Aschenbrenner's AI fund loses $35bn as margin calls force firesale
A heavily leveraged bet on semiconductor stocks by Leopold Aschenbrenner's hedge fund Situational Awareness unraveled, wiping out $35 billion in assets and forcing a distressed sale to Citadel that rippled across global markets.
Leopold Aschenbrenner’s hedge fund Situational Awareness has seen its assets plummet from $45 billion at the start of July to roughly $10 billion. The rapid destruction of capital was triggered by a sharp decline in semiconductor stocks, which ignited a cascade of margin calls on the firm's heavily leveraged positions. To stop the bleeding, Aschenbrenner was forced to liquidate his leveraged equity bets at a discount to Ken Griffin’s Citadel.
The fund's downfall was accelerated by the withdrawal of its prime brokerage backing. Banks including Goldman Sachs, JPMorgan Chase, and Bank of America had previously extended leverage of four to five times the fund's capital, buoyed by Situational Awareness's cumulative gains of more than 1,000% since inception. As technology stocks began to slide in recent weeks, those same lenders proved unwilling to extend further credit. Barclays Plc had already rejected the fund's overtures for additional financing due to concerns over its extreme concentration in a single sector.
The forced liquidation transmitted shockwaves beyond the fund itself, contributing to a broader sell-off across global markets on Wednesday. The sudden dumping of holdings in names like SK Hynix and CoreWeave left market participants scrambling to identify the source of the pressure. “There had to be something else behind it. And, now we see what happened,” said Vuk Vukovic, chief investment officer at Oraclum Capital.
The collapse underscores the latent dangers of crowded, leveraged trades in the artificial intelligence sector. While the long-term trajectory of AI remains a subject of intense debate, the episode highlights how rapidly liquidity can evaporate for concentrated funds when momentum reverses. “This blow-up as a matter of not if, but when,” noted Jerry Diao, who runs a Wall Street coaching firm. “Maybe Aschenbrenner's views on AI are correct in the long run, but in the public markets, you have to be prepared for the short-term.”
Aschenbrenner acknowledged the role of short sellers in accelerating July's losses but took ultimate responsibility for the fund's positioning. In a letter to investors late Thursday, he described the difficulty of managing risk as market liquidity vanished.
“We worked to keep the portfolio within our risk parameters, but gradually this became more difficult as positions rapidly moved against us and market liquidity dried up,” he wrote. “We took the steps that were necessary to fight another day.” Moving forward, he vowed to operate his public equity portfolio without leverage “while we draw the lessons from these developments.”
