>"The most significant economic event of the era since World War II is something that has not happened.” In the 1945 film It’s A Wonderful Life, banker protagonist George Bailey (played by Jimmy Stewart) struggles to exchange his well-functioning loans for cash. He lacks convertibility—known as liquidity risk in modern finance—and so cannot pay impatient depositors. Like any traditional financial intermediary, Bailey seeks to transform short-term debts (deposits) into long-term assets (loans).

The crisis also revealed the vulnerabilities of contemporary risk management. Modern risk management practices depend largely on hedging derivatives. Hedging is somewhat analogous to taking out an insurance policy; at its heart are derivatives dealers who act as counterparties and set prices. Derivatives, including options, swaps, futures, and forward contracts, reduce the risk of adverse price movements in underlying assets. The crisis exposed their fragile nature—dealers’ willingness to bear risk decreased following losses on their portfolios.