HomeNewsBusinessMarketsMichael Burry trades hedge fund for substack: Warns of 'Glorious Folly' in AI boom, targets Nvidia as bubble's cisco

Michael Burry trades hedge fund for substack: Warns of 'Glorious Folly' in AI boom, targets Nvidia as bubble's cisco

November 25, 2025 / 20:15 IST
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Michael Burry
Michael Burry (file image)

Michael Burry, the contrarian investor famed for his prescient bet against the U.S. housing market before the 2008 financial crisis, has shuttered his hedge fund and debuted a paid newsletter on Substack targeting what he calls the “AI bubble.”

Burry closed Scion Asset Management earlier this month, returning capital to investors and deregistering with the Securities and Exchange Commission (SEC) on November 10.

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His new platform, Cassandra Unchained, charges $379 annually or $39 monthly, offering subscribers “a front row seat” to his views on stocks, markets, and bubbles — often framed through historical parallels. The newsletter drew more than 23,000 subscribers on its first day, quickly becoming Substack’s fastest-growing finance publication and surpassing more established players like Citrini Research.

In his inaugural posts, Burry issues a blunt warning on the current AI frenzy. He calls the boom a “glorious folly” fueled by excessive supply and compares Nvidia Corp., the dominant AI chipmaker, to Cisco Systems during the dot-com bubble, noting Nvidia’s stock price surge of over 200% this year has pushed its market valuation past $3 trillion.