The CAPS Prediction System and Stock Market Returns

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The CAPS Prediction System and Stock Market Returns

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Title: The CAPS Prediction System and Stock Market Returns
Author: Avery, Christopher N.; Zeckhauser, Richard Jay

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Citation: Avery, Christopher, and Richard Zeckhauser. 2009. The "CAPS" prediction system and stock market returns. HKS Faculty Research Working Papers Series RWP09-011, John F. Kennedy School of Government, Harvard University.
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Abstract: We analyze the informational content of more than 1.2 million stock picks provided by more than 60,000 individuals from November 1, 2006 to October 31, 2007 on the CAPS open access website created by the Motley Fool company (www.caps.fool.com). On average, an individual pick in CAPS outperformed the S&P 500 index by 4 percentage points in the twelve months after the pick. We use a four-factor regression framework to estimate the excess returns associated with portfolios that aggregate these picks; a portfolio of the most popular CAPS stocks yielded excess returns of more than 18 percentage points annually relative to the portfolio of the least popular stocks.
Published Version: http://web.hks.harvard.edu/publications/workingpapers/citation.aspx?PubId=6577
Terms of Use: This article is made available under the terms and conditions applicable to Other Posted Material, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#LAA
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:4415901
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