Lone Pine Capital, which manages approximately $19 billion, saw its flagship Cypress hedge fund surrender virtually all of its 44% year-to-date gain by the end of September, finishing up just 0.6% after aggressive bets on artificial intelligence stocks unraveled.
Key Takeaways:
- Cypress Fund Drop: After climbing 44% through June, the fund fell nearly 25% in July, leaving YTD gains at 0.6% by September.
- Heavy AI Concentration: Lone Pine bought five of its seven largest U.S. stock holdings in Q2, making up about 40% of its U.S. portfolio.
- Major Holding Losses: Dutch AI computing firm Nebius Group fell nearly a third in July, while Applied Materials dropped 29%.
- Short Bets Failed: Short positions designed to profit from stock declines also lost money during the quarter.
- Diverging Investor Views: Former OpenAI researcher Leopold Aschenbrenner re-entered AI stocks, while Michael Burry bought put options against Nebius Group.
Tech Sector Rout Erases Three Quarters of Gains
Prior to the third-quarter drawdown, Lone Pine Capital had recorded double-digit annual gains for three consecutive years. However, severe market volatility in July delivered a 25% loss to the Cypress fund. The decline coincided with a broader selloff in tech equities, compounding pressures caused by geopolitical tensions involving Iran and a sharp spike in crude oil prices.
During the second quarter, the firm established massive positions in technology firms, building five of its seven largest U.S. equity stakes to account for nearly 40% of its U.S. portfolio. Its top position was Nebius Group, a Dutch company that rents out AI computing power, in which Lone Pine held approximately $1.18 billion. The stock plummeted nearly a third in July.
Other key holdings sustained heavy declines, including chipmaking machinery manufacturer Applied Materials, which sank 29%, alongside pullbacks in ASML, AppLovin, Corning, and Home Depot. The fund's short sales—bets on declining share prices—also posted negative returns. Commenting on the performance, stock trader Negligible Capital noted, "Lone Pine gave it all back after being up 44% through the first half of the year. Gotta be real tough to explain this to the LPs." Institutional portfolios remain sensitive to sudden sector rotations as macro conditions evolve, similar to how markets adjust when the Fed signals potential interest rate freeze.
High-Stakes Division Among Prominent Investors
Lone Pine is not the only high-profile institutional investor affected by sharp shifts in artificial intelligence equities. In July, AI positions severely impacted former OpenAI researcher Leopold Aschenbrenner's hedge fund, though he subsequently bought back into AI stocks as tech firms expand infrastructure and battle for ICANN web domains.
Conversely, Michael Burry, the investor featured in "The Big Short," has positioned himself against the current AI trade. Burry holds put options targeting Nebius Group—Lone Pine's largest AI position—which profit if the stock price drops. On September 28, Burry commented on his shift, writing, "Fundamentally, I am moving timelines up."
Why It Matters
Lone Pine’s steep Q3 reversal illustrates the heightened risk profile of concentrated thematic trades in mega-cap AI and semiconductor infrastructure. As institutional capital pours into tech hardware and computing platforms, sudden shifts in valuations can quickly erode multi-quarter outperformance. Investors should monitor whether hedge funds pivot away from hardware supply-chain plays toward defensive sectors or short-side macro hedges in response to ongoing market volatility.
