Abstract

http://ssrn.com/abstract=1881503
 
 

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Is the Relation between Volatility and Expected Stock Returns Positive, Flat or Negative?


Pim Van Vliet


Robeco Asset Management - Quantitative Strategies

David Blitz


Robeco Asset Management - Quantitative Strategies

Bart Van der Grient


Robeco Asset Management - Quantitative Strategies

July 2011


Abstract:     
Theoretical models, such as the CAPM, predict a positive relation between risk and return, but the empirical evidence paints a mixed picture. Positive, flat and negative relations have been reported in various empirical studies. In this paper we reconcile these seemingly conflicting results by showing how methodological choices can lead to different, or even opposite conclusions. In our 1963-2009 U.S. sample we find that the empirical relation between historical volatility and expected returns is negative, with an average quintile return spread of -3.7%.The relation becomes 2% less negative when small caps are excluded, but 3% more negative when compounding effects are taken into account. We also argue that the positive relation between volatility and expected return reported by some studies can be attributed to various kinds of look-ahead bias. Our results provide an empirical basis for low-volatility and minimum-variance investment approaches.

Number of Pages in PDF File: 25

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Date posted: July 8, 2011  

Suggested Citation

van Vliet, Pim and Blitz, David and van der Grient, Bart, Is the Relation between Volatility and Expected Stock Returns Positive, Flat or Negative? (July 2011). Available at SSRN: http://ssrn.com/abstract=1881503 or http://dx.doi.org/10.2139/ssrn.1881503

Contact Information

Pim Van Vliet (Contact Author)
Robeco Asset Management - Quantitative Strategies ( email )
Rotterdam, 3011 AG
Netherlands
David Blitz
Robeco Asset Management - Quantitative Strategies ( email )
Coolsingel 120
Rotterdam, 3011 AG
Netherlands
Bart Van der Grient
Robeco Asset Management - Quantitative Strategies ( email )
P.O. Box 973
3000 AZ Rotterdam
Netherlands
HOME PAGE: http://www.robeco.com
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