HRI 发表于 2009-10-17 17:39
VaR is the measurement of the market risk, while CVaR is the meansurement of credit VaR. Both looks like the same. But they are different.
Hey, not an expert, but as far as I know, for the same portfolio and the same probability level, the CVaR (expected shortfall) is always worse than or equal to the VaR. If you think about it, lets assume VaR is 8%, 8% is just a threshold, it only tells you under specified circumstances, AT LEAST 8% will be lost, the maximum loss could be either 9% or 40%. But the CVaR is an expectation, when considering all the cases in the left tail, the expectation should be worse than the threshold. Not sure if it makes sense to you...