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Expected shortfall (ES) is a risk measure that does take account of expected losses beyond the VaR level. It was first proposed by Artzner et al. (1999) as an example of the coherent risk measure. Formally, the ES is defined as the expected loss conditional on the fact that the loss is greater than the VaR level. Lauren Li, FRM, is currently examining the properties of the ES. Under which of the following conditions will the ES drop in magnitude?
A
The time horizon is reset to become longer.
B
The sample size is adjusted to become larger.
C
The confidence level is reset to become lower.
D
The ES is a constant measure of risk for a given portfolio.