Expected Shortfall as a Tool for Financial Risk Management

Details Expected Shortfall as a Tool for Financial Risk Management Expected Shortfall as a Tool for Financial Risk Management

2001-02-16

arxiv.org/abs/cond-mat/0102304v1

Physics

Condensed Matter

Statistical Mechanics

10 pages

Scientific paper

We study the properties of Expected Shortfall from the point of view of financial risk management. This measure --- which emerges as a natural remedy in some cases where Value at Risk (VaR) is not able to distinguish portfolios which bear different levels of risk --- is indeed shown to have much better properties than VaR. We show in fact that unlike VaR this variable is in general subadditive and therefore it is a Coherent Measure of Risk in the sense of reference (artzner)

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