Question

What is the key difference in how Expected Shortfall and Value at Risk handle the probability of losses that occur beyond the chosen confidence level?

Accepted Answer

Value at Risk, or VaR, tells you the maximum amount you expect to lose under normal conditions, based on a specific confidence level like 95 percent. It basically draws a line in the sand and says you will not lose more than this amount most of the time. However, VaR ignores everything that happens beyond that line. It does not care if the losses past that point are small or absolutely massive. Think of it like a weather report saying it will not rain more than an inch; it tells you the limit, but it stays silent about whether a tiny drizzle or a massive flood happens if it does rain more than that inch. Expected Shortfall, or ES, fixes this blind spot. It looks at the average of all the losses that happen past that line. If things go really wrong and you end up in that worst-case scenario, Expected Shortfall tells you how deep the hole is on average. Because it averages those extreme losses, it gives you a much better idea of how bad things could get when the market truly crashes.

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What is the key difference in how Expected Shortfall and Value at Risk handle the probability of losses that occur beyond the chosen confidence level?

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