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Cindy2022-08-02 14:06:08
同学你好,A,VaR is the loss that will not be exceeded over a certain period with a certain probability. The probability is referred to as the significance level.
比如95%的VAR=100,意思是有95%的概率,损失不会超过100,这里的95%,指的是confidence level,而不是significance level
B.The expected shortfall is the expected loss conditional on the loss being equal or greater than the VaR level.
ES是超过VAR的损失数据取期望,不包含VAR本身,这里说的是 equal or greater than,应该改成greater than
C.VaR satisfies the subadditivity (diversification) axiom.
VAR在极端情况下并不满足次可加性,所以C错了
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