In the first chapter ``Gold, Platinum, and Expected Stock Returns\u27\u27, I show that the ratio of gold to platinum prices (GP) reveals variation in risk and proxies for an important economic state variable. GP predicts future stock returns in the time-series and explains variation in average stock returns in the cross-section. GP outperforms existing predictors and similar patterns are found in international markets. GP is persistent and significantly correlated with option-implied tail risk measures. An equilibrium model featuring recursive preferences, time-varying tail risk, and shocks to preferences for gold and platinum can account for the asset pricing dynamics of equity, gold, and platinum markets, and quantitatively explain the re...