Michael Burry Shifts AI Short Bet to NDX and Semiconductor ETF Puts

Michael Burry's New AI Short: From Single Stocks to Index Puts

Michael Burry, the investor famous for shorting the US housing market before the 2008 financial crisis, has restructured his bearish bet against artificial intelligence stocks. In a Substack post on October 11 titled 'Consolidating the Big Short,' Burry revealed that he has moved most of his previous options positions into two broad short bets: put options on the Nasdaq-100 index (NDX) and put options on the VanEck Semiconductor ETF (SMH).

Burry had earlier this year disclosed short positions against individual AI-linked stocks such as Nvidia and Palantir. Those bets likely profited over the summer when semiconductor shares came under pressure from valuation concerns and other headwinds. Now, he is concentrating his wager on two baskets that track the broader AI-driven rally, rather than picking individual companies.

The SMH ETF is heavily concentrated in the largest semiconductor firms: Nvidia accounts for 19.6% of the fund, Taiwan Semiconductor 9.3%, and Advanced Micro Devices 5.6%. Broadcom, Micron, Marvell, and Applied Materials each hold close to 5%. Burry described the ETF as 'a concentrated bet on the hottest and most overbought semiconductor stocks' and said it fits squarely within the companies he wants to short.

Burry also stated that he expects a 'significant peak' in the market within the next nine months and warned that the final stage of the bull run could be 'wild,' with potentially rapid price increases before his anticipated correction. His put options expire in June 2027, giving him roughly eight months to see his thesis confirmed. He continues to hold direct put options on Oracle, Palantir, MetLife, and Caterpillar, noting that Palantir's rising price on declining volume suggests 'growing exhaustion' in the stock.

What Burry's Shift Signals About AI Trade Positioning

Why Burry Is Betting on the Index, Not Just Nvidia

Burry's shift from single-stock shorts to index and ETF puts reflects a broader thesis: that the entire AI-driven market rally is vulnerable, not just a handful of names. By targeting the NDX and SMH, he gains exposure to a wide swath of semiconductor and AI-related companies without needing to pick the exact winner or loser. The SMH ETF's concentration in Nvidia, TSMC, and AMD means his bet is still heavily tied to the same companies he shorted before, but with less idiosyncratic risk.

The Timing and the 'Wild' Final Rally

Burry's nine-month horizon for a market peak and his June 2027 option expiry suggest he is prepared for the rally to continue longer than many bears expect. His warning that the final leg could be 'wild' implies he anticipates a blow-off top — a rapid, sentiment-driven surge before a sharp reversal. This is a common pattern in speculative bubbles, where prices accelerate before collapsing. Investors should note that Burry's thesis is not that AI is unimportant, but that current valuations are unsustainable.

What This Means for the AI Trade

Burry's consolidation into index puts is a signal that he sees systemic risk in the AI trade, not just company-specific issues. If he is right, a correction could hit a broad range of tech and semiconductor stocks, impacting not only Nvidia and AMD but also the many funds and retail investors heavily exposed to the sector. However, his track record, while notable for the 2008 call, includes other bets that took time to pay off or did not materialize as expected. His June 2027 expiry gives him a long runway, but also highlights the uncertainty of timing a market top.

Palantir and Other Direct Shorts

Burry's continued direct shorts on Oracle, Palantir, MetLife, and Caterpillar show he still sees specific vulnerabilities. His comment on Palantir — that volume is falling while the stock rises, suggesting exhaustion — is a technical observation that may resonate with traders watching for signs of a reversal. However, these are individual bets that carry higher risk than index puts.

Key Takeaways for Investors Watching the AI Trade

Burry's shift to index and ETF puts signals that the most prominent bear on AI is now betting against the entire sector, not just individual names.

• For investors with AI exposure: Review your portfolio's concentration in semiconductor and AI-linked stocks. The SMH ETF's top holdings — Nvidia (19.6%), TSMC (9.3%), AMD (5.6%) — are widely held across many funds and retail accounts. A broad correction could impact diversified tech portfolios more than expected.
• For traders: Burry's June 2027 option expiry gives a clear timeline for his thesis. Watch for signs of a blow-off top in the Nasdaq-100 and semiconductor stocks, such as accelerating price gains on declining volume, which Burry cited for Palantir.
• For long-term investors: Burry's warning of a 'significant peak' within nine months is a reminder that AI valuations are stretched. Consider whether your investment horizon can withstand a potential 20-30% drawdown in tech stocks, and whether rebalancing is appropriate.
• Metrics to watch: Nvidia's next earnings report, SMH ETF fund flows, and the NDX's price-to-earnings ratio relative to historical averages. Also monitor Palantir's trading volume for further signs of exhaustion.