Statistical Inference for the Expected Utility Portfolio in High Dimensions
Taras Bodnar (Stockholm University)
Solomiia Dmytriv (University of Vienna)
Yarema Okhrin (Universität Augsburg)
Nestor Parolya (TU Delft - Statistics)
Wolfgang Schmid (European University Viadrina)
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Abstract
In this paper, using the shrinkage-based approach for portfolio weights and modern results from random matrix theory we construct an effective procedure for testing the efficiency of the expected utility (EU) portfolio and discuss the asymptotic behavior of the proposed test statistic under the high-dimensional asymptotic regime, namely when the number of assets p increases at the same rate as the sample size n such that their ratio p/n approaches a positive constant cin (0,1) as nto infty. We provide an extensive simulation study where the power function and receiver operating characteristic curves of the test are analyzed. In the empirical study, the methodology is applied to the returns of S&P 500 constituents.