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Who owns what

Short interest, big funds' quarterly holdings (the 13F) and options flow. Who holds a stock and who is betting against it.

All How options are priced Option expiration and assignment Earnings Mergers, acquisitions and spin-offs Reading SEC filings How markets work The economy and the Fed Other markets that move stocks Risk and position sizing Who owns what

No. 009 Mon 2 Nov 2026

Who owns what · History

Michael Burry says his $912 million bet against Palantir cost $9.2 million