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Convex risk measures based on generalized lower deviation and their applications

Tianwen Fu, Xinkai Zhuang, Yongchang Hui and Jia Liu

International Review of Financial Analysis, 2017, vol. 52, issue C, 27-37

Abstract: Considering the implementability and the properties that a reasonable and realistic risk measure should satisfy, we propose a new class of risk measures based on generalized lower deviation with respect to a chosen benchmark. Besides convexity and monotonicity, our new risk measure can reflect the investor's degree of risk aversion as well as the fat-tail phenomenon of the loss distribution with the help of different benchmarks and weighted functions. Based on the new risk measure, we establish a realistic portfolio selection model taking market frictions into account. To examine the influence of the benchmarks and weighted functions on the optimal portfolio and its performance, we carry out a series of empirical studies in Chinese stock markets. Our in-sample and out-of-sample results show that the new risk measure and the corresponding portfolio selection model can reflect the investor's risk averse attitude and the impact of different trading constraints. Most importantly, with the new risk measure we can obtain an optimal portfolio which is more robust and superior to the optimal portfolios obtained with the traditional expected shortfall risk measures.

Keywords: Deviation risk measure; Generalized convex risk measure; Market frictions; Portfolio optimization; Performance ratio (search for similar items in EconPapers)
Date: 2017
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