Abstract

http://ssrn.com/abstract=1967462
 
 

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Speculative Betas


Harrison G. Hong


Princeton University - Department of Economics; National Bureau of Economic Research (NBER)

David Alexandre Sraer


University of California, Berkeley; Princeton University

August 7, 2014


Abstract:     
We provide a model for why high beta assets are more prone to speculative overpricing than low beta ones. When investors disagree about the common factor of cash-flows, high beta assets are more sensitive to this macro-disagreement and experience a greater divergence-of-opinion about their payoffs. Short-sales constraints for some investors such as retail mutual funds result in high beta assets being over-priced. When aggregate disagreement is low, expected return increases with beta due to risk-sharing. But when it is large, expected return initially increases but then decreases with beta. High beta assets have greater shorting from unconstrained arbitrageurs and more share turnover. Using measures of disagreement about stock earnings and economic uncertainty, we verify these predictions. A calibration exercise yields reasonable parameter values.

Number of Pages in PDF File: 70

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Date posted: December 3, 2011 ; Last revised: August 23, 2014

Suggested Citation

Hong, Harrison G. and Sraer , David Alexandre, Speculative Betas (August 7, 2014). Available at SSRN: http://ssrn.com/abstract=1967462 or http://dx.doi.org/10.2139/ssrn.1967462

Contact Information

Harrison G. Hong (Contact Author)
Princeton University - Department of Economics ( email )
Princeton, NJ 08544-1021
United States
National Bureau of Economic Research (NBER)
1050 Massachusetts Avenue
Cambridge, MA 02138
United States
David Alexandre Sraer
University of California, Berkeley ( email )
310 Barrows Hall
Berkeley, CA 94720
United States
Princeton University ( email )
22 Chambers Street
Princeton, NJ 08544
United States
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