Ex-OpenAI Researcher's $45B AI Hedge Fund Collapses in Days

Situational Awareness, the hedge fund founded by former OpenAI researcher Leopold Aschenbrenner, rapidly grew to $45 billion in assets on the back of aggressive AI-themed bets. Last week, however, a sharp momentum reversal across equities triggered margin calls, forcing the fund to dump public stock holdings in a rush. Even though the broader market stayed relatively calm, the fund's concentrated exposure to specific AI trades led to catastrophic losses. The episode is now seen as one of the most dramatic examples of how quickly even a large, well-capitalized fund can unravel when timing goes wrong. It's a cautionary tale for retail investors about the dangers of over-concentration, even in hot sectors like AI.