YAN Xuechen, LI Lu, WANG Yashi, . Worst-Case Distortion Risk Measure with Application to Robust Portfolio Selection[J]. Chinese Journal of Applied Probability and Statistics, 2024, 40(1): 122-138.
Citation: YAN Xuechen, LI Lu, WANG Yashi, . Worst-Case Distortion Risk Measure with Application to Robust Portfolio Selection[J]. Chinese Journal of Applied Probability and Statistics, 2024, 40(1): 122-138.

Worst-Case Distortion Risk Measure with Application to Robust Portfolio Selection

Funds: The project was supported by Qian Duansheng Distinguished Scholar Support Program of China University of Political Science and Law (Grant No. DSJCXZ180403)
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  • Corresponding author:

    WANG Yashi, E-mail: wangysh0727@163.com

  • Portfolio selection depends heavily on the underlying distribution of loss. When the distribution information of loss can only be observed through a limited sample of data, robustness of the portfolio selection model is of crucial importance. Assuming that the underlying distribution of loss has a known mean and variance and lies within a ball centred on the reference distribution with the Wasserstein distance as the radius, this paper proposes a robust portfolio strategy model based on the distortion risk measure and translates it into a simpler equivalent form. Furthermore, simulation and empirical study are used to demonstrate the validity of the model.

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