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Portfolio Optimization with Groupwise Selection

机译:具有GroupWise选择的产品组合优化

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Portfolio optimization in the presence of estimation error can be stabilized by incorporating norm-constraints; this result was shown by DeMiguel et al. (A generalized approach to portfolio optimization: improving performance by constraining portfolio norms, Management Science, 5, 798-812, 2009), who reported empirical performance better than numerous competing approaches. We extend the idea of norm-constraints by introducing a powerful enhance- ment, grouped selection for portfolio optimization. Here, instead of merely penalizing norms of the assets being se- lected, we penalize groups, where within a group assets are treated alike, but across groups, the penalization may dif- fer. The idea of groupwise selection is grounded in statistics, but to our knowledge, it is novel in the context of portfo- lio optimization. Novelty aside, the real benefits of groupwise selection are substantiated by experiments; our results show that groupwise asset selection leads to strategies with lower variance, higher Sharpe ratios, and even higher ex- pected returns than the ordinary norm-constrained formulations.
机译:通过结合规范约束,可以稳定在估计误差存在下的投资组合优化;该结果由Demiguel等人显示。 (投资组合优化的广义方法:通过约束产品规范,管理科学,5,798-812,2009)提高绩效,他报告了比众多竞争方法更好的经验表现。我们通过引入强大的增强,分组选择进行组合优化来扩展规范限制的思想。在此,我们不仅仅是惩罚所在资产的规范,我们惩罚小组资产的群体,但在跨组织的惩罚中,惩罚可能会差异。 GroupWise选择的想法是在统计数据的基础上,但对于我们的知识,它是新颖的在Portfo-Lio优化的背景下。抛开新颖性,通过实验证实了GroupWise选择的真正益处;我们的研究结果表明,GroupWise资产选择导致具有较低方差,更高的尖锐比率,甚至比普通规范的制剂更高的返回更高的返回。

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