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Why Investors Should Beware 13F Filings
Quarterly reports promise a glimpse into Wall Street’s biggest portfolios. In reality, that snapshot is blurrier than you think.
The end of every quarter starts a countdown: hedge funds and institutional money managers have 45 days to file their 13Fs — a public snapshot of their stock portfolios. For investors, it’s one of the few sanctioned peeks into where the so-called smartest money has been at work.
A single disclosure from Warren Buffett’s Berkshire Hathaway Inc. or David Tepper’s Appaloosa Management can jolt markets, sending shares in sectors from health insurance to software swinging. Other high-profile money managers draw similar scrutiny as investors scour filings for hints of shifting convictions or huge trades.