An Analysis of Risk and Pricing Anomalies
Tobias J. Moskowitz
AQR Capital; University of Chicago - Booth School of Business; National Bureau of Economic Research (NBER)
CRSP Working Paper No. 500
This paper examines the link between several well-known asset pricing anomalies and covariance risk. Estimating the time-series of the covariance matrix of asset returns via a multivariate GARCH model, I quantify the contribution made by each anomaly to the covariance matrix of asset returns, as well as its ability to forecast future covariances. I find that anomalous returns associated with firm size are closely linked to the covariance matrix, while those associated with book-to-market equity are weakly linked. However, returns associated with momentum do not appear related to covariance risk and do not forecast future covariances. Finally, despite its lack of predictive power on the cross-section of expected returns, the market portfolio is the single most important factor contributing to and forecasting covariance risk.
Number of Pages in PDF File: 40
JEL Classification: G12
Date posted: March 15, 2000