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A shrinkage approach for Sharpe ratio optimal portfolios with estimation risks

Kircher, Felix ; Rösch, Daniel


We consider the problem of maximizing the out-of-sample Sharpe ratio when portfolio weights have to be estimated. We apply an improved bootstrap-based estimator, and an approximative estimator derived from a Taylor series. In a simulation study and empirical analysis with 15 datasets the proposed estimators outperform the minimum variance and equally weighted portfolio strategies. Out-of-sample ...


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