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arXiv 2602.06401q-fin.RMq-fin.MF
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Wishart条件尾风险度量:一种分析方法

Wishart conditional tail risk measures: An analytic approach

Auckland University of Technology(奥克兰理工大学);PRISM Sorbonne EA 4101, Université Paris 1 Panthéon - Sorbonne(巴黎第一大学潘特翁-索邦大学);Monash University(蒙纳士大学)

Jose Da Fonseca, Patrick Wong

AI总结:

本文提出了一种基于Wishart过程的分析方法,用于计算多变量风险度量,并展示了其在资本分配和风险管理中的应用。

摘要:

本文介绍了一种新的分析框架,用于量化多变量风险度量。利用Wishart过程,即一个取值在正定矩阵空间中的随机过程,我们推导出几种条件尾风险度量,得益于Wishart过程的显著分析特性,这些度量可以明确计算到一维或二维积分。这些量也可以用于基于条件矩的资本分配问题。利用Wishart过程的随机微分方程性质,我们展示了如何将这些风险度量的跨期(即时间滞后)观点嵌入到所提出的框架中。几个数值示例表明,该框架具有灵活性和可操作性,从而为风险管理提供了一个有用的工具。

英文摘要:

This study introduces a new analytical framework for quantifying multivariate risk measures. Using the Wishart process, which is a stochastic process with values in the space of positive definite matrices, we derive several conditional tail risk measures which, thanks to the remarkable analytical properties of the Wishart process, can be explicitly computed up to a one- or two-dimensional integration. These quantities can also be used to solve analytically a capital allocation problem based on conditional moments. Exploiting the stochastic differential equation property of the Wishart process, we show how an intertemporal (i.e., time-lagged) view of these risk measures can be embedded in the proposed framework. Several numerical examples show that the framework is versatile and operational, thus providing a useful tool for risk management.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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