Every time a star investor implodes, Warren Buffett looks a little smarter.

Leopold Aschenbrenner, 24, a Columbia valedictorian and former OpenAI researcher, was the toast of Wall Street after building a $45 billion hedge fund in under two years, and notching a 1,000% gain since inception this spring.

But disaster struck his firm, Situational Awareness, in late July. A sharp downswing in AI stocks triggered margin calls from the firm’s lenders, forcing a fire sale of most of its publicly traded stock portfolio to Ken Griffin’s Citadel.

Buffett, 95, who retired as Berkshire Hathaway’s CEO at the turn of the year, successfully avoided catastrophe…