When Oracles Err Warren Buffett, Mark Twain, and John Maynard Keynes all made enormous investment mistakes at some point in their lives. On today's show, those stories — and the lessons we can all take from them.
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When Oracles Err

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When Oracles Err

When Oracles Err

When Oracles Err

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Warren Buffett, Mark Twain, and John Maynard Keynes all made enormous investment mistakes at some point in their lives. On today's show, those stories — and the lessons we can all take from them.

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Warren Buffett speaks onstage during Fortune's Most Powerful Women Summit, in October 2015.
Paul Morigi/Stringer/Getty Images