Summary

Billionaire investor Bill Ackman of Pershing Square has laid out one of the more provocative big-cap calls of this AI cycle. On the All-In Podcast, he argued that today's mega-cap incumbents are being treated the way the market treated Warren Buffett's empire, Berkshire Hathaway, at the peak of the dot-com bubble: as yesterday's story while capital chases the newest thing. His subsequent 13F filings show he has continued adding to Microsoft and Meta even as the thesis has begun to play out.

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