We show that the stock market downturns of 2000-2002 and 2007-2009 have very different proximate causes. The early 2000's saw a large increase in the discount rates applied to profits by rational investors, while the late 2000's saw a decrease in rational expectations of future profits. We reach...

We empirically decompose the S&P 500's dividend yield into (1) a rational forecast of long-run real dividend growth, (2) the subjectively expected risk premium, and (3) residual mispricing attributed to the market's forecast of dividend growth deviating from the rational forecast. Modigliani and...