors. It matters here because the whole structure of tier one assumes these are independent suppliers: if the gear duopoly had consolidated, the diversification argument on this page would be wrong.

Misattributed

“Nidec faces potential write-downs amounting to ¥250bn ($1.6bn) as a result” of the quality investigation (Sept 2026)

The number is real; the attribution is not, and the two Nidec investigations are being welded together. Nidec's 4 September quality report states the opposite of this on its own terms: its evaluation of individual matters “revealed no issue with any material impact on the Company's consolidated and other financial statements.” The ¥250bn belongs to the separate accounting strand, where Nidec discloses it not as a write-down taken but as an amount subject to examination for possible additional impairment, mainly on automotive-related goodwill and fixed assets. The figure genuinely booked from that strand is a ¥160.7bn expected reduction in consolidated net assets. So a contingent exposure under review in one investigation is being reported as a realised write-down caused by the other. The confirmed count from the quality report is 844 cases over about a decade, mostly unapproved changes to materials and processes, with falsified tests and country-of-origin mislabelling among them. Both strands matter here — but one is a governance problem with a filing deadline, and the other is a ¥250bn question mark over the automotive book, and a reader who merges them gets the size of neither right.

Overstated

“USA Rare Earth began filling customer orders for sintered NdFeB magnets at Stillwater in Q2 2026” — a claim this page itself carried

Commissioned, yes. Selling, no — and the company says so twice. The Q2 10-Q filed 10 August 2026 states that the Stillwater facility “has recently been commissioned and has commenced commercial production; however, we have not begun generating revenue from sintered neodymium-iron-boron (‘NdFeB’) permanent magnets.” The risk-factor supplement filed on 15 September 2026 is blunter still: Stillwater and Blacksburg “are under development and are not yet completed, we have not commenced sales of neo magnets,” and “we have not realized any revenues to date from the sale of neo magnets, critical minerals or rare earth minerals.” The quarter's $5.8m of revenue, which reads on this page and elsewhere as evidence of magnet sales, is nothing of the kind: the 10-Q attributes it “all” to Less Common Metals, the Cheshire subsidiary acquired in November 2025, and its own disaggregation note says every dollar of company revenue “is derived from sales of casting and strip casting” — booked at a gross loss of $1.6m. So the correct statement is narrow: a magnet line exists, is commissioned and is producing; no magnet has been sold, and the 600 mtpa figure is guidance for end-Q4 2026 rather than an achieved run-rate. This page had the stronger version in three places and has corrected all of them. It matters because USAR is one of only two names here that make finished magnets, and the entire tier-two case rests on whether ex-China magnet tonnage is arriving or merely announced.

Context missing

“The robotics basket's correlation to REMX is 0.41” — this page, through 16 September 2026

The figure was real but under-specified, and under-specified is not reproducible. On the stated window — 104 ISO-week-aligned weekly returns to the week ended 11 September 2026, primary listings throughout — an equal-weighted basket rebalanced weekly, meaning the mean of the six names' weekly returns, gives 0.3889. The same six names held without rebalancing give 0.4068. Both bucketing methods agree to four decimal places on each, so this is not a data problem; it is two different definitions of “equal-weighted basket,” and the page never said which it meant. The ambiguity surfaced because the published figure could not be rebuilt from the method note: swept across window lengths from 100 to 106 returns and end weeks 36 to 38, the rebalanced construction stays inside 0.363–0.398 and never reaches 0.41. A third check found a related slip — a two-year daily request yields at most 103 weekly returns, not the 104 this page claimed, so the window now comes from a three-year request. The page publishes the weekly-rebalanced figure, 0.39, and names the construction. No conclusion changes at either value; what changes is that a reader can now reproduce it.

Wrong

“Japan’s JP225 rose to 65,665 points on 24 September 2026, gaining 0.99%”

That is a late-session print, not a close, and the distinction cost roughly a quarter of the day’s reported gain. The Nikkei 225 closed 65,513.99 on 24 September, +0.76% and 495.04 points above 18 September’s 65,018.95 — verified two ways, from the daily bar whose quote metadata is stamped 15:45 JST, and from the five-minute series whose final print is 15:30 at the same 65,513.99 with previousClose at 65,018.95. The index was indeed near 65,650–65,680 at 15:10–15:25 and reached 66,249.11 intraday, +1.89%; the closing auction then took about 130 points out in the last five minutes. This is the second Nikkei figure to fail this check, after a press report of −2.64% on 19 August against an actual −3.16%, and the third instance on this page of a widely-quoted number turning out to be a continuous-trading print rather than a settlement. Check an index against the index, and check it at its close.

Context missing

“China rare earth magnet exports drop 21% before trade talks” (circulating 21–22 September 2026)

The 21% is real and the framing is not: it is US-bound shipments only. China exported 512 tonnes of rare-earth permanent magnets to the United States in August, down from 647 tonnes in July, on customs data released 20 September. China’s total magnet exports that month were 5,010 tonnes, down 6% month on month and 18% year on year. Dropping “to the US” turns a 6% decline into a 21% one and makes a bilateral licensing signal read as a collapse in global supply — a distinction that matters directly to tier two, because the US-bound figure is the one the scarcity thesis rests on and the global figure is the one magnet prices respond to. The underlying article states the scope correctly in its first sentence; the syndicated headline does not. The same piece dates the Trump–Xi meeting to 25 September, which is a day late: Xi’s state visit ran 23–25 September and the leaders met on the 24th.

Misattributed

“Critical Metals Surges 25% as Greenland Security Pact Puts Tanbreez Rare Earth Permit in Focus; USA Rare Earth Climbs 6%, MP Materials Rises 4%” (21 September 2026)

The session is real, the attribution is loose and the two figures are intraday prints. Trump announced on 18 September an agreement with Denmark and Greenland giving the United States “permanent control over security” on the island, and the rare-earth complex was bid when New York reopened on Monday. But USA Rare Earth owns nothing in Greenland: its assets are Round Top in West Texas, the Stillwater magnet line in Oklahoma, the Blacksburg site in South Carolina, Less Common Metals in Cheshire, a minority stake in Carester in France and Serra Verde in Goiás, Brazil. A security treaty over Greenland changes none of them, so a nine-per-cent move in USAR is sector momentum on a policy headline, not exposure being repriced — and treating it as the latter is the same error this page's whole tier-two section exists to refuse. The figures are wrong too, in the ordinary way: measured on closes, USAR rose 9.2% to $16.78 and MP 5.8% to $50.00, against the “6%” and “4%” in the headline. Those are prints taken while the session was still open, published as the day's move. This page prices the last completed close for exactly this reason.

Context missing

“Over the past four weeks REMX is 11.0% lower while the basket has fallen 5.2%” — this page, through 17 September 2026

The second number cannot be rebuilt, which makes it the same fault as the 0.41 correlation one row up, in a different column. On the figures that run published — Tokyo at 17 September, Xetra and the US at 16 September — an equal-weighted basket of the six tier-one names gives −8.4% on the 30-day lookback the table's 1m column uses, −4.2% on a 28-day lookback, −4.5% as a geometric mean of the same six ratios and −10.6% as a weekly-rebalanced four-week compound. None of them is 5.2%, and the REMX figure it was set against was computed on a 28-day lookback while the tables alongside it used 30 days. So two numbers presented as a comparison were measured over different windows, and one of them on no stated construction at all. The page now uses a single stated construction for it — the mean of the six names' own 1m cells, equal-weighted and unrebalanced, each on its own venue's 30-day lookback — which puts the basket at −1.0% against REMX's −13.0% on the same basis. The conclusion is unchanged and in fact strengthened; what changes is that both halves are now measured the same way and can be checked against the table.

Wrong

“Nidec has disclosed nothing at all since 4 September” — this page, accurate from 6 September, false from 10, repeated to 25 September 2026

True when written, false when repeated, and the thing it was missing was the most consequential disclosure on this name since the quality report. On 9 September 2026 a shareholder instituted a derivative action in the Kyoto District Court against two former directors, founder Shigenobu Nagamori and Hiroshi Kobe, demanding they pay the company ¥28,730,558,300 plus delinquent charges under Article 462, paragraph 1 of the Companies Act over the treasury-share buybacks of September 2022 and February–March 2023 and the December 2022 midterm dividend. Nidec disclosed it on 10 September, at which point this page's standing line stopped being accurate. It was nonetheless carried for another fifteen days, and an argument was built on it — that the stock was being repriced purely on interpretation because there was no new information — while the largest single gain anywhere on the page, +5.6% on 10 September, landed on the day the suit became public. The conclusion happens to survive, because a ¥28.7bn claim against two individuals is not what moved a ¥2,700 stock up 5.6% and nothing in the tape suggests it was read at all. But it survives by luck rather than by method: from 10 September the premise was false and was checkable on the company's own disclosure page. The lesson is specific to negative claims. “Nothing has been disclosed” is not a background condition that stays true until someone notices otherwise; it is an assertion about the record with a silent expiry date, and restating it on day fifteen is a new claim requiring the same check as on day one. This page audits press coverage for exactly this and had been reprinting its own unverified line while doing so.

Wrong

“The only analyst action on the tape is a week old — Jefferies cutting its target to €8.70 while keeping a Buy” — this page, on the Schaeffler session of 24 September, published 25 September 2026

Wrong on the date, and the date was the whole load-bearing part. Jefferies cut Schaeffler to €8.70 from €9.45 on 23 September 2026 — one session before the −6.2% move, not a week. The error has a clear mechanism: there were two notes from the same analyst, Vanessa Jeffriess, and this page merged them. On 5 August 2026 Jefferies went €10.45 to €9.45; on 23 September 2026 it went €9.45 to €8.70. The target quoted came from the September note, the age from the August one, and the two spliced together produced a catalyst that could be set aside as stale. It was not stale. The September note kept a Buy, said Schaeffler’s own reduction of its 2028 targets had damaged credibility, credited the company with self-help potential, and called the non-automotive robotics business the most attractive investment story in the sector. Against the Xetra line the sequence is unambiguous: −2.24% to €6.97 on 23 September, the session of the note, which contemporaneous German coverage headlined as the stock falling on the Jefferies cut; −6.17% to €6.54 on 24 September; +1.38% to €6.63 on 25 September. So two claims on this page need separating. The conclusion that no disclosure explains the 6.2% session survives — a one-day-old target cut does not ordinarily deliver its damage on the second day, and nothing else was published. But the 23 September fall, which this page attributed to the dollar-led metals liquidation that took the minerals tier down, is far better explained by the note: a German bearing and auto-parts supplier is not a rare-earth proxy, and that attribution was co-timing dressed as cause. The failure mode is worth naming separately from the Nidec row above. That one was a negative claim repeated past its expiry; this one is a dismissal — the relevant item was found, misdated, and discarded for being old. Both come from the same habit of inheriting a characterisation instead of re-reading the source, and on a page whose method note insists every figure be dated, an analyst note is a dated document like any other.

Wrong

“Novonix 3.4% to $2.801” — this page, on the session of 23 September, published 24 September 2026

The price is right, the comparison is not. Novonix closed at $2.85 on 22 September and $2.801 on 23 September, so the session was −1.7%. The adjacent figure in the same sentence, Lynas easing 2.6% to $10.06, checks out exactly, which is what makes this one worth recording rather than shrugging at — the arithmetic was being done correctly one clause earlier. Two corroborations put the base beyond doubt: this page's own tier-two table published $2.85 as Novonix's last close on the 23 September run, and the vendor, whose 22 September daily bar then went missing for four days across seven US tickers, has since backfilled that session at exactly $2.85. The rest of the claim survives — $2.801 was indeed the lowest close since 9 September's $2.74. What does not survive is any account of where −3.4% came from. It implies a prior close of about $2.90, and there is no $2.90 anywhere in the series: 18 September was $2.885, 21 September $2.84, 22 September $2.85. Every other row in this audit that concerns this page's own work names a mechanism — a merged pair of analyst notes, a negative claim past its expiry, a base rolled without noticing. This one has none, and that is the finding. A figure with a traceable bad method can be guarded against by fixing the method; a figure that matches no input at all can only be guarded against by recomputing every percentage from the two closes it sits between, which is now the rule for the prose as well as for the tables.

Overtaken

“A board resolution has been passed to dismiss President Mitsuya Kishida”, and Michio Kaida named as incoming CEO — aggregated coverage, 29 September 2026

Both halves have now happened, and the row stays because one of them was still false when it was published. Nidec’s only statement on the matter at the time, released 28 September 2026, said the opposite in terms: it was “true that change in executive members and a large-amount impairment are being discussed,” but “none of them has been decided by the Company at this moment.” Nikkei’s 29 September report, the source for Kishida going, named no successor at all. Kaida was a real and plausible internal candidate — First Senior Vice President, and vice-chair of the committee running the company’s reform programme — which is exactly what made the claim durable rather than obviously wrong. It was then confirmed on 29 September, when an extraordinary board meeting accepted Kishida’s resignation and appointed Kaida president and chief executive. So the aggregators were about a day early rather than inventing it, and that is the useful lesson rather than a vindication: a claim that turns out true was still not established when it was asserted, and nothing in the 29 September record distinguished it from the ones that do not land. One detail circulating with it is wrong on its own terms: Kaida is described in places as Nidec’s chief technology officer, and the company’s own release identifies him by the First Senior Vice President role and the reform committee, not that title.

Wrong

“REMX −0.4% to $66.66, a fourth consecutive fall” — this page, on the session of 25 September, published 28 September 2026

The price, the percentage and the “lowest close since 31 July” all check out; the streak does not. REMX fell on 23 September (−3.11% to $68.76), 24 September (−2.66% to $66.93) and 25 September (−0.40% to $66.66) — three sessions, not four. The session before them, 22 September, closed up 1.0% at $70.97, and that base is not in doubt from either direction: it is the figure this page reconstructed from previousClose when the 22 September US bar went missing across seven tickers, and the figure the vendor backfilled to the cent when the hole healed. So the error is not a data artefact and has no reconstructable mechanism beyond counting a streak forward from the previous run's copy rather than reading it off the series. It is corrected by the tape rather than by this page: 28 September's −3.3% to $64.47 is the fourth consecutive fall, and it is the lowest close since 6 November 2025. A run-length is a claim about a series, and like the negative-disclosure claim two rows up it has to be re-derived each time it is repeated rather than incremented.

Wrong

“Nidec surged 6.2% to ¥2,389” and “the Nikkei climbed 2.10%” — market coverage of the 30 September 2026 Tokyo session

Two figures, one mechanism. Nidec closed at ¥2,355 on 30 September, +4.67% on the ¥2,250 of the day before; the session high was ¥2,398. The Nikkei closed at 66,753.72, +1.94%, with a high of 66,946.14. Both quoted numbers sit between the close and the high of the instrument they describe, which is the signature of an intraday print carried into a report as the day’s move. Neither is a rounding difference: ¥2,389 is a level the stock traded at and did not settle at, and 2.10% resolves to about 66,856, likewise inside the range. Checked against the index and the stock themselves rather than against each other, because a wire figure and an aggregator figure repeating it are one source. This is not the first Nikkei percentage on this page to have been taken before the bell, and the check is the same every time: a move is a claim about a settlement, so price it off the close or do not price it.

04 The REMX Question (Rare Earth ETF)

Every humanoid needs roughly 1.3 kg of NdPr magnet material, and China makes about 90% of the world's rare-earth magnets. That is a real physical dependency. It does not follow that a rare-earth ETF is a way to own robotics — so I tested it rather than assuming it.

Correlation with REMX

Weekly return correlation, 104 weeks to 25 Sep 2026 (the last completed ISO week; the in-progress week is excluded), re-bucketed from daily closes into true ISO calendar weeks so Tokyo, Xetra and New York are matched to the same week — not Yahoo's native weekly bars, which anchor Tokyo/Xetra weeks about one week off from New York's.

Robotics component names Rare earth & critical minerals names

The two groups trade differently, but less starkly than this page showed before the 18 Aug alignment fix. Lynas, MP Materials and Perpetua move with REMX at 0.62, 0.54 and 0.51. The robotics names sit between 0.16 and 0.45 — every one of them, Nidec included, is a genuine positive correlation once Tokyo and Xetra weeks are properly aligned to REMX's calendar. A weekly-rebalanced equal-weighted robotics basket correlates to REMX at 0.36, not the 0.19 this page carried before the fix — and the basket definition is worth stating, because it moves the figure: held without rebalancing the same six names give 0.39, which is the construction this page published through 16 September without saying which one it meant. Both are defensible; only one was disclosed. See the method note and the claim audit.

Meanwhile those same robotics names correlate to the basket at 0.54–0.83. They still form a tighter bloc with each other than with REMX, which is a real but partial exposure, not a stand-in. The four-week columns have gone from level three weeks ago to a gap of more than fourteen points, a point and a half wider than last run: REMX 16.3% lower on the 30-day lookback the tables use, against 2.0% lower for an equal-weighted robotics basket — the mean of the six tier-one names' own 1m cells, which is the construction, stated, because this page published a basket four-week figure of 5.2% that cannot be rebuilt from any of them. Note how the gap widened: the basket barely moved, and REMX's own four-week number deteriorated by nearly two points on a session in which the fund rose, because its 30-day base rolled onto a higher late-August close. Before reading fourteen points as a divergence, read both bases — REMX's 30-day base is 28 August and the basket's Tokyo leg is based on 31 August, so both rolled forward again this run. What survives the base effects is the point this section keeps having to make: the two tiers arrive at four-week numbers by different routes — REMX through rare-earth-specific selling that ran six sessions and then reversed on a Greenland headline, the robotics names through a Tokyo drawdown the gearbox makers clawed back on a central-bank decision. A correlation of 0.36 permits exactly this. Equal four-week returns are not shared exposure, and unequal ones are not divergence; that is the error this whole section exists to refuse. Not one correlation figure moved this run, or last: the window ends at the last completed ISO week, which is still week 39, and the week in progress does not enter it until it closes. Two sessions of tape inside an open week change nothing here, which is worth saying because it is the opposite of the tables above.

Part of the reason is what REMX actually holds. Roughly 24% of the fund is in rare-earth companies and about 38% in lithium names — more lithium by weight than rare earths, as of April 2026. Top holdings run to MP Materials, Lithium Americas, Lynas, China Northern Rare Earth and Albemarle.

So a bet on REMX is substantially a bet on the lithium cycle and on Chinese miners, with roughly a third of the fund in Chinese companies. It is weighted to miners rather than to the separators and magnet makers a robot actually consumes.

What REMX is really tracking. Its drivers are Chinese export policy, MIIT production quotas and the NdPr price — not humanoid order books. Chinese Pr–Nd oxide was assessed at $97.40/kg on 4 August 2026, down about 12% from July and still below the $110/kg floor set under the US DoD–MP price-protection agreement; China's rare-earth price index closed the same day at 267.0, well below the early-2026 peak near 310. What has moved the ETF since is policy, not price: an upsized US government commitment behind USA Rare Earth's Brazilian offtake, and Beijing's own 2026–2030 materials strategy set out at a State Council briefing on 26 August. What has moved it over the past fortnight is neither, and the four-session run that closed September has now ended. REMX fell 5.1% to $72.42 on 10 September, its worst session since 23 June, inside a broad metals liquidation: US producer prices a tenth above forecast, a light Treasury buyback, the ten-year at 4.94%, silver −5.3% and the gold miners −3.5%. Then on 11 September the macro reversed — the S&P rose 0.86%, gold 0.6%, silver 1.1%, the gold miners 1.1% — and REMX fell anyway, 2.6% to $70.56. That second session is the tell. A liquidation accounts for the first day; only something specific to rare earths accounts for the second. Three smaller falls followed, 2.3% to $68.93 on 14 September alongside the whole precious complex, 0.9% on 15 September and 1.0% to $67.61 on 16 September — the lowest close since 31 July, and the sixth down session running. Then the run ended, and policy is what ended it: +2.2% to $69.10 on 17 September, flat at $69.06 on 18 September, and +1.8% to $70.27 on 21 September, when Trump's 18 September security agreement with Denmark and Greenland reopened the trade in anything holding an Arctic deposit. Greenland-linked micro-caps moved in multiples that session on press accounts not verified here, while the ETF moved 1.8% — roughly the difference between owning the story and owning a diversified basket. A third rise followed, +1.0% to $70.97 on 22 September, and it was the weakest of the three: the whole minerals tier was bid that session but none of it led, and the day's largest mover on this page was a gold name moving with gold miners rather than with rare earths. Then the run ended on 23 September, −3.1% to $68.76 — and the size of it is the point. Hawkish Fed remarks put the dollar index back above 100 and liquidated the whole metals complex that session, taking the gold miners down 4.4% and silver 4.2%; REMX fell less than either. The rare-earth-specific headline of the day — Bessent extending the Busan Agreement from 10 November to 10 January, removing a cliff edge that had been part of the scarcity premium — shows up not in the ETF but in the single names that ran past it, USA Rare Earth −6.8% and MP −4.2%. Then 24 September extended it without the same excuse: −2.7% to $66.93, its worst session since 10 September and its lowest close since 31 July, on a day the dollar index merely held above 101 rather than surging and the gold miners fell 1.3% — a third of REMX's move. So this one is not a dollar session and not a precious-metals session; it is rare-earth selling on its own account, and the two largest names in the fund did not lead it, MP closing higher. Then 25 September took it a third session lower and barely at all, −0.4% to $66.66, extending the lowest close since 31 July on no rare-earth news of any kind — this page called it the fourth at the time, and the claim audit carries the correction. The fourth came on 28 September and came hard, −3.3% to $64.47, its lowest close since 6 November 2025, on a day whose cause was an oil price and a rates repricing rather than anything upstream of a magnet. Then the run ended on 29 September, +0.5% to $64.79, and the way it ended is the more interesting half: every US rare-earth and minerals name on this page fell that session, MP 2.2%, USA Rare Earth 2.4% and Lynas 1.0%, while the fund holding them rose. A diversified basket can go up on a day its rare-earth constituents go down, which is the whole of this section in one session. Year to date REMX is 12.3% lower with a drawdown of 41.9%, against Harmonic Drive up 69.8% YTD. Still not the same exposure — and note what moved this fund across the whole run: a metals liquidation, then rare-earth-specific selling, then a security treaty, then a dollar. No humanoid order book appears anywhere in that list.

If your intent is to own the magnet bottleneck specifically, REMX is a blunt instrument for it: the cleaner expressions are a rare-earth pure play or a magnet maker, not a diversified strategic-metals basket. If your intent is to own robotics, the component names above already carry the magnet input inside their own cost base — and rising NdPr prices are a cost to them, which is part of why the co-movement between the two groups, while real at 0.36, stops well short of making one a stand-in for the other — and 23 September showed the same thing from the other end, the minerals tier down 3–7% on a dollar move while Tokyo, closed that day, reopened bid. On the magnet input itself, the honest position is narrower than this page has been stating. The last like-for-like assessment verified here is 4 August's $97.40/kg, and no same-basis update has been confirmed since — the SMM benchmark this page cites is now behind a paywall, and the figures circulating for early and mid-September, around $96.7/kg for 5 September, come from aggregators quoting it rather than from the assessment itself — so the verified figure should be read as seven weeks stale rather than as unchanged, and the aggregator number as directionally consistent rather than as confirmation. What can be said on a consistent basis is that the Chinese NdPr metal complex eased roughly 2% month-on-month into early September, its first monthly decline since May. Neither reading turns five weeks of divergence between the two tiers into a magnet-price story.

05 Tier two — the minerals list, assessed

The five critical-minerals names get the same treatment as the component makers — but they stay on their own tier, because the data says they are an upstream policy trade rather than robotics exposure. Three of the post's five descriptions turned out to be wrong or out of date, and two of the companies have nothing to do with magnets at all.

Company What it actually is Last 1m YTD 1y vs 52w high Corr REMX Corr robotics
MP MaterialsMP · NYSE Mountain Pass mine + magnet plant; DoD-backed $45.43 −19.1% −10.1% −33.4% −54.7% 0.54 0.19
USA Rare EarthUSAR · Nasdaq Stillwater commissioned, no magnet sales yet; Round Top exploration $14.08 −21.8% +18.3% −19.8% −68.0% 0.36 0.12
Lynas Rare EarthsLYSDY · ADR Largest producer outside China; first Dy/Tb $9.48 −16.6% +14.6% −14.4% −41.4% 0.62 0.15
Perpetua ResourcesPPTA · Nasdaq Antimony & gold, Idaho — not a rare earth $21.53 −14.3% −11.1% +4.5% −42.4% 0.51 0.19
NovonixNVX · Nasdaq Synthetic graphite for batteries, Tennessee $2.67 −23.9% −73.6% −81.2% −93.1% 0.37 0.25
Correlations are weekly returns over the same 104 weeks, re-bucketed by ISO calendar week. "Corr robotics" is against an equal-weighted basket of the six tier-one names. Novonix is shown restated for the one-for-ten ADS ratio change effective 27 August; its daily bars around that change keep appearing and vanishing, so the 28 August close is pinned to the verified figure rather than re-derived each run — see the method note.

Sort them by whether they touch a magnet. Only three of the five sit anywhere near the chain a robot actually consumes — and only two of those, MP Materials and USA Rare Earth, make finished NdFeB magnets. Perpetua is antimony and gold; Novonix is battery graphite. Both are legitimate critical-minerals businesses and neither goes into a robot joint.

The cards below rank them on that basis, closest to the magnet first. Note the correlation asymmetry throughout: even MP, the most robotics-adjacent name here, sits at 0.54 to REMX against 0.19 to the robotics basket — a real gap, if a narrower one than this page previously showed. These trade as mining and policy assets, which is the whole point of keeping them on their own tier.

Mine to magnet Closest to the robot

MP Materials

MP · NYSE

The only vertically integrated Western play, and the one genuine bridge between "rare earths" and "robot actuators." Q2 2026 revenue of $108.5m (+89%) came with NdPr production of 840 tonnes (+41%) and sales of 1,006 tonnes — more than double the prior year — pushing adjusted EBITDA positive and narrowing the diluted loss to $0.11 from $0.19.

The government backstop is unusually deep: the Department of Defense took $400m of preferred stock in July 2025 to become the largest shareholder, with a ten-year $110/kg NdPr price floor, and has since signed a ten-year offtake for 100% of the output of the planned 10X facility in Northlake, Texas — a $1.25bn-plus campus commissioning from 2028 that is meant to lift MP's total US magnet capacity to roughly 10,000 tonnes a year, not to produce 10,000 tonnes on its own. Beijing noticed: China's Ministry of Commerce added MP to its export-control blacklist in June 2026, and the stock fell nearly 30% through July.

The 13 Aug earnings call surfaced a new line: a multi-year, nine-figure agreement signed in July to supply separated gadolinium oxide to an undisclosed US aerospace and defense manufacturer, recovered as a co-product of the existing Mountain Pass ore stream. Terms are undisclosed so it cannot be sized precisely, but it is the clearest evidence yet that MP is building toward a multi-element refinery rather than a single-product (NdPr) business.

Q2 rev $108.5m Magnetics $16.5m NdPr floor $110/kg Gadolinium deal 9-figure, multi-yr

WatchMagnetics segment revenue. At $16.5m against $95.6m from materials it is still the small half of the business — but it is the half that matters for anything robotic, and the only number here that scales with Western magnet independence. The tape went the other way meanwhile: a 5.5% fall to $51.32 on 10 September inside a broad metals liquidation, then a further 1.6% to $50.51 on 11 September against a rising market and a rising gold complex, then it paused — +0.3% to $50.68 on 14 September, one of only two tier-two names to hold a session that took REMX to a six-week low — then −3.0% on 15 September and −0.4% to $48.99 on 16 September, +0.8% to $49.38 on 17 September, −4.3% to $47.26 on 18 September — its lowest close since 3 August — then +5.8% to $50.00 on 21 September on the Greenland pact, its largest single gain in more than a month, and +2.1% to $51.04 on 22 September — before −4.2% to $48.89 on 23 September, its lowest close since 18 September — then a pause, +0.8% to $49.30 on 24 September, one of only two names on this tier to rise on a session that took REMX to its lowest close since 31 July, then −1.0% to $48.83 on 25 September on nothing at all. Those sessions tipped the year twice. The 22 September close put MP positive year to date by fifty-two cents against its $50.52 close of 2025; 23 September took it straight back under and it has gone further since. A company whose magnetics revenue nearly doubled over the year is back below square one in the price and has taken none of it back on its own account. The 23 September fall is worth separating: the dollar-led metals liquidation that day took the gold miners down 4.4%, so MP's 4.2% is roughly market beta — but it came alongside the Busan Agreement's extension to 10 January, which removes the November cliff edge that had been part of the scarcity bid. Two columns to read carefully either way. Three more sessions took it lower without a rare-earth headline in any of them: −4.9% to $46.45 on 28 September, its lowest close since 3 August, on the oil-and-rates repricing that hit the whole tier, and −2.2% to $45.43 on 29 September, a fresh low for the move, on a session when gold recovered 1.3% and REMX itself rose 0.5%. That last one is the cleanest statement of this card's argument: the fund that holds MP went up while MP went down two per cent. Year to date it is 10.1% lower and it remains 54.7% below its high, the widest that figure has been in this run. MP shows 19.1% lower over a month, much of which is a 30-day base that rolled up to 28 August's $56.13 rather than a weaker stock, and the twelve-month cell reads −33.4%. Read both against their own dates.

Magnets Already shipping

USA Rare Earth

USAR · Nasdaq

The source post is still wrong about the timeline, but this page was wrong about the other end of it, and the correction matters more. USAR did commission its Phase 1a commercial magnet line at Stillwater, Oklahoma in Q2 2026, pulling the plant forward by about two years from the 2028 date the post implies — and the company says it “has commenced commercial production.” What it has not done is sell any of it. The Q2 10-Q is explicit that Stillwater “has recently been commissioned and has commenced commercial production; however, we have not begun generating revenue from” sintered NdFeB magnets, and the 15 September risk-factor supplement goes further, describing Stillwater and Blacksburg as “under development and… not yet completed” with “no… revenues to date from the sale of neo magnets, critical minerals or rare earth minerals.” This page previously said USAR “began filling customer orders” in Q2 2026. It did not. Phase 1a is guided to a 600 mtpa run-rate by the end of Q4 2026 and 1,200 mtpa combined with Phase 1b in Q1 2027, against roughly 5,000 tonnes at full build — every one of those a target, none of them yet a shipment.

Q2 2026 revenue was $5.8m against a $10.3m net loss (down from $142.5m a year earlier, when the company had no commercial revenue at all). None of that $5.8m is magnets: the 10-Q attributes it “all” to Less Common Metals, the Cheshire metals subsidiary acquired in November 2025, and states that all revenue “is derived from sales of casting and strip casting” — at a gross loss of $1.6m on a negative 27.2% gross margin. The balance sheet is the actual headline: $1.53bn of cash at quarter-end, up from $359.9m at year-end 2025. USAR is deploying it into corporate structure as much as capacity — it closed the acquisition of Texas Mineral Resources Corp on 7 Aug, giving it outright ownership of Round Top, and finalized a roughly 13.6% stake in French rare-earth processor Carester. It agreed to buy Brazil's Serra Verde, the only scaled ex-China producer of all four magnet rare earths, for about $2.8bn; shareholders approved the share issuance on 28 August — 108,248,297 votes for against 1,403,269 opposed, with 16,879,393 abstentions — and the combination completed on 3 September 2026, announced the following morning and filed the same day on Form 8-K under Item 2.01. This page carried it as pending for a week longer than it was; that was wrong, and the correction is the more important half of this card.

What actually closed is bigger than the price tag suggested. USAR paid $300m in cash plus 126,849,307 new shares to Serra Verde's shareholders, lenders, warrant holders, employees and consultants, and took on Serra Verde's financing with it: a facility of up to $565m from the US International Development Finance Corporation, sized to fund the Brazilian optimisation and expansion programme through to positive cash flow. The Goiás operation has been producing since January 2024 and is finishing a commissioning and optimisation programme whose first stage targets a run-rate of about 4,000 tpa of total rare earth oxide by the end of 2026. Sir Mick Davis joins the board; Thras Moraitis becomes President immediately and succeeds Barbara Humpton as chief executive on 1 October. USAR now owns an operating heavy rare-earth mine, a magnet line and a separation stake — upstream, midstream and downstream in one company, which is what MP has and no one else outside China does.

The financing behind that deal landed on 24 August 2026 and is the most consequential development on this page since the last refresh. The special-purpose vehicle that will buy 100% of Serra Verde's Phase 1 output completed an upsized $1.55bn capitalisation: a $750m Department of War investment, raised from the $500m originally contemplated, a bank senior secured borrowing-base revolver of up to $500m, and a US government forward purchase contract for not less than $300m of rare-earth product over five years. The offtake runs fifteen years on take-or-pay terms with guaranteed price floors on the magnetic rare earths — including, on the company's account, the first such floors anywhere for dysprosium and terbium. Read against the $110/kg NdPr floor MP already has, Washington is now underwriting the price of the heavy elements too, which is the part of the chain China actually controls.

And on 9 September 2026 it broke ground on a second magnet plant, which this page should have carried a run earlier. The site is Blacksburg, South Carolina — 124 acres in Bailey Industrial Park, Cherokee County, about 800,000 square feet, roughly $1.2bn of investment and some 490 manufacturing jobs, commissioning in 2028. The capacity is the part that matters: 6,400 tpa of sintered NdFeB magnets plus 5,000 tpa of strip-cast metal and alloy. On its own that is larger than Stillwater's full build of roughly 5,000 tonnes, and it places a second and bigger magnet line behind the company's own metal. Measured against MP's 10X campus, which is meant to lift MP's total US magnet capacity to about 10,000 tpa from 2028, Blacksburg is the largest single increment to announced ex-China magnet tonnage anywhere on this page. The company says it screened nearly 275 sites before choosing it. None of this moved the stock, which fell 8.8% across the two sessions that followed.

The Round Top deposit in West Texas is the part that is genuinely years out, and the distinction matters: the magnets Stillwater is producing are made from purchased feedstock, not from USAR's own mine — and the 15 September supplement flags that too, warning that feedstock delays at Less Common Metals have already constrained the plant, and that China's 22 June 2026 export-control designation “has had and is expected to continue to have an adverse impact on our ability to source key raw materials.” Round Top did produce a first dysprosium oxide sample at 99.1% purity in January. Like MP, USAR was added to China's export-control list in June 2026. The stock sits 65.0% below its 52-week high, still the widest drawdown of the robotics-adjacent names, and closing the deal did nothing to lift it. It fell 5% on the day the SPV funding was announced, 6.5% on the day of the vote, 7.4% on 31 August when the result was disclosed and 3.1% on 1 September; it then drifted through six sessions either side of completion, fell 3.4% to $17.06 on 9 September, a further 6.0% to $16.04 on 10 September — the largest fall on the page that day, though that one arrived with the whole metals complex rather than alone — and 3.0% to $15.56 on 11 September, which did not: the complex rebounded that session and USAR made a fresh low regardless, its weakest close since 31 July. The one-way tape broke only briefly — +1.0% to $15.71 on 14 September, one of only two tier-two names to hold a session that took REMX to a six-week low, then −2.0% to $15.40 on 15 September and −1.9% to $15.10 on 16 September, a fresh low for the run. Then the move finally came, and not from the company: +3.5% to $15.63 on 17 September, −1.7% to $15.37 on 18 September, and +9.2% to $16.78 on 21 September — the largest single gain anywhere on this page in this period — on Trump's security agreement with Denmark and Greenland, followed by a much quieter +1.3% to $16.99 on 22 September — and then the whole policy bid came out at once, −6.8% to $15.83 on 23 September, the largest fall anywhere on this page that session and its lowest close since 18 September. That one is not market beta: the gold miners fell 4.4% and REMX 3.1% on the same dollar move, and USAR went half as far again as either, on the day Bessent extended the trade truce past its November expiry. The symmetry is the lesson — two sessions of policy bid on a treaty about an island it has no assets on, one session of policy unwind on a truce it is not party to either. USA Rare Earth owns nothing in Greenland and is not a signatory in Busan. A fourth session then took it lower again with no policy in it at all, −2.8% to $15.38 on 24 September, and the run has not stopped since: −1.3% to $15.18 on 25 September, −5.0% to $14.42 on 28 September on the oil-and-rates repricing, and −2.4% to $14.08 on 29 September, a fifth consecutive fall and its lowest close since 29 July, on a session when the benchmark that holds the tier closed higher. That leaves it 68.0% below its high, the steepest drawdown on the page bar Novonix. Six weeks of decisive corporate progress moved this stock down 21.8% over a month; policy headlines moved it nine per cent up and seven per cent down inside three sessions. Its twelve-month return reads −19.8%, three points lower than yesterday on a two-point session because the year-ago base rolled across a weekend, and the year to date is down to +18.3% from the +27.6% it carried a week ago. The market is pricing the dilution ahead of the assets — 126.8m new shares against 244.7m outstanding is arithmetic, the assets require execution — and pricing the policy tape ahead of both. The claim audit carries the Greenland attribution.

Line commissioned Q2 2026 Q4 target 600 mtpa Magnet sales none yet Cash $1.53bn SPV funding $1.55bn Serra Verde closed 3 Sep Blacksburg 6,400 tpa Off high −67.2%

WatchThe first magnet invoice, which on the company's own account does not yet exist. Two run-rates are due by the end of this year — Stillwater's 600 mtpa of sintered magnets and Serra Verde's 4,000 tpa of rare earth oxide — and the gap between “commissioned” and “sold” is now the whole question. Every financing gate has been cleared — the vote, the $1.55bn SPV, the DFC facility — so from here the only thing left to miss is production, and the first management test is a leadership handover three weeks after the merger closed. The tape has read each corporate step as dilution arriving rather than risk lifting; the fourth-quarter numbers are where that gets settled either way.

Separation Heavy rare earths

Lynas Rare Earths

LYSDY · ADR

Operationally the strongest of the five, and now with a full year on the board. FY26 results, reported 26 August 2026, were records across the line: revenue of A$977.9m, up 76%, net profit after tax of A$222.4m against A$8.0m the year before, REO production of 13,089 tonnes (+25%), NdPr production of 7,260 tonnes (+11%) and a record average realised price of A$80.7/kg. More strategically, it became the first commercial producer outside China of separated dysprosium and terbium — first terbium oxide in June 2026, on a heavy rare-earth circuit of about 1,500 tonnes a year.

The market did not take it as a clean beat. The ADR fell 5.9% on results day before recovering 5.0% the next session, then gave back another 8% into 1 September with the rest of the mining complex, and rose in four sessions to $11.23 on 8 September. That run ended abruptly: −2.9% to $10.91 on 9 September, then −4.3% to $10.44 on 10 September in the broad metals selloff, −2.2% to $10.21 on 11 September after it reversed, −3.2% on 14 September, −0.7% on 15 September and −2.9% to $9.53 on 16 September — its lowest close since 6 January. It has since recovered the handle: +2.5% to $9.77 on 17 September, +2.9% to $10.05 on 18 September, its first close back above $10 since 11 September, then the one faller on the page's Greenland session, −0.3% to $10.02, then the tier's second-strongest session the next day, +3.1% to $10.33 on 22 September, and then −2.6% to $10.06 on 23 September in the dollar-led liquidation. Nothing from the company behind any of them, in either direction; the Sydney ordinary line followed a session later, −1.9% to A$14.39 on 24 September, in an Asian rare-earth session the wires attributed to the truce extension. Over a month the ADR is 16.6% lower against REMX's 16.3% — and that ordering, which had flipped for a week, has flipped back: the single name is falling marginally faster than the fund again, which is what a 0.62 correlation and a higher beta ordinarily produce. A fifth session followed, −1.2% to $9.94 on 24 September, its lowest close since 17 September and its first below $10 since then. Its twelve-month column crossed below zero on 23 September, from +1.0% to −8.1%, the year-ago base moving up from $10.23 to $10.95 doing most of that, and it now reads −14.4%. Three more falls have taken it lower still — −3.8% to $9.58 on 28 September and −1.0% to $9.48 on 29 September, its lowest close since 6 January 2026, on a session when the benchmark that holds it closed higher — while the Sydney ordinary line went the other way a day later, +1.4% to A$13.83 on 30 September. Nothing from the company behind any of it. The reason is on the cost side: capital expenditure on the heavy rare-earth circuit has escalated 63%, to A$294m from A$180m, which the company attributes to sourcing equipment outside China. That is the price of the scarcity premium, stated in cash.

That heavy-element capability is the real scarcity. Terbium oxide outside China has traded at $4,500–$4,700/kg against under $1,000 domestically, and dysprosium and terbium are what keep magnets stable at motor operating temperatures. The post's claim that Lynas is "now building a US processing facility" is out of date: on 16 March 2026 the US government redirected the US$96m earmarked for the Seadrift, Texas heavy rare-earth plant into a four-year purchase agreement for Lynas product instead, with a US$110/kg NdPr floor. The Texas plant is in limbo, not under construction.

FY26 revenue A$977.9m NPAT A$222.4m HRE capex +63% Seadrift redirected

WatchWhether Seadrift is revived or quietly shelved, and the dysprosium/terbium ramp against that 63% capex escalation. The heavy circuit is the part China cannot easily replace and the part no one else outside China has — but USA Rare Earth's new US-backed Dy/Tb price floors are the first sign that someone else intends to be paid for it too. A permanent CEO is also still outstanding: Pol Le Roux has run the company on an interim basis since 1 July.

Antimony Not a magnet input

Perpetua Resources

PPTA · Nasdaq

A well-financed critical-minerals project that has almost nothing to do with robotics. Perpetua secured a $2.9bn EXIM loan, board-approved in May 2026 and expected to become available in the second half of the year, on top of a $255m private placement in October 2025 backed by Agnico Eagle and JPMorgan. Construction at Stibnite in Idaho is underway.

Two caveats the post skips. First, this is predominantly a gold mine: reserves of roughly 4.8 million ounces and about 450,000 ounces of gold a year over the first four years, with antimony supplying an estimated 35% of US demand alongside it. Second, production does not begin until 2029. Antimony goes into flame retardants, ammunition and alloys — not robot joints. It earns its place on a critical-minerals list, not on a robotics one.

The tape adds a third caveat, and fifteen sessions have now sharpened it in both directions. Perpetua shows −13.1% over the past month, and that relationship inverted for a week before reasserting itself: bullion is 7.6% lower over the same 30 days and the gold miners 11.8% lower, so a 13.1% fall now sits above both — a mild amplification of the equities rather than of the metal, which is the ordinary configuration for a high-beta gold miner. The explanation is in the sessions below: several of them moved on something other than gold. On 31 August gold rose and Perpetua fell 4.7% anyway, alongside the gold miners; on 1 September gold fell 1.9%, the miners 3.9%, and Perpetua 5.8%. Then it ran in reverse: on 2 September the miners rose 3.1% and Perpetua 4.1%. On 3 September the relationship held in direction but not in size — gold 1.9%, the miners 4.0%, and Perpetua only 2.4%, for once lagging the equities it usually amplifies. Then on 4 September it decoupled altogether: gold fell 1.4% and the miners 2.2%, and Perpetua did nothing at all, +0.2% to $25.09. On 8 September the usual relationship resumed quietly: gold eased 0.8% and Perpetua 1.3% to $24.76. On 9 September it went missing again: bullion added 0.9% and the gold miners 1.1%, and Perpetua closed unchanged at $24.76, to the cent. Then on 10 September it came back with force — bullion −1.7%, the gold miners −3.5% and Perpetua −4.4% to $23.67. On 11 September it went quiet once more: bullion rose 0.6% and the miners 1.1%, and Perpetua eased 0.2% to $23.63, its lowest close since 1 September and the only tier-two name that barely moved on a day the rest of the tier fell. Then on 14 September it amplified the complex again and harder than either leg of it: bullion −1.3%, the gold miners −3.1%, and Perpetua −4.6% to $22.55, its lowest close since 4 August — before it recovered 0.6% to $22.69 on 15 September, the only tier-two name to rise on a session when gold fell again. The three sessions since split the same way. On 17 September it tracked the equities closely — the miners +3.4%, Perpetua +3.8% to $23.37 — and on 18 September it tracked them again, the miners −0.5% and Perpetua −0.6% to $23.24. Then on 21 September it decoupled upward for the first time in this run on something that was not gold at all: bullion −0.7%, the gold miners −1.1%, and Perpetua +1.9% to $23.68, moving with the rare-earth complex on the Greenland pact rather than with the metal it is actually levered to. On 22 September it went back to the miners and amplified them mildly: bullion +0.4%, the gold miners +3.6%, and Perpetua +4.6% to $24.76 — the largest single gain anywhere on this page that session, and still an ordinary gold-equity beta rather than an antimony event, with no company disclosure attached to it. That is the exception that proves the rule this card exists to state — antimony is a critical mineral, so it catches a critical-minerals bid, and none of that is the gold mine that will supply 450,000 ounces a year from 2029. Four times in thirteen sessions it has ignored a moving metal and a moving miners index, and twice it has multiplied one. That session carries a caution worth recording, because this page names GOLD as the instrument to check before attributing a Perpetua move. GOLD is Barrick, and Barrick rose 11.2% that day against a falling metal and a falling miners index. A single-name divergence that wide is company-specific, not a gold signal — which is why the comparison above is drawn against the miners index rather than against Barrick alone. Then 23 September put it back in its ordinary place and took the year with it: bullion −1.8%, the gold miners −4.4%, and Perpetua −5.8% to $23.32, its lowest close since 18 September — a mild amplification of the miners in a dollar-led liquidation, with no antimony in it and no company disclosure, exactly as on the way up the session before. Its year-to-date column crossed back below zero in the process, from +2.3% to −3.7%, one session after crossing above. Then 24 September broke the pattern in the one direction it had not yet gone: Perpetua rose 0.4% to $23.42 while the gold miners fell 1.3% and bullion 0.3% — the first session in this run where it outperformed gold rather than amplifying it, and again on no company disclosure. Then 25 September put it straight back in line and lagging slightly: the gold miners rose 0.6%, bullion 0.4%, and Perpetua 0.3% to $23.49. Then 28 September delivered the largest single fall this page has recorded on any name this run, and it was still the same relationship: −7.1% to $21.82, its lowest close since 4 August, against gold miners −5.4% and bullion −3.9% — an amplification of the equities, on a session whose cause was an oil price and a rates repricing rather than anything in the ground. Brent went back toward $106 after the White House rejected Iran's proposal to reopen the Strait of Hormuz, the ten-year Treasury yield passed 5.2%, and gold had its sharpest fall in this run. Not one part of that chain is antimony, and no company disclosure accompanied it. Across eighteen sessions Perpetua tracked the mining equities, not the metal, and one session of mild outperformance does not change that. The exposure is to gold equities, not to gold. Then 29 September made the point from the other side: Perpetua fell 1.3% to $21.53, its lowest close since 4 August, on a session when bullion rose 1.3% and the gold miners rose 1.3% — the first time in this run the name has gone the opposite way to the equities it normally amplifies, and again with nothing published. Eighteen sessions of tracking the miners, one of tracking nothing. Its year to date now reads −11.1% and the drawdown 42.4%, and its twelve-month cell fell from +23.6% to +3.1% on 28 September — twenty points, almost none of it price, because the year-ago base rolled onto a day 11.4% higher — before recovering to +4.5% as that base rolled back down. Antimony went nowhere throughout: $51.80/kg at the 18 September assessment, down 5.85% year to date and about 43% from a year earlier. The commodity that earns this name its place on a critical-minerals list is flat to falling either way.

EXIM loan $2.9bn Gold miners −11.8% 1m Antimony −5.9% YTD Gold ~450koz/yr US antimony ~35% First production 2029

WatchFinancial close on the EXIM facility, still guided to the second half of 2026 as of the 17 August quarterly and not yet done. Approved is not drawn — and with first metal four years out, financing terms matter more than commodity prices here. Cash at 30 June was $574.2m.

Graphite Not a magnet input

Novonix

NVX · Nasdaq

The weakest name on either list, and it deserves a plain warning rather than a bullet point. Novonix makes synthetic graphite for battery anodes in Chattanooga, Tennessee — a battery input, not a magnet input, and not part of any robot's bill of materials in the way the tier-one components are.

The financials are severe, and on 31 August 2026 the auditor said so in the accounts. The half-year report for the six months to 30 June shows a loss of $24.6m against $20.1m a year earlier, net operating cash outflows of $23.1m, and cash down to $59.5m from $79.9m at 31 December. Net current liabilities stand at $2.5m where six months earlier there were net current assets of $5.6m. The independent auditor's review report carries a material uncertainty that may cast significant doubt on the group's ability to continue as a going concern. The same report has the company backing away from a land purchase beside its Chattanooga plant and stretching the Riverside ramp-up, which is what conserving cash looks like in a capital project. The genuine positive is still the US$103m of 48C tax credits certified in April 2026 for the Riverside project — but those vest only when the first 11,000 tpa of capacity is in service before 7 April 2028, and a slower ramp is the one thing that deadline cannot absorb. Mass production for lead customer Panasonic is not expected before 2027.

The going-concern note names the trigger, which is what makes this more than a slow burn. $35m of face value in unsecured convertible debentures issued to Yorkville carries an A$0.12 floor on the ASX share price: a fall below it may constitute an amortisation event, under which the company could be required to redeem part or all of the outstanding balance in cash. On 31 August, the day that note was published, the ordinary shares closed at A$0.11, down 12.0% on 12.3m shares against a recent average nearer 3.5m, and the Nasdaq line fell 12.3% the same session. They have not recovered: A$0.11 on 1 September, A$0.105 on 2 and 3 September, A$0.11 on 4 September, A$0.105 on 7 September, then −9.5% to A$0.095 on 8 September — the first close below ten cents — A$0.098 on 9 September, a 7.1% bounce to A$0.105 on 10 September on 10.8m shares against a recent average nearer 3.5m, and A$0.105 again on 11 September — ten consecutive closes below the floor, the lowest of them 20.8% under it. Then on 14 September the shares rose 14.3% to A$0.12 on 7.0m shares, their first close back at the threshold since 28 August, with no ASX announcement attached to it. That was the top. Three sessions at A$0.11 followed, then A$0.10 on 18 September on 23.2m shares — by far the heaviest volume of this entire run, against a recent average nearer 3.5m — A$0.099 on both 21 and 22 September, A$0.097 on 23 September, a fresh low for the run, and A$0.099 on 24 September. The clause turns on a fall below A$0.12: the shares have now closed below it in eight consecutive sessions since touching it, the last of them 17.5% under it, and the heaviest volume of the run came on the way down. They are also 38% below the A$0.16 the June placement was struck at. Nothing has been announced. This is the position the going-concern note describes, arrived at. The directors rest the going-concern basis on a history of raising capital, including $14.5m from a June 2026 placement; the share purchase plan that followed it raised A$0.96m.

The US listing is a separate problem, already solved once. On 12 August the company agreed with BNY to change its ADS ratio from one ADS per four ordinary shares to one per forty — economically a one-for-ten reverse split of the ADSs, effective 27 August 2026, done to lift the traded price back over Nasdaq's minimum bid threshold. The underlying ASX ordinary shares are untouched; only the US wrapper changed. On the new ratio the US line fell to $2.86 on 3 September, rebounded 5.2% to $3.01 on 4 September, fell 8.3% to $2.76 after Labor Day, eased 0.7% to $2.74 on 9 September — a two-year closing low — then rose 6.2% to $2.91 on 10 September, the only US line on this page to rise that session and a day behind the Australian bounce it was following, added a further 2.4% to $2.98 on 11 September, and then jumped 8.4% to $3.23 on 14 September — its highest close since 28 August and the largest single gain anywhere on this page that session — before handing most of it back, −5.6% to $3.05 on 15 September. Since then it has followed the Australian line down with a session's lag and no news at either end: $2.97 on 16 September, $3.03 on 17 September, −4.8% to $2.885 on 18 September, −1.6% to $2.84 on 21 September, a near-flat $2.85 on 22 September, −3.4% to $2.801 on 23 September and then −5.7% to $2.64 on 24 September — its worst session since 8 September and the lowest close in its three-year series, taking out the $2.74 of 9 September that had been the floor. The 52-week low proper is $2.52, an intraday print rather than a settlement. The Sydney line, a session ahead, closed A$0.098 on 25 September — a ninth consecutive close below the A$0.12 Yorkville amortisation threshold, 18% under it, and 39% below the A$0.16 the June placement was struck at, with no announcement attached to any of it. It then steadied: +1.5% to $2.68 on 25 September and +0.4% to $2.69 on 28 September, the only riser in the whole minerals tier on a day the rest of it was sold off. That leaves the US line 93.1% below its high, 81.2% down over a year — three points of that arriving on a 0.7% session as the year-ago base rolled up 16.4% across a weekend, not on the price — and 73.6% lower year to date — still the worst figures in every column on this page, and improved in three of them only because the lookback bases rolled off a crash rather than because the price recovered. A ratio change buys compliance, not solvency: in the twenty-two sessions since it took effect the US line has gone from $3.51 to $2.69, still clear of Nasdaq’s $1 threshold but well inside the range where it matters.

H1 loss $24.6m Cash $59.5m Auditor going-concern doubt Yorkville floor A$0.12 Off high −93.1%

WatchWhether the A$0.12 floor being breached is now treated as an amortisation event. The shares touched the level exactly on 14 September and have closed below it in every one of the twelve sessions since, ending at A$0.097 on 30 September, 19% under it, with the heaviest volume of the run on the way down. That is no longer an open question about whether the threshold gets tested; what is open is the consequence, and a cash redemption against a $59.5m balance falling by roughly $23m a half is a large one. Dilution or a raise was already the base case; the auditor has written the reason into the accounts and the tape has now written the trigger. It is the only name on this list where solvency is the question rather than growth.

Correlation with the robotics basket

The same 104 calendar-aligned weekly returns, measured against an equal-weighted basket of the six tier-one component names. The ordering still inverts — the minerals names lead on REMX, the robotics names lead on the basket — just not as sharply as before the alignment fix.

Robotics component names Rare earth & critical minerals names
06 Tier three — the magnet layer

This layer explains the correlation result above. Robotics OEMs almost never buy magnet blocks directly — magnet procurement sits upstream, with the motor, encoder and actuator manufacturers. That is part of the mechanism behind a still-moderate 0.36 correlation between the robotics basket and REMX: the magnet is real, and it enters the robot through Nidec's and Yaskawa's purchase orders, priced into their cost of goods, but not through anything an assembler or an ETF holder touches directly.

It also explains why the layer is so hard to own. China controls roughly 90% of midstream NdFeB processing, and most of the Western and Japanese alternatives are private, subsidiaries, or state-funded projects that have not yet produced at scale. Of the seven magnet names below, three are directly investable — and only TDK combines real scale in magnets with a clean listing.

Company What it makes How you would own it Last YTD 1y Corr robotics
TDK6762.T · Tokyo Largest non-Chinese NdFeB maker; ferrite Direct — listed in Tokyo ¥2,981 +34.8% +38.8% 0.53
Aichi Steel5482.T · Tokyo Permanent magnets for robotic actuators Direct — listed in Tokyo ¥3,040 +4.1% +12.8% 0.16
Arnold Magneticvia CODI · NYSE Permanent magnets, magnetic assemblies Only via Compass Diversified, its parent $11.04 +130.0% +67.5% 0.17
MP MaterialsMP · NYSE Sintered NdFeB — see tier two Direct — the only listed mine-to-magnet $45.43 −10.1% −33.4% 0.19
Proterialformerly Hitachi Metals Advanced magnetic materials, RE-free R&D Not investable — private since 2022 — — — —
Niron Magneticsprivate · Minnesota Iron nitride, rare-earth-free magnets Not investable — VC and DoW funded — — — —
Noveon Magneticsprivate · Texas Sintered NdFeB from recycled feedstock Not investable — private, Series B — — — —
Correlations are weekly returns against the equal-weighted tier-one basket over 104 weeks, re-bucketed by ISO calendar week. TDK at 0.53 is still the exception that proves the rule — and it is a large Japanese electronics exporter, so most of that is shared market beta rather than magnet demand. Aichi Steel, Arnold and MP sit at 0.16–0.19: the listed magnet makers still trade only loosely with the component makers who buy from them.
Listed Largest ex-China

TDK

6762.T

The most substantial magnet business you can actually buy. TDK is the largest non-Chinese neodymium magnet manufacturer by revenue and the most globally diversified, producing sintered NdFeB in Japan and China alongside ferrite and metal-powder products. The company's origins are literally magnetic — it was founded in 1935 to commercialise ferrite.

Two honest caveats. Magnets are a modest slice of the group: TDK is dominated by its energy business, including ATL, one of the world's largest lithium battery makers, plus passive components and HDD heads. And its 0.53 correlation to the robotics basket — the highest of any name outside tier one, above every robotics ETF tested — largely reflects its status as a large Japanese electronics exporter moving with the same market, not humanoid demand reaching its P&L. You would be buying a battery-and-components group with a major magnet business attached.

Price ¥2,981 YTD +32.0% 1y +39.0% Corr robotics 0.53

WatchAny segment disclosure sizing magnets against the battery business. Without it, the magnet exposure is real but unmeasurable — the same problem Aichi Steel has, at much larger scale. The 0.53 correlation keeps earning its keep: TDK fell 6.9% on 8 September — the worst session of any name on this page — in a yen-driven selloff that had nothing to do with magnets, recovered 1.4% and a further 1.4% to ¥2,850.5 by 10 September, gave back 1.5% on 11 September as oil and bond yields took the whole Tokyo market down, added 0.3% on 14 September while the index fell 0.81% on its AI complex, rose a further 0.6% on 15 September and added 1.4% to ¥2,872 on 16 September, before giving all of it back and more on 17 September, −2.3% to ¥2,806 — one of only two Tokyo names on this page to fall on a rising index — then recovering +1.4% to ¥2,845 on the Bank of Japan's hike, the smallest of the five Tokyo gains that session — and then, on the reopen after the three-day holiday, the largest: +3.9% to ¥2,954.5 on 24 September, the biggest single gain anywhere on this page that day, on a session led by the semiconductor-equipment names rather than by anything magnetic. It added +0.8% to ¥2,978 on 25 September, its highest close since 7 September — though the index rose 1.30% that day, so this was a lag rather than a lead — and gave a little back on 28 September, −0.8% to ¥2,955, roughly with an index down 0.73%. It moves with Murata and Taiyo Yuden rather than with the gearbox makers, which is the point: this is a Japanese electronics exporter that happens to make magnets. Note what it did not do on 14 September: the AI-pace selloff that took the US semiconductor complex down more than 5% that session left TDK higher on both sides of it. A passive-components maker is not an AI-silicon name, and the tape agrees even when the sector label does not. It eased again on 29 September, −1.2% to ¥2,919, against an index down 0.60%, then took it back on the quarter's last day, +2.1% to ¥2,981 on 30 September, its highest close since 1 September — and on an index up 1.94% that is a lag again, which is the shape this name keeps making. Down 3.2% over a month, where a fortnight ago that figure was 10.6%, with a twelve-month return of +38.8% that has swung between +32% and +51% inside a month, purely on which day the lookback base lands — and which gained seven points on the reopen alone, as the holiday rolled its base six days onto a lower one. The same calendar effect this page keeps flagging in Nidec's and Harmonic's columns.

Listed Toyota group

Aichi Steel

5482.T

The cleanest direct way to own a magnet maker on this list. A Toyota Group company engineering permanent magnets tuned for robotic actuators, with an explicit design goal of reducing dependence on constrained rare earths — the same strategic bet Proterial and Niron are making, but in a listed vehicle.

It is also the steadiest chart in this report: up 12.8% over a year and 13.5% below its 52-week high — now the tightest drawdown on the page, Nidec having vacated that position by falling twenty points in two sessions — against 28–45% for four of the six tier-one names. That is partly a virtue and partly a warning: magnets are a modest slice of a diversified steelmaker, so the humanoid narrative barely moves it in either direction, up or down. It sat out the 4 September rally with a 0.8% fall, sat out Monday's 2.1% index rally with a 0.2% fall, and lost 1.8% on 8 September on a day the component names lost 3–7%. What it had not sat out was the drift: four consecutive falls, ending −0.8% to ¥3,115 on 10 September, on a day Harmonic Drive rose 2.7% and Nidec 5.6%. Then it did the rarest thing on the page — on 11 September it closed unchanged at ¥3,115, to the yen, while the Nikkei fell 1.93% and every other Tokyo name here lost ground. On 14 September it added 0.3% to ¥3,125, its first rise since 3 September, on a day the index fell again, added 0.8% on 15 September, 1.3% to ¥3,190 on 16 September and a further 2.7% to ¥3,275 on 17 September — four consecutive gains and its highest close since 3 September — before doing the one genuinely contrary thing on the page: −1.4% to ¥3,230 on 18 September, the only Tokyo name here to fall on the Bank of Japan's hike, on a session when the index rose 1.38% and the gearbox makers rose 0.8–4.8%. Then it did the contrary thing again from the other side: on the 24 September reopen it closed unchanged at ¥3,230, to the yen, while the index rose 0.76% and every other Tokyo name on this page moved 1.2–3.9%. It repeated the trick on 25 September, −0.2% to ¥3,225 against an index up 1.30% — two consecutive sessions of doing almost nothing while Tokyo moved two points. Its four-week column is now 0.0%, flat to the yen against a 26 August base of ¥3,225. Steadiness cuts both ways. It sat out the drawdown and it has now sat out three rallies, which is exactly what a magnet line inside a diversified steelmaker should be expected to do — and it is why this name will not tell you anything about humanoid demand in either direction.

Price ¥3,040 1y +12.8% Off high −13.5% Ex-div ¥75, 29 Sep Corr robotics 0.16

One caution attaches to the figures above, because the largest session this card has recorded was not a market judgement. On 29 September 2026 the shares fell 3.9% to ¥3,080 — the worst of the six Tokyo names that day — and they went ex-dividend the same morning, ¥75.00 a share, payable 26 November. On the ¥3,205 previous close the distribution is 2.3 points of that 3.9%, leaving about 1.6% of actual repricing, and nothing was disclosed by the company. Both the year-to-date cell and the drawdown widen on the ex-date for the same mechanical reason. It is the dividend version of the base-roll problem this page flags elsewhere: a column can move several points because of a corporate action, and a reader comparing it with yesterday's is comparing two different things. The following session removes the excuse, though, and it is the reason the caution does not end there. 30 September took it a further 1.3% to ¥3,040, its lowest close since 31 July, on a day the Nikkei rose 1.94% and every other Tokyo name on this page went with it. Three points of relative ground on a session with no dividend in it and nothing disclosed is the only part of the two-day fall that is a market judgement, and it is the part worth watching.

WatchAny disclosure sizing the magnet business separately from steel. Without it you are buying a steelmaker with a magnet option attached, and the option is not priced because it is not visible.

Subsidiary Owned, not listed

Arnold Magnetic Technologies

via CODI

A real magnet business you cannot buy directly. Arnold makes permanent magnets, precision thin metals and magnetic assemblies to the tolerances robotics OEMs need — and in March 2026 signed a distribution agreement with USA Rare Earth, linking it straight to tier two. But it has been a subsidiary of Compass Diversified since a $130.5m acquisition in 2012, and CODI is the only way in.

That is a poor trade for magnet exposure, and the reason is not subtle. CODI is a diversified holding company whose stock fell 59% in May 2025 when a probe found pervasive accounting fraud at its Lugano Diamonds unit. It restated fiscal 2022–2024, deconsolidated Lugano after a Chapter 11 filing in November 2025, triggered credit-facility defaults requiring forbearance, and suspended its distributions. The stock is up 133.3% year to date because it is recovering from that hole, not because of magnets — and it fell 2.7% on 9 September and a further 2.3% to $10.96 on 10 September, its lowest close since 6 August, in a session that had nothing to do with either magnets or diamonds. It has since gone nowhere with unusual precision: +0.5%, +2.7% to $11.31, −1.9%, −0.8%, +0.6%, −0.5%, +1.6% to $11.21 on 21 September, +1.1% to $11.33 on 22 September, +0.2% to $11.35 on 23 September — the only US name on this page besides Ambarella to rise on a day the minerals tier was liquidated — −0.9% to $11.25 on 24 September, unchanged at $11.25 on 25 September, −0.4% to $11.20 on 28 September — one of only two US names on this page to fall less than a point on a day the minerals tier was sold off wholesale — and −1.4% to $11.04 on 29 September, its largest fall of the sequence and its lowest close since 18 September, on a session when the metals complex recovered. That is thirteen sessions inside thirty-five cents, eight cents above the 10 September low they started from. Nothing about Arnold changed in either direction across any of them, which is the recurring problem with owning a magnet business this way: the only listed route to it is a holding company whose price is set by its own recovery.

The Q2 2026 call, held 17 Aug, is the freshest read on Arnold specifically. Subsidiary adjusted EBITDA came in at $91.5m (+12.6% year over year), helped by the 1 May sale of the Sterno food-service business, whose proceeds (over $280m) went straight to paying down the senior secured term loan — total debt fell to $1.59bn from $1.89bn at year-end 2025. COO Zach Sawtelle, who succeeds retiring CEO Elias Sabo at the end of 2026, called Arnold's segment "a standout, up nearly 50%," with a strong backlog tied to non-China rare-earth magnet sourcing and progress at a Thailand facility. Management said it is still pursuing further divestitures to cut debt, but did not name Arnold as a candidate — if anything, a segment growing 50% is the one they would want to keep. CODI shares still fell 4.8% on the day.

Parent CODI YTD +130.0% Arnold EBITDA ~+50% YoY Corr robotics 0.17

WatchWhether CODI divests Arnold. Management's 17 Aug commentary points the other way for now — Arnold was singled out as a growth standout, not flagged among the divestiture candidates — but a holding company still repairing its balance sheet post-Lugano remains a seller in waiting.

Private Rare-earth-free

Niron Magnetics

private · Minnesota

Not investable, but the most strategically interesting name in this section — because it is trying to make the bottleneck irrelevant rather than relieve it. Niron's iron nitride permanent magnets, out of University of Minnesota research, use no rare earths at all. If they work at scale, the entire NdPr supply argument underpinning tier two weakens.

It just got a serious endorsement: on 7 August 2026 the Department of War's Office of Strategic Capital issued a conditional commitment for a direct loan of up to $150m over 20 years for a 287,000 sq ft plant in Sartell, Minnesota — intended as the world's first full-scale iron nitride production site, targeted at robots, defence systems and electric motors. The same release names a second $150m loan from the Shakopee Mdewakanton Sioux Community for the same site, so the plant carries up to $300m of committed debt against roughly $50m of venture capital raised to date.

Construction reached a visible milestone on 10 September 2026: Niron raised first steel at Sartell and, in the same release, disclosed an equity investment from Honda, made through Honda Xcelerator Ventures on undisclosed terms. That is the part worth marking. Every dollar behind this company so far has come from venture funds or from government — the Department of War loan, the tribal loan. An automaker putting its own balance sheet into rare-earth-free magnets is a customer-side endorsement, and customers are the constituency whose behaviour would actually reprice tier two.

The number that matters for tier two is the capacity. Sartell is scoped at up to 1,500 tonnes a year of rare-earth-free permanent magnets, operational in 2027 — small against MP's planned ~10,000 tonnes, but Niron says a follow-on 10,000 tonne US plant breaks ground in 2028, with site selection already under way. If the second plant lands on schedule, the rare-earth-free capacity arriving at the end of this decade is the same order of magnitude as the Western NdFeB capacity being subsidised into existence today.

DoW loan up to $150m Announced 7 Aug 2026 Sartell 1,500 t/yr, 2027 First steel 10 Sep 2026 Honda equity, undisclosed Rare earths none

WatchSartell's commissioning, still pointed at 2027 now that the structure is going up, whether the 10,000-tonne follow-on site is actually named, and whether any other original-equipment maker follows Honda in. Track it as a threat to the tier-two thesis rather than as a position — the first credible rare-earth-free magnet at volume reprices every name in that tier downward.

Private Context only

Proterial, Noveon and the Chinese incumbents

Proterial — formerly Hitachi Metals, a genuine heavyweight in advanced magnetic materials and rare-earth-free development — has not been buyable since October 2022, when a Bain Capital-led consortium completed a roughly $7.5bn take-private and the shares were delisted. It was renamed in January 2023. Any list presenting it as a way to invest in magnets is out of date by nearly four years.

Noveon Magnetics is a private Texas manufacturer producing sintered NdFeB through its EcoFlux recycling process — a closed-loop route that sidesteps mining entirely. It has raised a $75m Series B and is operational, which makes it a real competitor to MP and USAR, just not a tradeable one.

On the Chinese side, the incumbents are what make the ~90% midstream share real. Two names circulating in research summaries, Ningbo Zhanhao and Mainrich Magnets, could not be verified as listed entities and should not be treated as tickers. The clearest listed Chinese pure-play in rare-earth permanent magnets is Ningbo Yunsheng (600366.SS) — A-share access and Chinese policy risk apply, which is much of the reason the West is building alternatives at all.

Proterial private since 2022 Noveon $75m Series B China midstream ~90%

WatchConsolidation. A Western magnet maker being acquired, floated or spun out is the most likely route by which this layer becomes investable at all — and every name here is a candidate.

07 What would move this list
Order books, not forecasts

Harmonic Drive's quarterly humanoid order figure and Ambarella's robotics design wins are the only two disclosures on this list that convert narrative into countable units. Everything else is guidance.

1 January 2027

US defence sourcing rules bar Chinese-origin NdFeB magnets, tungsten, molybdenum and tantalum across the supply chain. This is the date the minerals tier is actually trading on.

Nidec, 30 September

The quality report landed on 4 September and found no material financial impact. The accounting strand has a hard date: the filing deadline for the annual securities report for the year ended March 2026 was extended on 30 June from 30 June to 30 September. That date has now passed with no restated accounts verified, so the extension is the story until the filing appears. The April–June quarter behind it is still missing. The stock spent weeks inside 3.4% of a 52-week high, closed limit-down on 28 September on a press report of a ~¥1tn retroactive impairment, then took back 4.7% on 30 September once the board change became a disclosure: Kishida resigned on 29 September and Michio Kaida was appointed. The impairment did not. Its published range still runs from the ~¥250bn Nidec put under review to the ¥1tn the press reports, and the filing is what prices all of it.

Price floors spreading to Dy/Tb

Chinese NdPr oxide has fallen below the $110/kg DoD-backed Western floor. The 24 August USA Rare Earth SPV extends guaranteed floors to dysprosium and terbium for the first time — watch whether the next deal does too. Floors are bullish REMX and a cost headwind for the component makers.

The 2027 volume ramp

The entire thesis assumes humanoid volumes inflect from 2027. Safety standards are not expected until around 2028, and the projected NdPr deficit widens to 21,000 tonnes by then. Slippage hits the tier-one names first.

Segment disclosure

Schaeffler breaking out actuators, or Ambarella breaking out robotics, would let this watchlist be priced on robotics revenue instead of inference. Neither does today.

Western magnet tonnage

MP's magnetics revenue and USA Rare Earth's 600 mtpa target are the two live measures of whether ex-China magnet supply is actually materialising — and only one of them is yet a revenue line at all, because USAR states it has not commenced sales of neo magnets. Both report quarterly; both are currently small enough to verify claim against invoice. The announced pipeline behind them grew again on 9 September, when USAR broke ground at Blacksburg, South Carolina on 6,400 tpa of sintered NdFeB for 2028 — bigger than Stillwater's full build, and still a groundbreaking rather than a tonne.

Greenland, from headline to permit

The 18 September US–Denmark–Greenland security agreement repriced the rare-earth tape in one session without adding a tonne of capacity. Greenland has no scaled rare-earth mine, and the named projects need permits, infrastructure and local consent. Watch whether a permit or an offtake actually follows; until one does, this is a policy premium on the whole tier, and the names here with no Greenland exposure at all caught most of it.

Iron nitride at scale

Niron's Sartell plant, backed by a conditional $150m Department of War loan and a matching $150m tribal loan, raised first steel on 10 September and targets 1,500 t/yr from 2027, with a 10,000 t/yr follow-on breaking ground in 2028. Honda has now taken equity alongside the state money. A working rare-earth-free magnet at volume does not help tier one much — it undercuts tier two.

24 September, then 10 November

Xi met Trump at the White House on 24 September, arriving at Joint Base Andrews the day before for a 23–25 September state visit — and the second date moved before the meeting did. On 23 September Treasury Secretary Bessent said the Busan Agreement, due to lapse on 10 November, would be extended to 10 January 2027, adding that whether a broader deal lands by then “was not yet clear”. Removing the November cliff edge removes the nearest hard catalyst under the scarcity premium, and the tier repriced for it in the same session: USA Rare Earth −6.8%, MP −4.2%, REMX −3.1%, with the Asian rare-earth names following on 24 September. Tier two now trades both ways off these: a durable arrangement erodes the scarcity premium, a lapse restores it, and an extension merely moves the date the question gets asked. Beijing blacklisted MP and USA Rare Earth in June 2026 and MP fell ~30% through July; further list additions remain the clearest downside catalyst, and barely register in tier one. One counter-current to the thaw trade, reported by Reuters on 4 September: some Chinese suppliers have refused US shipments since early August, after Beijing sanctioned the Responsible Business Alliance, and some US buyers have waited over six months for licences. The physical market was tightening in the same fortnight the equity premium compressed, and it still is: China shipped 512 tonnes of magnets to the United States in August, 21% fewer than in July, while its total magnet exports fell only 6%, to 5,010 tonnes. An extension of the truce is not a resumption of licences.

08 Method & caveats

Prices are last closes from Yahoo Finance chart data, taken as the most recent completed session in each venue, which means the as-of date usually differs by market. The ordinary weekday shape holds this run: Tokyo and the ASX are 30 Sep 2026, both closed before this refresh ran, while Xetra and the US are both 29 Sep 2026, because a 07:00 UTC refresh reaches them before either has opened. That is the plain midweek shape — a single calendar day between the Asian and Western lines, the narrowest this page gets. It does not make the columns quiet. The Western year-ago bases rolled across a weekend this run, from 26 to 29 September 2025, and one of them moved a long way in the step: Novonix's base rose 16.4%, from $12.20 to $14.20, so its twelve-month cell went from −78.0% to −81.2% on a session in which the stock fell 0.7%. Three points of that column are the calendar and none of it is the company. Read every column against its own base date, and treat a large move in one on a small move in the price as a date problem until shown otherwise. That is the calendar and not the companies. A venue date is still not a page date; read each column against its own. One trap, recorded on 19 Aug 2026: Yahoo’s daily bar array can lag a venue’s latest close, and that afternoon it still ended at the 18 August Tokyo session while the quote metadata already carried the 19 August close. Taking the bars at face value would have shown Harmonic Drive at ¥5,960 rather than ¥5,670, understating the fall by about five percentage points. The German feed keeps swallowing sessions, and the running tally is the argument for the method rather than against it. This run the feed handed back a clean sheet for the first time since late August. 24 September — the largest session of the series at −6.2%, and the only one closed on four independent routes rather than two — has backfilled at exactly €6.54, the figure the auction bar, previousClose, chartPreviousClose and an independent German quote service all carried at the time. That is sixteen holes, sixteen reconstructions, sixteen confirmed to the cent, and the clean sheet of the last two runs did not survive this one. A seventeenth hole opened on 29 September: Schaeffler's daily bar for that session returns null while 25, 28 and 30 September are all present, so the gap is one session deep and the procedure ran again. It closed on the two standard routes and they agree: regularMarketPrice at €6.40, stamped 17:35:15 CEST against a 17:30 close, on a request made before Xetra reopened; and previousClose at the same €6.40 on a five-minute request made after it reopened. The five-minute continuous series is the instructive part once more, because it stops at 17:25 showing €6.39 and never prints the auction — taking that tick instead of the auction would have published a €6.39 close and a 1.1% session rather than 0.9%, which is the same one-cent trap that made 22 September worth recording. Sixteen reconstructions confirmed and one open, and the procedure has now been used on seventeen cases and contradicted on none of them. The rule stands with its clause: when a German bar is missing, prefer the auction print, and where the intraday series stops short of the auction, previousClose on a request made after the venue reopens is the auction, not the last tick before it. The US feed's own hole has healed too. The 22 September daily bar was missing for four days for Ambarella, Lynas's ADR, Perpetua, Novonix, REMX, Compass Diversified and the iShares gold trust, while MP, USA Rare Earth and the SPDR gold trust carried it throughout — the same split, and mostly the same names, as the 28 August attrition recorded below. All seven were closed from previousClose and all seven have now returned, matching the reconstruction on every one: Ambarella at $67.06, REMX at $70.97, Perpetua at $24.76, Lynas at $10.33, Novonix at $2.85. That last one is the figure the claim audit's newest row turns on, and it is worth noting that the page's table had it right on the day and only the prose did not. The same gap hit an earlier run from the opposite direction, when the daily bars for every US name ended at 2 September while the metadata already carried the completed 3 September close. The metadata timestamp, converted to exchange-local time, is what decides whether a session is complete. Returns are computed on the local primary line, so no currency translation is embedded. This is a dated snapshot — the page cannot fetch live quotes and does not pretend to. It is refreshed daily at 07:00 UTC, and the compiled date in the masthead moves every time any content on this page changes, so that stamp is always the age of what you are reading.

28 Aug 2026: the corporate-action trap. Novonix changed its ADS ratio on 27 August, effectively a one-for-ten reverse split of the US line. Yahoo adjusted its quote metadata immediately — the 52-week high became $38.60 — but had not yet restated the daily close history, which still ran to $0.435. Read together, the two would have put Novonix 98.9% below its 52-week high, an invented 10× drawdown. Yahoo restated the history in stages, and for a fortnight put the seam in the wrong place: the 10× step sat between 21 and 24 August, three sessions before the change took effect on 27 August, so 24–26 August were carried at post-change prices they never traded at. That restatement has now completed. The whole series is on the post-change ratio, the misplaced step is gone, and a scan of two years of daily bars finds no jump larger than the two genuine ones from November 2024 and October 2025. The figures on this page were computed throughout with both sides on the post-change ratio, scaling closes at the seam the data actually contained rather than the one the corporate action implied — and they did not move when the vendor caught up, which is the only real test such a patch gets. Taken raw at the time, the same mismatch would have reported Novonix up 618% in a month, the earlier error wearing the opposite sign. Any screen mixing adjusted metadata with unadjusted bars across a corporate action produces the same class of error, silently.

A hole in the German feed, since filled. Yahoo's daily bars carried no 28 August close for any German single stock — Schaeffler, SAP, BMW and Continental all return null for that session, as do the Frankfurt, Munich, Düsseldorf and Hamburg lines, so it is one upstream gap rather than several — while the DAX index itself printed 26,570.0 that day. Taking the bars at face value would have held Schaeffler at its 27 August close of €7.35 and reported a 2.4% rise as a flat session. The €7.53 on this page is reconstructed from the intraday series for 28 August and cross-checked against an independent price history that agrees to the cent and matches Yahoo's own daily bars for 24–27 August exactly. A missing bar is not the same as an unchanged price. Yahoo backfilled the session later the same day at €7.53, matching the reconstruction to the cent.

The German hole is now a standing feature — and it heals itself, which is the useful part. It has recurred on eleven sessions since late August, and it is not Schaeffler-specific: SAP and Siemens return null for exactly the same days, so it is one upstream gap rather than a broken ticker. What has changed is that the earlier gaps have since backfilled, which turns them into a test of the patch. Yahoo now carries daily bars for 28 August and 1–4 September, and every one of them matches the figure this page reconstructed at the time to the cent: €7.53, €7.22, €7.02, €7.30 and €7.43. Five reconstructions, five exact confirmations, using two different routes — the neighbouring session's quote metadata, and the intraday series. The 7 and 8 September holes needed a third route, because both were still missing while Xetra had already opened on 9 September, so the metadata carried a live quote rather than either settlement and the standard 5-minute series stops at 17:25, before the closing auction. Requesting the 5-minute series with pre- and post-market bars included returns the auction print itself, stamped 17:35 CEST: €7.34 on 7 September and €7.43 on 8 September, the latter on 229,007 shares against a few thousand in each of the preceding bars — the volume signature of a closing auction rather than a stray tick. The 8 September bar has since backfilled at exactly €7.43, a sixth reconstruction confirmed; the 7 September bar has still not returned at all. The 9 September close, €7.40, came back a fourth way and the simplest one yet: the daily request, made before Xetra's 10 September auction, still carried 9 September's settlement in regularMarketPrice stamped 17:39 CEST, and the 5-minute request made at the same moment returned the same €7.40 in its previousClose field. Two independent fields, one figure — and the vendor has since backfilled that session at exactly €7.40, a seventh reconstruction confirmed. Taken from the bars alone the page would have carried Schaeffler at €7.43 and called a live session unchanged. 11 September behaved the same way: €7.19 in regularMarketPrice, stamped 17:35:12 CEST against a 17:30 close, while the daily bars stopped at 10 September — and that session has since backfilled at exactly €7.19, an eighth reconstruction confirmed. 14 September has since backfilled at exactly €6.95, a ninth reconstruction confirmed, and 15 September at exactly €6.78, a tenth — that one having been closed by two independent routes on the day it opened, the metadata auction stamp and the 17:35 five-minute bar on 575,656 shares, rather than after the fact. 16 September took a different second route again: €6.86 in regularMarketPrice stamped 17:38:13 CEST, with the five-minute series stopping at 17:25 and never printing the auction, so the corroboration came from previousClose on a request made after Xetra reopened — and that session has since backfilled at exactly €6.86, an eleventh reconstruction confirmed. So has 7 September, at exactly €7.34, a twelfth — the hole that stayed open for a fortnight, and the only one that needed the extended-hours request to close at all. 21 September closed the quickest of that group: the five-minute series printed the 17:30 auction at €6.99 on the day, matching regularMarketPrice at 17:35:12 CEST, and it has since backfilled at exactly €6.99, a thirteenth reconstruction confirmed. 22 September followed at exactly €7.13, a fourteenth — the most instructive of them, because the intraday series stopped at 17:25 showing €7.16 and the page took previousClose over it; had it taken the continuous print it would have published a 2.4% session rather than a 2.0% one. 23 September has now backfilled at exactly €6.97, a fifteenth. Sixteen holes, sixteen reconstructions, fifteen of them confirmed to the cent; only 24 September, the largest session of the lot at −6.2%, is outstanding — and it is the one closed on four routes rather than two. That is settled enough to be a procedure rather than a surprise — when a German bar is missing, take the auction print from the metadata timestamp and check it against a second field before believing it.

Bars that come and go. Novonix's daily history around its 27 August ADS ratio change is not stable between requests: 28 August read $3.51 at one run and had disappeared again, along with 26 and 27 August, by the next. Left alone, that would have moved the name's correlation and shown a four-session fall as a one-day move. The 28 August close is pinned to the verified figure so the series does not wobble with the feed. By 3 September the instability had spread well beyond Novonix: the whole 28 August US session had gone missing for Ambarella, REMX, Perpetua, Lynas and Compass Diversified while surviving for MP and USA Rare Earth — per-ticker attrition, not one dropped day. That has since healed. All five carry 28 August again, and Novonix's bar for it has returned at exactly $3.51, the figure this page pinned when it kept vanishing. The weekly series takes each ISO week's last available close, which absorbs this without shifting a week; where it removes a Friday, that week ends on the Thursday instead. Where a vendor's history changes underneath you, the fix is to record what you verified, not to re-derive it each run.

4 Sep 2026: a continuous futures series that is not continuous. This page has priced gold off GC=F, Yahoo's front-month gold contract, to sanity-check Perpetua's moves. That series silently rolled: GC=F now resolves to Gold Dec 26, and its own bar array still carries $4,366.3 for 2 September — the expiring contract — while the December contract closed that session at $4,414.6. Differencing across the roll would have reported a +4.0% gold session on 3 September against +1.9% for the bullion ETFs, which agree with each other to four hundredths of a point (SPDR Gold Shares +1.85%, iShares Gold Trust +1.88%). A futures move measured across a contract change is a spread, not a return. Gold figures on this page are now taken from the spot-tracking ETFs, which also settle on the same 16:00 ET clock as Perpetua and the miners they are being compared with — the earlier $4,366/oz reference has been dropped for the same reason.

Correlations use 104 completed weekly returns bucketed by ISO calendar week so Tokyo, Xetra and New York lines align despite different trading calendars. Weekly rather than daily specifically to avoid the time-zone lag that inflates or deflates cross-market daily correlation. The window runs to the completed week ended 25 Sep 2026 (ISO week 39); it was extended from 53 weeks on 14 Aug 2026, which shifted several tier-two figures down by 0.10–0.20 without changing any conclusion. The basket is equal-weighted and rebalanced weekly — the basket return for a week is the mean of the six tier-one names' returns for that week — and stating that is not pedantry, because the same six names held without rebalancing give 0.3877 against the rebalanced 0.3581 on the current window. This page published 0.41 through 16 Sep 2026 without naming the construction, which made the figure impossible to rebuild from this note; the claim audit carries the full account. Every figure is cross-checked against a second bucketing method before publication, and on this run the two agreed to four decimal places on every series. The window has not moved for two runs. ISO week 39 closed on Sunday 27 September, so Monday's refresh advanced the end to the week ended 25 September, and Tuesday's and Wednesday's both sit inside week 40 and add nothing: the end will next advance on the first refresh after Sunday 4 October. Every correlation on this page is therefore identical to Monday's, which is a property of the window rather than a coincidence of the tape, and is the reason the figures below are quoted rather than recomputed as news. On the current window the figures are basket-to-REMX 0.3581, Schaeffler 0.5909 to the basket and Lynas 0.6225 to REMX. This run both bucketing methods were recomputed from scratch on fresh data and agreed to within 0.010 across all fourteen series — not to four decimals as in previous runs, and the reason is worth stating: the native-weekly method's own window ends one ISO week later than the daily-rebucketed one, so the two are no longer measuring an identical span. Agreement inside a hundredth across every series is the confirmation; identical decimals would have been the wrong thing to expect. That is the reason a window that moves has to be re-read everywhere it is quoted rather than sampled in one place. A correction to this note while we are here: it previously said a Saturday refresh is the only one that can advance the window's end. It cannot. ISO weeks run Monday to Sunday and the in-progress week is excluded, so Saturday's run still sits inside the current week and adds nothing; the end advances on the first refresh after a Sunday, which on an ordinary schedule means Monday's. The start, separately, rolls forward on its own, which was the lesson of 16 Sep 2026. There is a request-shaped trap underneath all of it: a two-year daily request spans 105 ISO weeks including the in-progress one, which after excluding it yields 103 weekly returns, not 104. Anchoring a true 104-return window needs a three-year request, and that is how the figures here are built. The four-week comparison between the tiers uses a different construction again, and it is now stated: the basket's 1m figure is the mean of the six tier-one names' own 1m cells — equal-weighted, not rebalanced, each name on its own venue's 30-day lookback — so a reader can rebuild it from the table above. This page previously quoted 5.2% for that figure and it cannot be reproduced on any construction tried; the claim audit carries that too. Correlation measures co-movement, not causation — treat 0.36 as "these travel together loosely," not as a precise constant.

A correction worth repeating, and a bigger one below it. Schaeffler's correlation to the robotics basket was originally computed on the SFFLY ADR and came out at 0.16. On the liquid Xetra line it is 0.60. Thin ADRs do not merely lag — they can invert a conclusion. Every correlation on this page now uses the primary listing.

18 Aug 2026 correction: the alignment bug. Every correlation figure this page had published through 17 Aug 2026 was computed from Yahoo's native weekly bars (interval=1wk). Those bars anchor Tokyo and Xetra weeks roughly one calendar week off from New York's — confirmed directly by comparing native bars against daily closes re-bucketed into true ISO weeks, which showed a consistent one-week offset for every Tokyo and Xetra ticker tested but not for US tickers. Because the tier-one basket is four-sixths Japanese names, this silently corrupted every cross-region figure: the robotics basket's correlation to REMX read 0.19 on the misaligned data and about 0.40 once daily closes were re-bucketed by calendar week (0.36 on the current window, weekly-rebalanced) — confirmed by two independent methods (ISO-week bucketing and Friday-anchored resampling) that agree to three decimal places. Correlations computed entirely within one region (e.g. TDK, a Tokyo name, against the mostly-Tokyo basket) barely moved, which is exactly what a same-direction shift on both sides of a comparison would produce, and is why the bug went unnoticed until a cross-region figure was checked against an independent method. Every correlation on this page, in every table, chart and paragraph, is now computed from daily closes re-bucketed into ISO calendar weeks.

Use the primary listings. The ADRs quoted in the source post are thin: HSYDF traded 200 shares in a session, YASKY 513, NCTKY 1,350. NJDCY has not printed since February. Prices on those lines can sit stale for days and will not reflect Tokyo. Where an ADR is the only access route, expect a spread.

Not investment advice. This is a research snapshot assembled from public filings, company releases and press reporting, built to check a social-media thesis rather than to endorse it.

09 Sources
Milk Road AI — humanoid supply chain post (9 Aug 2026)
Ambarella — CV7 launch, CES 2026
Ambarella — FY2026 results
Schaeffler — Hexagon Robotics partnership
The Robot Report — Schaeffler robot deployment
Investing.com — Nidec results delay and probe
Nidec — internal control investigation overview
Nidec — receipt of the third-party committee’s final report on accounting (17 Apr 2026)
Nidec — Q1 FY3/27 disclosure beyond 45 days (5 Aug 2026)
Nidec — shareholder request to file action (5 Aug 2026)
Nidec — second, joint shareholder request to file action (21 Aug 2026)
Nidec — annual securities report filing deadline extended to 30 September 2026
USA Rare Earth — completion of the Serra Verde combination (3 Sep 2026)
Ambarella — Citi Global TMT Conference remarks (9 Sep 2026)
Nikkei — Nidec limit-down, −¥500 (17.60%) to ¥2,340 on the impairment report (28 Sep 2026)
Bloomberg — Nidec’s statement: executive changes and large-scale impairment under consideration, nothing decided (28 Sep 2026)
Kyodo — Nidec considering large-scale impairment and management changes (28 Sep 2026)
Nikkei — the earlier “several hundred billion yen” impairment report (15 Sep 2026)
Ambarella — Developer Zone on Google Cloud, dated 15 Sep 2026, not 25 Sep
Niron Magnetics — first steel at Sartell and a Honda investment (10 Sep 2026)
Nidec — receipt of notification of litigation on derivative action, Kyoto District Court case 1749 of 2026 (10 Sep 2026)
24/7 Wall St — rare earths attributed to “U.S.–China thaw hopes” (10 Sep 2026)
CSIS — the 2026 Trump–Xi summits, including the 24 September Washington visit
USA Rare Earth — groundbreaking at Blacksburg, South Carolina: 6,400 tpa NdFeB, ~$1.2bn (9 Sep 2026)
Reuters via Mining.com — Chinese rare-earth firms halt some US shipments after the RBA sanctions (4 Sep 2026)
Rigzone — Brent +6.3% to $107.63 on Hormuz shipping attacks (10 Sep 2026)
Nikkei Indexes — Nikkei 225 daily close
Jefferies — Schaeffler target cut to €8.70 from €9.45, Buy retained, analyst Vanessa Jeffriess (23 Sep 2026)
Jefferies — the earlier Schaeffler cut, €10.45 to €9.45 (5 Aug 2026)
Schaeffler −2.24% on the session of the Jefferies cut (23 Sep 2026)
NBC News — Bessent: the Busan Agreement extended from 10 November to 10 January (23 Sep 2026)
Reuters via Investing.com — Bessent and He Lifeng meet before the summit; truce extension, 11:40 ET (23 Sep 2026)
Investing.com — Asian rare-earth names fall after the truce extension; Lynas −2% (24 Sep 2026)
Bloomberg — China’s magnet exports to the US fall 21% to 512 t in August, on customs data (21 Sep 2026)
SMM — China’s total rare-earth magnet exports 5,010 t in August, −6% MoM, −18% YoY
USAGOLD — hawkish Fed remarks, dollar index back above 100, metals liquidation (23 Sep 2026)
Nidec — receipt of the Investigation Committee’s report, publication set for 4 September (2 Sep 2026)
Nidec — disclosure of the quality Investigation Report and the company’s response (4 Sep 2026)
Nidec — response to suspected quality-related misconduct
News On Japan — Nikkei −3.2% on AI selling and bond yields (19 Aug 2026)
24/7 Wall St — robotics names in the 18 Aug AI selloff
Antimony spot price and year-to-date change
Shanghai Metals Market — Pr–Nd oxide benchmark
EE Times — Nidec gear design for humanoids
Investing.com — Harmonic Drive humanoid orders
JPX/TDnet — Harmonic Drive earnings forecast revision
Harmonic Drive — FY3/27 forecast raised to ¥74.5bn / ¥8.5bn (7 Aug 2026)
MP Materials — DoD partnership (Jul 2025)
MP Materials — Q2 2026 results
MP Materials — 10X site selection, ~10,000 t total capacity
CNBC — Pentagon stake in MP Materials
Nikkei Asia — 15% polysilicon tariff
MINING.COM — China blacklists MP and USA Rare Earth
MINING.COM — USA Rare Earth pulls timeline forward
USA Rare Earth — Stillwater Phase 1a commissioning
USA Rare Earth — Q2 2026 results, cash position, CEO transition
USA Rare Earth — 8-K, TMRC acquisition closing (7 Aug 2026)
USA Rare Earth — Serra Verde definitive agreement
USA Rare Earth — 8-K, $1.55bn SPV capitalisation for Serra Verde offtake (24 Aug 2026)
The Motley Fool — MP Materials Q2 2026 earnings call transcript (gadolinium deal)
Lynas — US project updates
Lynas — Q3 FY26 record revenue
Lynas — FY26 results and heavy rare-earth capex escalation (26 Aug 2026)
Rare Earth Exchanges — Lynas Texas project status
CNBC — Perpetua secures $2.9bn EXIM loan
MINING.COM — Perpetua breaks ground at Stibnite
Novonix — $103m 48C tax credits certified
Novonix — divesting non-core business
Novonix — 6-K, one-for-ten ADS ratio change for Nasdaq compliance (12 Aug 2026)
Novonix — ASX half-year accounts and Appendix 4D, going-concern material uncertainty (31 Aug 2026)
Niron Magnetics — $150m Department of War commitment
Northern News Now — Niron Sartell plant
Arnold Magnetic — USA Rare Earth distribution agreement
Compass Diversified — Q2 2026 results, Sterno sale, Arnold segment, CEO transition
The Motley Fool — Compass Diversified Q2 2026 earnings call transcript
Compass Diversified — completion of restatement
Investing.com — CODI restated financials after Lugano fraud
Bain Capital — Hitachi Metals tender offer close
MarkLines — Hitachi Metals renamed Proterial
TDK — magnet product range
TDK as an NdFeB manufacturer — profile
SCMP — defence mineral supply chain order
CSIS — critical minerals executive order analysis
Rare Earth Exchanges — China price index, Aug 2026
S&P Global — rare earth supply bottlenecks 2026
Rare Earth Exchanges — humanoids and magnet control
Seeking Alpha — REMX composition analysis
VanEck — REMX holdings & performance
Yahoo Finance — Nikkei 225 chart data, checked against index closes each run
Yahoo Finance — Nomura Nikkei 225 ETF (1321.T), used to cross-check the index print
Yahoo Finance — Nikko Nikkei 225 ETF (1330.T), the second cross-check on the index print
Reuters — Japan’s 10-year JGB yield reaches 3%, first since 1996 (1 Sep 2026)
Novonix — land purchase dropped and Riverside ramp slowed, per the half-year report
Ambarella — Q2 FY2027 financial results (3 Sep 2026)
News On Japan — Nikkei +2.12% to 66,399.84 on a chip-led rebound (7 Sep 2026)
Sunday Guardian — the mid-session 8 September Nikkei figure corrected in the claim audit
Sunday Guardian — the mid-session 14 September Nikkei figure corrected in the claim audit
Business Recorder — Reuters Japan wrap, 14 Sep 2026: the Topix/Nikkei split, and a second morning index level
FinanzNachrichten — Schaeffler Xetra order book, used for the 7 September close
finanzen.net — Schaeffler daily price history, cross-check for the German feed gaps
Yaskawa FY2026 earnings commentary
Nabtesco FY2025 results breakdown
Federal Reserve — FOMC statement, 16 Sep 2026: first hike since 2023, to 3.75–4.00%
Nikkei 225 at 65,018.95 after the Bank of Japan decision, and Tokyo shut for the holiday run
CNBC — US-listed Greenland names surge after the Denmark security deal (21 Sep 2026)
Al Jazeera — what the Greenland security agreement does and does not cover
24/7 Wall St — the intraday USAR and MP figures corrected in the claim audit
The USAR-has-no-Greenland-assets point, made contemporaneously
Robotics watchlist — component, minerals and magnet layers. Compiled 30 September 2026 from public filings, company releases and press reporting. Prices are delayed closes, not live quotes. Research notes only; not investment advice.