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arXiv 1704.02609math.PR
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二阶规则变化下的风险集中

Risk concentration under second order regular variation

Bikramjit Das, Marie Kratz

摘要:

重尾风险投资组合的风险集中度及其渐近行为的度量是风险管理中的一个重要问题。二阶正则变分是研究风险因子收敛速度时经常对风险因子施加的结构性假设。本文给出了当重尾风险因子组合具有二阶正则变差性质时,风险集中度量的渐近收敛速率.此外,我们还探讨了向量的多元二阶正则变分之间的关系(例如,风险因素)及其分量之和的二阶规则变化特性(例如,风险因素的组合)。结果与各种例子说明。

英文摘要:

Measures of risk concentration and their asymptotic behavior for portfolios with heavy-tailed risk factors is of interest in risk management. Second order regular variation is a structural assumption often imposed on such risk factors to study their convergence rates. In this paper, we provide the asymptotic rate of convergence of the measure of risk concentration for a portfolio of heavy-tailed risk factors, when the portfolio admits the so-called second order regular variation property. Moreover, we explore the relationship between multivariate second order regular variation for a vector (e.g., risk factors) and the second order regular variation property for the sum of its components (e.g., the portfolio of risk factors). Results are illustrated with a variety of examples.

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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