Great Pages: O'Shaughnessy On Models vs. Humans

Can a single page of a book change your investment life? We believe it can. Periodically, we highlight some of the Great Pages that have had a great impact on our investment philosophy. Today, we cheat just a bit, looking at two pages in James O’Shaughnessy’s classic “What Works on Wall Street”. O’Shaughnessy talks about why models are better at predicting outcomes than humans are.

Taken from What Works on Wall Street (4th Ed., McGraw-Hill 2012)

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Validea’s James O’Shaughnessy-inspired portfolio is up 8.5% annualized since its mid-2003 inception vs. 6.5% for the S&P 500. Check out its holdings here.