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RFS Advance Access published online on March 26, 2004
Review of Financial Studies, doi:10.1093/rfs/hhh008
Review of Financial Studies © The Society for Financial Studies 2004; all rights reserved
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The Review of Financial Studies © The Society for Financial Studies 2004; all rights reserved.

Original Articles

Whence GARCH? A Preference-Based Explanation for Conditional Volatility

Grant McQueen 1 and Keith Vorkink 1*
1 Business Management Department, Marriott School of Management, Brigham Young University, Provo, UT, 84602

* To whom correspondence should be addressed. E-mail: keith_vorkink{at}byu.edu.


  Abstract

We develop a preference-based equilibrium asset pricing model that explains low frequency conditional volatility. Similar to Barberis, Huang, and Santos (2001), agents in our model care about wealth changes, experience loss aversion, and keep a mental scorecard that affects their level of risk aversion. A new feature of our model is that when perturbed by unexpected returns, investors become temporarily more sensitive to news. Gradually, investors become accustomed to the new level of wealth, restoring prior levels of risk aversion and news sensitivity. The state-dependent sensitivity to news creates the type of volatility clustering found in low frequency stock returns. We find empirical support for our model's predictions that relate the scorecard to conditional volatility and skewness.


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