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Beschreibung:
An intersection-union test for supporting the hypothesis that a given investment strategy is optimal among a set of alternatives is presented. It compares the Sharpe ratio of the benchmark with that of each other strategy. The intersection-union test takes serial dependence into account and does not presume that asset returns are multivariate normally distributed. An empirical study based on the G-7 countries demonstrates that it is hard to find significant results due to the lack of data, which confirms a general observation in empirical finance.