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Empirical Study for Exchange Rate Risk of CNY: Using VaR and ES Based on Extreme Value Theory

机译:基于极值理论的基于极值理论,使用VAR和ES的汇率风险实证研究

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This paper applies extreme value theory (EVT) to estimate return series' tails of CNY exchange rates, and finds that the degree of fitting Pareto distribution to the data of return series' tail is extremely high; what's different from expected result is that expected shortfall (ES) can't improve the tail risk problem of Value-at-Risk (VaR) evidently. Result of back testing indicates that EVT-based VaR values underestimate the risk of USD/CNY and HKD/CNY, this may be caused by the continuous CNY appreciation toward USD and HKD. However, comparing with VaR values calculated by historical simulation (HS) and variance-covariance method, VaR values calculated by EVT can measure the risk more accurately while dealing with JPY/CNY and EUR/CNY under high confidence level.
机译:本文适用极值理论(EVT)来估算回报系列的CNY汇率尾,并发现贴晶圆系数据的装配程度非常高;与预期结果不同的是,预期的缺点是不明显地改善价值(var)的尾部风险问题。后卫测试的结果表明,基于EVT的VAR值低估了USD / CNY和HKD / CNY的风险,这可能是由对USD和HKD的持续性收康赞赏造成的。然而,与历史模拟(HS)和方差协方差方法计算的VAR值相比,EVT计算的VAR值可以更准确地测量风险,同时在高置信水平下处理JPY / CNY和EUR / CNY。

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