We build an equilibrium model to explain why stock return predictability concentrates in bad times. The key feature is that investors use different forecasting models, and hence assess uncertainty differently. As economic conditions deteriorate, uncertainty rises and investors' opinions...

We provide empirical evidence that CAPM-betas positively predict asset returns when market returns are predicted to be high, which occurs about every other month. Consequently, the product of beta and the predicted market return (CAPM) predicts asset returns by combining the out-of-sample...

If investors can hedge risk at no cost, then the CAPM should hold period by period (Merton, 1973). That is, the time-t expected return of an asset should be equal to the product of its time-t beta and the time-t market expected return. We empirically test this CAPM relation on equity portfolios....

We investigate the dynamic problem of how much attention an investor should pay to news in order to learn about stock-return predictability and maximize expected lifetime utility. We show that the optimal amount of attention is U-shaped in the return predictor, increasing with both uncertainty...

Equilibrium asset-pricing models with time-varying expected economic growth have been criticized for their apparent inability to generate an upward-sloping yield curve and downward-sloping term structures of equity risk and risk premium. We theoretically investigate the model-implied equilibrium...