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Partial information about contagion risk, self-exciting processes and portfolio optimization

机译:有关传染风险,自我激励过程和投资组合优化的部分信息

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This paper compares two classes of models that allow for additional channels of correlation between asset returns: regime switching models with jumps and models with contagious jumps. Both classes of models involve a hidden Markov chain that captures good and bad economic states. The distinctive feature of a model with contagious jumps is that large negative returns and unobservable transitions of the economy into a bad state can occur simultaneously. We show that in this framework the filtered loss intensities have dynamics similar to self-exciting processes. Besides, we study the impact of unobservable contagious jumps on optimal portfolio strategies and filtering.
机译:本文比较了允许在资产收益率之间建立其他关联渠道的两类模型:具有跳跃的政权转换模型和具有传染性跳跃的模型。这两类模型都包含一个隐藏的马尔可夫链,该链捕获了好的和坏的经济状况。具有传染性的跳跃的模型的显着特征是,大的负收益和无法观察到的经济向不良状态的转变可以同时发生。我们表明,在此框架中,滤波后的损失强度具有与自激过程相似的动力学。此外,我们研究了不可察觉的传染性跳跃对最优投资组合策略和过滤的影响。

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