Artificial intelligence has created enormous fortunes over the past two years, but it has also reminded investors that being right about a long-term trend doesn’t guarantee success. Some of the biggest winners in AI have also experienced some of the market’s most painful drawdowns as soaring valuations, leverage, and concentrated portfolios collided with increased volatility.
Investing isn’t simply about identifying the next revolutionary technology. It’s also about surviving long enough to benefit from it. Few recent events illustrate that lesson better than what reportedly unfolded inside Leopold Aschenbrenner’s AI-focused Situational Awareness hedge fund.
One Winning Investment Couldn’t Save the Public Portfolio
Aschenbrenner built a reputation for arguing that artificial intelligence would reshape the global economy, and his investment portfolio reflected that conviction. But according to reports, the structure of the portfolio — not the AI thesis itself — became the problem.
It was a striking reversal of fortune. The fund’s public equity portfolio was financed with significant leverage, as much as four times its equity. As AI stocks corrected, margin requirements forced the liquidation of those positions. Aschenbrenner was ultimately forced to sell the portfolio to Ken Griffin’s Citadel Advisors to satisfy outstanding margin obligations, leaving the fund’s limited partners with no remaining public stock exposure.
Incredibly, the fund is still reportedly showing an 80% year-to-date gain.
How is that even possible?
The answer lies in one private investment. Approximately 25% of the fund’s net asset value was invested in Anthropic, which had reportedly appreciated 620% year-to-date, largely following new financing rounds that dramatically increased Anthropic’s valuation.
As a result, Aschenbrenner’s public-equity positions — such as CoreWeave (NASDAQ:CRWV), Sandisk (NASDAQ:SNDK), and IREN (NASDAQ:IREN) — accounted for the remaining three-quarters of the portfolio and effectively lost their full value due to the margin call (a –75% contribution to overall returns). Anthropic’s 620% gain, by contrast, contributed roughly +155%. Combining the two produced a net return of about +80%.
It demonstrates how fund-level performance can mask vastly different outcomes underneath.
The Difference Between Performance And Risk
The Anthropic investment was obviously an outstanding call. A sixfold gain on a quarter of a portfolio would be enough to generate exceptional overall returns under normal circumstances.
The public portfolio tells another story. Using leverage magnifies gains when markets cooperate. It also magnifies losses when prices move against you. Once margin calls begin, investors often lose control over when assets are sold. Positions are liquidated to satisfy lenders, regardless of whether the long-term investment thesis remains intact.
Ironically, the fund may have been directionally correct about AI while still suffering catastrophic losses because of portfolio construction.
As Aschenbrenner himself has noted, “Obviously, not blowing up is task number one and two…You have to get the timing right.”
Concentration Can Hide Both Opportunity And Danger
Private investments are valued differently than publicly traded stocks. Public shares fluctuate every second markets are open. Private companies like Anthropic receive updated valuations only when financing rounds or other market events occur. That means reported net asset values can blend realized losses from one part of a portfolio with unrealized gains elsewhere.
Granted, unrealized appreciation isn’t meaningless. It represents real economic value if those valuations ultimately hold. But investors should recognize that a headline return says little about where gains — and losses — actually originated.
Whether reviewing a hedge fund, mutual fund, or ETF, it’s worth digging beneath the top-line performance figure.
Key Takeaway
In short, the events surrounding Aschenbrenner’s fund offer a reminder that investing success depends on more than identifying the next transformational technology. Risk management matters just as much as stock selection. The hedge fund’s results are an unusual outcome — not a blueprint for success.
Ultimately, smart investors should remember that returns tell only part of the story. Understanding how those returns were generated is often the more valuable lesson.
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