Michael Burry expands short bets on Micron, Nebius, SOXX, Palantir citing memory glut fears
Investor Michael Burry, known for his 2008 housing market short, disclosed on Substack on September 22 that he has significantly increased short positions against Micron Technology, Nebius, the iShares Semiconductor ETF, and Palantir Technologies, describing the moves as "quite large." Burry cited Acer CEO Jason Chen's warning that rising memory chip production in China could ease supply constraints and pressure prices by late 2027. Burry argues the current memory shortage is a supply-side dislocation from manufacturers shifting capacity to AI-focused HBM, not structural demand growth, and expects the supply-demand gap to narrow as normal DRAM production recovers.
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- Reports are grouped by semantic similarity and deterministic rules. Language models may assist titles, summaries, translation and cross-source analysis; the page reads the event directly, while its address stays stable when the title changes.
- Summary covers the current reports
Cross-source coverage
Common ground
- Chinese memory production from CXMT and YMTC is real and will put downward pressure on standard DRAM prices.
- Michael Burry's short position on Micron is relatively small—around $50 million against a $100 billion market cap—so it's more of a hedge than a massive bet.
- The memory market is splitting into two speeds: high-bandwidth memory for AI and standard DRAM, which most investors are still treating as one market.
- Burry's supply-side logic—that a glut from new capacity will hurt margins—is technically sound in the short term.
Points of contention
- Neutral Agent says the trade is just about P&L mechanics, while Eastern and Regional Agents argue the narrative amplification and geopolitical context matter more than the position size.
- Eastern Agent believes Chinese memory makers will produce at a loss for years to achieve supply chain security, but Neutral Agent counters that state backing isn't infinite and can destroy their own capital.
- Regional Agent frames workers in Boise and Xi'an as symmetrical victims of the same dynamic, while Eastern and Neutral Agents say one group is losing a privilege and the other is building a capability under sanctions.
- Eastern Agent insists US export controls and tariffs are central to the market, but Neutral Agent argues tariffs don't fix oversupply—they just shift who gets hurt.
Blind spots
- All participants focused on investors and companies but largely ignored the human cost for workers and consumers who will pay more for electronics due to tariffs and price wars.
- The debate assumed historical patterns for memory cycles apply, but no one fully addressed how unprecedented government intervention on both sides changes the rules.
- No one discussed how the narrative from a famous short seller like Burry could influence trade policy, even if his actual bet is small.
WorldAttention’s read
The roundtable agreed that Michael Burry's short bet on Micron is based on a real supply glut from Chinese memory makers, but they disagreed on whether that makes it a smart trade. Neutral Agent sees it as a tactical hedge on market segmentation—shorting standard DRAM while AI demand for high-bandwidth memory holds up. Eastern Agent argues Burry is ignoring that Chinese companies are state-backed and will produce at a loss for years to achieve supply chain security, making his supply-demand models a category error. Regional Agent adds that the real story is the human cost for workers and consumers caught in a technological cold war, which both sides overlooked. Ultimately, the memory market is becoming a two-speed, geopolitically charged industry, and most investors haven't priced that in yet. Burry may be early, not wrong, but being early in a momentum-driven market can look like being wrong for a long time.
Reporting timeline
Michael Burry Increases Short Bets on Micron and AI-Related Tech Stocks
Investor Michael Burry, known for betting against the housing market before the 2008 crisis, has increased his short positions on several technology stocks, including memory chip maker Micron Technology, cloud service provider Nebius, the iShares Semiconductor ETF, and data analytics firm Palantir. Burry disclosed the move on Substack on September 22, describing the positions as 'quite large.' He cited comments from Acer CEO Jason Chen, who warned that increasing memory chip production in mainland China could ease supply constraints and pressure prices by late 2027. Chen noted that memory inventories are accumulating as Chinese suppliers ramp up output, challenging the prevailing view of a prolonged chip shortage. Burry's skepticism toward the AI and semiconductor boom dates back to late 2025, when his firm held put options on Nvidia and Palantir. He has since expanded his bearish stance, shorting Nvidia, Applied Materials, and the iShares Semiconductor ETF, and extending SOXX put options to March 2027. Chinese memory manufacturers CXMT and YMTC are actively expanding production, adding supply to the global market constrained by AI demand. Burry's core question is whether storage industry capacity expansion will eventually catch up with demand.
Read sourceMichael Burry Discloses Large Increase in Short Positions on Micron, Nebius, and Palantir
Michael Burry, the investor known as 'The Big Short,' disclosed on his Substack platform that he has significantly increased his short positions against several technology and semiconductor-related assets. The positions include a substantial short bet against memory chip giant Micron Technology, cloud computing provider Nebius, the iShares Semiconductor ETF, and data analytics firm Palantir. Burry emphasized that the scale of this new short-selling operation is 'quite large.' The disclosure, reported by Chinese financial media outlet 财联社 on September 23, provides a rare public glimpse into the current bearish bets of a prominent hedge fund manager known for profiting from the 2008 financial crisis. The specific rationale behind the increased short positions was not detailed in the report.
Read sourceMichael Burry Discloses Large Short Positions on Micron, Nebius, and Palantir
Michael Burry, the investor known as 'The Big Short,' disclosed on his Substack platform that he has significantly increased short positions against several technology and semiconductor-related assets. The positions include Micron Technology, a major memory chip manufacturer; Nebius, a cloud computing services provider; the iShares Semiconductor ETF; and Palantir Technologies, a data analytics firm. Burry emphasized that the scale of this operation is 'quite large.' The disclosure, made on September 23, highlights Burry's bearish outlook on these specific sectors and companies, though no specific reasoning or price targets were provided in the report.
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Michael Burry Adds to Short Bets on Micron, Semiconductors After Acer CEO Warns of Memory Glut
Investor Michael Burry has increased his short positions against Micron Technology, Nebius, the iShares Semiconductor ETF, and Palantir, describing the moves as 'quite large.' The action follows a warning from Acer CEO Chen Junsheng that increasing memory chip production in China could ease supply constraints and pressure prices by late 2027. Burry cited Chen's interview, noting that memory inventories are building and Chinese suppliers are releasing more output, challenging the prevailing view of a prolonged memory shortage. Burry argues that the current shortage of conventional memory partly results from manufacturers diverting capacity to high-bandwidth memory (HBM) for AI, but that production of standard memory is now recovering. Chinese memory makers CXMT and YMTC are actively expanding output, adding significant supply to the global market. Burry's bearish stance on AI-related stocks dates back to late 2025, when his firm held large put options on Nvidia and Palantir. He later expanded short positions across the semiconductor sector in mid-2026.
Read sourceMichael Burry Adds to Short Bets on Micron, Other Tech Stocks, Citing AI Hype Skepticism
Investor Michael Burry has increased his short positions against Micron Technology, Nebius, the iShares Semiconductor ETF, and Palantir, expressing doubt about the sustainability of the semiconductor and AI boom. In a September 22 Substack post, Burry described the moves as 'quite large.' He cited Acer CEO Jason Chen's warning that rising memory chip production in China could ease supply constraints and pressure prices by late 2027. Chen noted that memory inventories are accumulating as Chinese suppliers ramp up output, challenging the prevailing view of a prolonged chip shortage. Burry believes that traditional memory shortages are partly due to manufacturers shifting capacity to AI-focused HBM, but that production of standard memory is now recovering. Burry's bearish stance on AI and semiconductors dates back to late 2025, when his firm held put options on Nvidia and Palantir. He later expanded short positions to include Nvidia, Applied Materials, and the iShares Semiconductor ETF, and directly shorted Micron at around $1,051 per share. Chinese memory makers CXMT and YMTC are adding significant supply to the global market.
Read sourceMichael Burry Increases Short Bets on Micron and AI Stocks After Acer CEO Warns of Memory Glut
Prominent investor Michael Burry has increased his short positions against memory chip maker Micron Technology, cloud service provider Nebius, the iShares Semiconductor ETF, and data analytics firm Palantir, describing the move as 'quite large.' The action, disclosed on September 22 via Substack, reflects his persistent skepticism toward the durability of the semiconductor and artificial intelligence (AI) boom. Burry cited a recent interview with Acer CEO Chen Junsheng, who warned that rising memory chip production in mainland China could eventually ease supply constraints and pressure prices, with effects becoming more apparent around the end of 2027. Chen noted that memory inventories are accumulating as Chinese suppliers ramp up output, challenging the prevailing view of a prolonged memory shortage. Burry stated that Acer's observations on inventory and supply align with his own bearish outlook on the memory market. He argues that the shortage of conventional memory partly stems from manufacturers shifting capacity to high-bandwidth memory (HBM) for AI applications, but that production of 'ordinary memory' is now recovering. Burry's bearish stance on memory predates Chen's comments, having first emerged in late 2025 with put options on Nvidia and Palantir, and expanded in mid-2026 to include short positions on Nvidia, Applied Materials, and the iShares Semiconductor ETF. Chinese memory makers CXMT and YMTC are actively expanding production, adding supply to the global market. The core question for Burry is whether memory industry capacity expansion will eventually outpace demand.
Read sourceMichael Burry Increases Short Bets on Micron, Warns of Violent Sell-Off on Memory Cycle Reversal
Michael Burry, famed for shorting subprime mortgages in 2008, has increased short positions on Micron Technology, Nebius Group, the iShares Semiconductor ETF (SOXX), and Palantir Technologies, describing the positions as 'in some size.' He argues that memory chip stocks have risen to 'ridiculous levels' and warns of a 'violent sell-off' when the cycle reverses. Burry's core thesis is that the current DRAM shortage is supply-driven, not demand-driven: Samsung, SK Hynix, and Micron shifted wafer capacity to HBM for AI, squeezing DDR5 supply. As capacity returns to traditional DRAM, he expects the supply gap to close. He cites Acer CEO Chen Jun-sheng, who noted DDR4 oversupply and predicted PC prices will rise 5-20% through Q4 2026, stabilize in H1 2027, then decline in H2 2027 as ChangXin Memory Technologies ramps production. Burry also highlights reports that ChangXin has achieved >90% yield on 17nm DDR5, calling it 'significant if true.' Despite Micron's strong earnings—Q3 FY2026 revenue of $41.46B, gross margin 84.6%—Burry believes the boom signals a cycle top. He expects a rotation out of semiconductors that 'may last longer initially.'
Read sourceMichael Burry expands short bets on Micron, Nebius, SOXX, Palantir on memory glut fears
Investor Michael Burry, known for his 'Big Short' bet against the 2008 housing market, has significantly expanded his bearish positions in the semiconductor sector. In a Substack post, Burry disclosed adding to short positions in Micron Technology, AI infrastructure firm Nebius, the iShares Semiconductor ETF (SOXX), and Palantir Technologies, describing the moves as 'quite large.' The catalyst was a warning from Acer CEO Jason Chen that memory chip inventories are accumulating and new supply will hit the market, with price pressure expected around late 2027. Burry's core thesis is that the current memory shortage is not structural demand but a supply-side dislocation caused by manufacturers shifting capacity to HBM for AI. As normal DRAM production recovers and new supply comes online, he expects the supply-demand gap to narrow, pressuring prices. Despite his bearish stance, the targeted stocks rose on the day, and retail sentiment on Stocktwits remained bullish for most names, highlighting a divergence between Burry's supply-overhang logic and prevailing market optimism.
Read sourceMichael Burry expands short bets on Micron, Nebius, citing memory supply surge and price pressure
Investor Michael Burry, known for his 2008 housing market short, disclosed he has significantly expanded short positions against Micron Technology, AI infrastructure firm Nebius, the iShares Semiconductor ETF (SOXX), and Palantir. In a Substack post, Burry stated the moves are 'quite large' and were triggered by Acer CEO Jason Chen's public warning that memory inventories are accumulating and new supply will pressure prices, potentially by late 2027. Burry's core thesis is that the recent memory shortage was a supply-side dislocation, not structural demand growth, as major manufacturers shifted capacity to HBM for AI. He argues that as normal DRAM production recovers and new global supply comes online, the supply-demand gap will narrow, driving prices down. Despite the announcement, the targeted stocks rose on the day, with Micron up over 2%. Retail sentiment on Stocktwits remained bullish for most of the stocks, contrasting with Burry's bearish view. Burry previously held bearish options on Nvidia and Palantir in Q3 2025, and has been expanding his semiconductor short positions through 2026.
Michael Burry Discloses Increased Short Positions on Micron Technology and Nebius
Michael Burry, the investor known for betting against the housing market before the 2008 financial crisis (popularized in 'The Big Short'), has disclosed that he has significantly increased his short positions against two companies. According to a post on his Substack platform, Burry has added to short positions in Micron Technology, a memory chip and cloud computing semiconductor firm, and Nebius, a cloud computing company. The disclosure was reported by Chinese financial media outlet East Money, citing a report from Cailianshe. The exact size of the positions and the rationale behind the bets were not detailed in the available text.
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