This paper studies the issue of modeling conditional covariance for a mixed-asset portfolio consisting of stock, bond, and REITs. We examine the performances of six commonly used covariance estimators. We find that no single estimator delivers the best performance when a wide range of...

There has accumulated strong evidence in the literature that market beta (β) is time varying. This paper contributes to the literature by studying how to best model the time varying beta for REITs. We include several commonly used methods and evaluate their performances in terms of in-sample...

Mounting evidence from the literature points to the existence of covariance asymmetry for financial assets. That is, conditional volatility and correlation of financial returns tend to rise more after negative return shocks than after positive ones of the same size. This paper extends the...