Marginal expected shortfall inference under multivariate regular variation
多元正则变动下边际期望损失的统计推断AI 解读 ↓
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AI 根据所提供的论文材料归类:摘要明确研究金融机构极端依赖、市场严重下跌与边际期望损失这一系统性风险指标,因此最直接对应尾部与系统性风险。
多元正则变动下边际期望损失的统计推断AI 解读 ↓
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Marginal expected shortfall is unquestionably one of the most popular systemic risk measures. Studying its extreme behaviour is particularly relevant for risk protection against severe global financial market downturns. In this context, results of statistical inference rely on the bivariate extreme values approach, disregarding the extremal dependence among a large number of financial institutions that make up the market. In order to take it into account we propose an inferential procedure based on the multivariate regular variation theory. We derive an approximating formula for the extreme marginal expected shortfall and obtain from it an estimator and its bias-corrected version. Then, we show their asymptotic normality, which allows in turn the confidence intervals derivation. Simulations show that the new estimators greatly improve upon the performance of existing ones and confidence intervals are very accurate. An application to financial returns shows the utility of the proposed inferential procedure. Statistical results are extended to a general $β$-mixing context that allows to work with popular time series models with heavy-tailed innovations.