Richard204 Nelson

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What is Expected Shortfall (ES) and how is it different from VaR?

Expected Shortfall, also called Conditional VaR, measures the average loss beyond the VaR threshold. For example, if 95% VaR = $1,000, ES calculates the mean of the worst 5% outcomes, say $2,500. ES gives a fuller picture of tail risk, while VaR may underestimate black swan impacts. Regulators prefer ES because it captures not just “how often” but also “how bad” extreme losses can be. Institutions use ES for capital allocation, risk reporting, and portfolio optimization. Retail traders can approximate ES by averaging their largest losing streaks to gauge realistic pain levels. The key insight: VaR is a line in the sand, but ES shows how deep the pit gets after you cross it.