A Generalized Measure of Riskiness
提出一个广义风险度量，它整合了Aumann-Serrano和Foster-Hart的原始度量，并基于风险中性收益分布构建期权隐含风险度量，能预测个股未来风险调整收益，优化投资组合的风险收益权衡。
This paper proposes a generalized measure of riskiness that nests the original measures pioneered by Aumann and Serrano (Aumann, R. J., R. Serrano. 2008. An economic index of riskiness. J. Political Econom. 116(5) 810–836) and Foster and Hart (Foster, D. P., S. Hart. 2009. An operational measure of riskiness. J. Political Econom. 117(5) 785–814). The paper introduces the generalized options' implied measure of riskiness based on the risk-neutral return distribution of financial securities. It also provides asset allocation implications and shows that the forward-looking measures of riskiness successfully predict the cross section of 1-, 3-, 6-, and 12-month-ahead risk-adjusted returns of individual stocks. The empirical results indicate that the generalized measure of riskiness is able to rank equity portfolios based on their expected returns per unit of risk and hence yields a more efficient strategy for maximizing expected return of the portfolio while minimizing its risk. This paper was accepted by Wei Xiong, finance.