Two Skewed Risks
58 Pages Posted: 31 Mar 2020 Last revised: 23 Jun 2021
Date Written: May 18, 2020
We analyze the joint effects of skewness and correlation in a simple two-asset framework. Returns follow the split bivariate normal distribution, which combines bivariate normal distributions with different standard deviations and provides a good empirical fit. We show that equilibrium risk premia deviate from the CAPM if assets differ in skewness. Moreover, if the more positively skewed asset is more volatile, it underperforms and its beta, maximum return, idiosyncratic and systematic skewnesses are all higher—consistent with empirical evidence. We also derive formulas and analyze the role of skewness for portfolio choice and recently proposed conditional risk metrics.
Keywords: Skewness, Co-Skewness, Conditional Expected Shortfall, Conditional Value-at-Risk, Portfolio Choice, Asset Pricing
JEL Classification: G11, G12, G32
Suggested Citation: Suggested Citation