NO.PZ2018122701000006
问题如下:
After estimating the 99%, 1-day VaR of a bank’s portfolio to be USD 1,484 using historical simulation with 1000 past trading days, you are concerned that the VaR measure is not providing enough information about tail losses. You decide to re-examine the simulation results and sort the simulated daily P&L from worst to best giving the following worst 15 scenarios:
What is the 99%, 1-day expected shortfall of the portfolio?
选项:
A.
USD 433
B.
USD 1,285
C.
USD 1,945
D.
USD 2,833
解释:
C is correct.
考点Expected Shortfall
解析Expected Shortfall = Average of the worst 10 daily P&L= USD 1945
请问ES不是大于VaR的取平均吗?为什么还要算第10个数(Var)?