Sharpe thinking in asset ranking with one-sided measures
If we exclude the assumption of normality in return distributions, the classical riskreward Sharpe Ratio becomes a questionable tool for ranking risky projects. In line with Sharpe thinking, a general riskreward ratio suitable to compare skewed returns with respect to a benchmark is introduced. The index includes asymmetrical information on: (1) good volatility (above the benchmark) and bad volatility (below the benchmark), and (2) asymmetrical preference to bet on potential high stakes and the aversion against possible huge losses. The former goal is achieved by using one-sided volatility measures and the latter by choosing the appropriate order for the one-sided moments involved. The Omega Index (see [Cascon A., Keating, C., Shadwick, W., 2002. Introduction to Omega, The Finance Development Centre]) and the Upside Potential Ratio (see [Sortino, F., Van Der Meer, R., Plantinga, A., 1999. The Dutch triangle. Journal of Portfolio Management, 26 (I, Fall), 5058]) follow as special cases.
risk management sharpe index one-sided risk measures