Value at Risk (VaR) A technique used to estimate the probability of portfolio losses based on the statistical analysis of historical price trends and volatilities. Investopedia Says: VaR is commonly used by banks, security firms and companies that are involved in trading energy and other commodities. VaR is able to measure risk while it happens and is an important consideration when firms make trading or hedging decisions. Related Terms: Conditional Probability Conditional Value at Risk - CVaR Ex-Post Risk Hedge Mark To Market - MTM Risk Robust Tracking Error Unconditional Probability Volatility |