Jamie Dimon was one of the few bankers to emerge from the financial crisis with his stellar reputation intact. Dimon took the helm of JPMorgan Chase in 2005 and ably steered the bank through the crisis. In its aftermath, he used his reputation to argue against increased regulations, especially efforts to force banks to increase their capital cushions. But Dimon’s anti-regulatory stance was seriously undermined when a trader in JPMorgan’s chief investment office began building up positions in the credit derivatives market, which eventually lost the bank upwards of $9 billion, according to some estimates. The trading debacle renewed calls for a strict implementation of the Volcker Rule, which prohibits banks from gambling in the market with federally insured deposits, and led to the end of chief investment officer Ina Drew’s career at JPMorgan — concluding one of the most successful careers ever for a woman on Wall Street.