Estimation of the Marginal Expected Shortfall: the Mean When a Related Variable is Extreme
边际期望损失的估计:当相关变量处于极端值时AI 解读 ↓
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AI 根据所提供的论文材料归类:摘要以金融机构系统性风险中的边际期望损失为对象,属尾部与系统性风险;同时核心是条件分位数与极端分位点下的分布估计,涉及分位数与分布效应。
边际期望损失的估计:当相关变量处于极端值时AI 解读 ↓
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Summary Denote the loss return on the equity of a financial institution as X and that of the entire market as Y. For a given very small value of p > 0, the marginal expected shortfall (MES) is defined as E{X|Y>QY(1−p)}, where Q Y(1 − p) is the (1 − p)th quantile of the distribution of Y. The MES is an important factor when measuring the systemic risk of financial institutions. For a wide non-parametric class of bivariate distributions, we construct an estimator of the MES and establish the asymptotic normality of the estimator when p ↓ 0, as the sample size n → ∞. Since we are in particular interested in the case p = O(1/n), we use extreme value techniques for deriving the estimator and its asymptotic behaviour. The finite sample performance of the estimator and the relevance of the limit theorem are shown in a detailed simulation study. We also apply our method to estimate the MES of three large US investment banks.