Marvell Technology plunged 40%, while Adobe surged 27%, delivering a brutal two-sided blow to both long and short positions. The fund employed a 4x leveraged long-short strategy, wiping out its entire equity base in less than six weeks.

Two days before Goldman Sachs, JPMorgan Chase, and Bank of America issued margin calls and forced liquidations to the fund's manager, Jim Cramer had already advised investors to exit all leveraged bets on data center stocks. On the morning of July 28, 2026, Cramer urged viewers on CNBC to sell any borrowed-money positions in the data center sector: "If you've borrowed to bet on data center stocks, by 9:30 tomorrow morning, close them all, win or lose." The day prior, he posted on X that the intraday reversal in the chip sector was difficult to reverse, with many holders forced to sell, driven by immense and motivated selling pressure, much of it leveraged with margin.

Two days later, on July 30, Wall Street's most-watched AI hedge fund declared the complete demise of its public equity investment vehicle. Jim Cramer's Situational Awareness LP, managed by 24-year-old former OpenAI researcher Leopold Aschenbrenner, faced margin calls from three prime brokers—Goldman Sachs, JPMorgan Chase, and Bank of America—forcing the fund to liquidate all its public stock holdings, valued at over $10 billion. These assets were ultimately acquired by Ken Griffin's Citadel.

The Prodigy Manager's Background

Aschenbrenner entered Columbia University at age 15, graduating in 2021 as the top student in his department with dual degrees in Economics, Mathematics, and Statistics. He later conducted long-term risk research at Oxford University's Global Priorities Institute before joining OpenAI's superalignment team. In April 2024, the company terminated him, citing suspected information leaks, a claim he disputes. In June 2024, he published an article titled "Situational Awareness: The Decade Ahead," predicting a high likelihood of AGI arriving around 2027. The piece went viral, gaining him fame even before managing any external funds. The fund officially launched in late 2024, initially raising several hundred million dollars from investors including Stripe's Patrick and John Collison, former GitHub CEO Nat Friedman, and investor Daniel Gross.

By this summer, the fund's assets under management peaked at nearly $45 billion. Since its inception, returns exceeded 1000%, with a staggering 439% gain in the first half of 2026 alone. The investment strategy was clear: go long on AI infrastructure hardware companies like SK Hynix, and short on legacy software giants like Adobe, with the entire portfolio leveraged approximately 4x.

The Strategy's Complete Collapse: A Two-Sided Blow

Both sides of the trade reversed simultaneously, blowing through expectations. From June 22 to July 30, Marvell Technology plummeted 40.44%, as the entire AI networking chip sector reversed course. During the same period, Nvidia shares fell 6.52% to $195.04, dragging the long hardware portfolio lower, and the fund's top long holding, SK Hynix, also declined. The losses on the short side were even more devastating. From June 22 to July 30, Adobe shares surged 27.19% to close at $247.90. The company reported record Q2 revenue of $6.62 billion, with AI-related annual recurring revenue doubling year-over-year to exceed $500 million. Marvell's performance highlights the market divergence: despite its recent sharp decline, the stock is still up 116.01% year-to-date. On July 29, the VIX volatility index spiked 13.5% to 20.66, a classic sign of massive forced liquidations.

With 4x leverage, the roughly 40% decline in longs and 27% surge in shorts caused losses that wiped out the fund's entire capital base. The prime brokers initiated forced margin liquidations, and Citadel took over the entire portfolio.

Remaining Assets and Future Watch Points

The Situational Awareness fund has not completely dissolved. Its private holdings, including an approximately $5 billion stake in AI company Anthropic, were preserved. The fund will now operate solely as a private asset vehicle, no longer engaging in public equity investments. On July 30, Cramer commented on the blow-up, calling it an exposure of the massive risks of leverage, reiterating his advice from the past two weeks: "Unload your leverage, stop borrowing to buy stocks." This risk lesson is more precise than its headline suggests. Nvidia raised its Q2 revenue guidance to $91 billion, Marvell's data center business continues to grow, and Adobe upgraded its full-year outlook. The real collapse wasn't the AI sector itself, but the 24-year-old manager's operating model: holding $45 billion in assets, heavily concentrated with 4x leverage, betting that long and short positions wouldn't experience opposing extreme moves in the same month—only to have that exact scenario play out.

Two key points to watch going forward: First, whether other multi-strategy hedge funds employing similar "long AI infrastructure, short legacy software" pairs trades will quietly reduce their overall portfolio exposure in August. Second, whether Citadel's ability to absorb such a large portfolio suggests that the risk shock is contained and unlikely to spread.