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A correction for classic performance measures

Hayette Gatfaoui

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Abstract: Non normality in asset returns is now a common feature of financial markets. However, many practitioners as well as investors do still refer to classic risk adjusted performance measures to assess their investment. For example, Sharpe and Treynor ratios are designed for a Gaussian world. Then, employing them for a performance assessment prospect relative to the risk borne is a biased approach. If we look for consistency in risk assessment and in asset performance valuation, we need to look for robust methods or tools. Moreover, the well known mathematical consistency and numerical tractability concerns drive our preference for simple methods. Under this setting, we propose to account in a simple way and to some extent for the skewness and kurtosis patterns describing the deviations from normality. We propose therefore adjusted versions of Sharpe and Treynor ratios, which account for the downside and upside deviation risk from the mean values of asset returns.

Date: 2012-01
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Citations: View citations in EconPapers (2)

Published in Chinese Business Review, 2012, Vol. 11 (Issue 1), pp 1-28

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