Who is Expected Shortfall?

Expected Shortfall is like knowing how much candy you might lose if your bag gets stolen on a busy day.

Imagine you and your friends have a big bag of candies that you all share. Sometimes, the bag gets stolen, but it doesn’t always happen. You know this happens sometimes, but you want to be ready for when it does. Expected Shortfall is like figuring out how many candies you should save in case the bag gets stolen.

Think of your candy stash as money in a piggy bank. If your piggy bank gets broken into, that’s like a loss. Now imagine you know how often that happens, maybe once every few weeks. Expected Shortfall tells you on average, how many candies (or dollars) you should expect to lose each time it happens.

It's not just about the chance of losing your candy, it's also about how much you might actually lose when it does happen.

So, Expected Shortfall is like planning for the worst, but not too bad, so you can still enjoy your candies most of the time.