英文标题:
《Financial Portfolios based on Tsallis Relative Entropy as the Risk
Measure》
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作者:
Sandhya Devi
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最新提交年份:
2019
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英文摘要:
Earlier studies have shown that stock market distributions can be well described by distributions derived from Tsallis entropy, which is a generalization of Shannon entropy to non-extensive systems. In this paper, Tsallis relative entropy (TRE), which is the generalization of Kullback-Leibler relative entropy (KLRE) to non-extensive systems, is investigated as a possible risk measure in constructing risk optimal portfolios whose returns beat market returns. Portfolios are constructed by binning the risk values and allocating the stocks to bins according to their risk values. The average return in excess of market returns for each bin is calculated to get the risk-return patterns of the portfolios. The results are compared with those from three other risk measures: 1) the commonly used \'beta\' of the Capital Asset Pricing Model (CAPM), 2) Kullback-Leibler relative entropy, and 3) the relative standard deviation. Tests carried out for both long (~18 years) and shorter terms (~9 years), which include the dot-com bubble and the 2008 crash periods, show that a linear fit can be obtained for the risk-excess return profiles of all four risk measures. However, in all cases, the profiles from Tsallis relative entropy show a more consistent behavior in terms of both goodness of fit and the variation of returns with risk, than the other three risk measures.
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中文摘要:
早期的研究表明,股票市场分布可以很好地用Tsallis熵的分布来描述,Tsallis熵是Shannon熵对非广义系统的推广。本文研究了将Kullback-Leibler相对熵(KLRE)推广到非广义系统的Tsallis相对熵(TRE),作为构建收益优于市场收益的风险最优投资组合的一种可能的风险度量。投资组合是通过对风险值进行分类并根据风险值将股票分配到分类箱来构建的。计算每个bin超过市场回报的平均回报,以获得投资组合的风险回报模式。结果与其他三种风险度量的结果进行了比较:1)资本资产定价模型(CAPM)常用的“β”,2)Kullback-Leibler相对熵,以及3)相对标准差。对长期(约18年)和短期(约9年)进行的测试(包括网络泡沫和2008年崩溃期)表明,所有四种风险度量的风险超额收益曲线都可以得到线性拟合。然而,在所有情况下,与其他三种风险度量相比,Tsallis相对熵的曲线在拟合优度和收益随风险的变化方面表现出更一致的行为。
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分类信息:
一级分类:Quantitative Finance 数量金融学
二级分类:Statistical Finance 统计金融
分类描述:Statistical, econometric and econophysics analyses with applications to financial markets and economic data
统计、计量经济学和经济物理学分析及其在金融市场和经济数据中的应用
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