The Unintended Impact of Academic Research on Asset Returns: The Capital Asset Pricing Model Alpha

Alex Horenstein

Management Science, 2021, vol. 67, issue 6, 3655-3673

Abstract: This paper explores a channel whereby asset-pricing anomalies can appear as investors alter portfolios according to findings in academic research. In particular, I find that assets with low realized capital asset pricing model (CAPM) alphas outperform those with high alphas, but this finding only appears after the CAPM’s publication in the 1960s. I find evidence consistent with the widespread application of the CAPM generating incentives to tilt portfolios systematically away from low CAPM alpha assets, causing such assets to be undervalued.

Keywords: betting against alpha; capital asset pricing model; extrapolative beliefs (search for similar items in EconPapers)
Date: 2021
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Citations: View citations in EconPapers (2)

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Persistent link: https://EconPapers.repec.org/RePEc:inm:ormnsc:v:67:y:2021:i:6:p:3655-3673

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