In Early 2012, a portfolio inside JPMorgan Chase’s Chief Investment Office was breaching its risk limits. Then a new value-at-risk model arrived, and the problem seemed to vanish. The new model cut the portfolio’s reported risk roughly in half. Months later, the trades that became known as the “London Whale” https://donovanlhbvo.life-wiki.com/2696199/when_the_risk_model_is_the_risk_what_institutions_know_about_algorithmic_trading_risk_management