Frederick F. Stephan, The Expected Value and Variance of the Reciprocal and Other Negative Powers of a Positive Bernoullian Variate, The Annals of Mathematical Statistics, Vol. 16, No. 1 (Mar., 1945), ...

Learn how to calculate Value at Risk (VaR) to effectively assess financial risks in portfolios, using historical, variance-covariance, and Monte Carlo methods.