Bali, Turan G.; Zhou, Hao - 2013 - First Draft: March 2011, This Version: January 2013
A conditional asset pricing model with risk and uncertainty implies that the time-varying exposures of equity … portfolios to the market and uncertainty factors carry positive risk premiums. The empirical results from the size, book …-to-market, and industry portfolios as well as individual stocks indicate that the conditional covariances of equity portfolios …