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SOXX Falls 2.1% as Burry Converts AI Shorts to Levered Puts
Why is SOXX falling today?
iShares Semiconductor ETF (SOXX) fell 2.1% to $562 on Tuesday after Michael Burry converted his AI short positions to levered put options on Micron, Palantir, Nebius, and SOXX, citing a near-record CAPE ratio of 42.56.
Key numbers
| Burry put notional (prior disclosure, Sep 17) | ~$1.1B50,000 PLTR contracts ($912M) + 10,000 NVDA contracts (~$186.6M) [3] |
|---|---|
| CAPE ratio (Burry-cited figure) | 42.56+144% above the 156-year average of 17.40 [4] |
| 1999 all-time CAPE peak | 44.19Only 3.9% above the Sep 2026 reading [5] |
| Ares AI financing web (mapped by Burry) | $573B26 disclosed deals over prior 12 months [2] |
| Micron (MU) year-to-date gain | +276%NBIS +175%, SOXX +100%, PLTR +0.34% YTD [1] |
| Nvidia H100 GPU residual value | -51%decline over three years, per Ares research [2] |
What happened
iShares Semiconductor ETF (SOXX) fell 2.1% to $562 on Tuesday after Michael Burry converted his AI short positions to levered put options on Micron, Palantir, Nebius, and SOXX, citing a near-record CAPE ratio of 42.56. Burry announced the shift via his Substack newsletter, saying the AI bubble may burst "sooner than later" and describing Nebius as "what the top of a boom looks like". He cited Ares Management research mapping $573 billion in AI financings across 26 deals, warning the entire web assumes unproven revenue that could trigger cascading guarantees if spending slows. Micron (MU) fell 2.8% and Nebius (NBIS) dropped 2.3%, though both stocks remain up 276% and 175% year-to-date.
Why it matters
SOXX and the broader AI chip sector matter to ordinary investors because they represent some of the biggest stock gains of the past three years — gains that look fragile if Burry is right. The CAPE ratio at 42.56 means U.S. stocks are priced nearly 2.5 times their long-run average, a level last exceeded only at the 1999 dot-com peak. Behind the share prices sits a $573 billion AI financing web that could unravel if the revenue those deals count on never arrives.
Who this affects
- MarketbearishMedium impact
- AI chip stocks and semiconductor ETFs fell broadly on Tuesday.
- CompanybearishMedium impact
- Micron, Palantir, Nebius face renewed selling pressure from Burry's levered bet.
- CompetitorsmixedLow impact
- Nvidia rose 1.7% Tuesday while AMD and SMH fell alongside Burry's targets.
- IndustrybearishHigh impact
- AI sector faces bubble scrutiny as a high-profile investor upgrades his bearish wager.
SOXX vs Micron, Palantir, Nebius
How we got here
247WallSt flags CAPE at 42.56, near 150-year record; Burry warns of bubble.
Burry discloses ~$1.1B in puts: 50,000 PLTR contracts, 10,000 NVDA contracts.
Burry posts Substack: converts all direct AI shorts to levered puts, cites Ares $573B web.
SOXX -2.1%, MU -2.8%, NBIS -2.3%, PLTR -1.6% at Tuesday open.
What to watch
- Hyperscaler Q3 2026 earnings: Microsoft, Alphabet, Meta AI capex guidance.Q4 2026
- CAPE ratio: a move to 44.19 would break the 1999 all-time record.Q4 2026
- CoreWeave (CRWV): Burry sought puts but could not acquire at attractive pricing.Q4 2026
Educational content only. Not investment advice.
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