In the years leading up to the current financial crisis, risks built up dangerously in our financial system. Rising asset prices, particularly in housing, concealed a sharp deterioration of underwriting standards for loans. The nation’s largest financial firms, already highly leveraged, became increasingly dependent on unstable sources of short- term funding. In many cases, weaknesses in firms’ risk-management systems left them unaware of the aggregate risk exposures on and off their balance sheets. A credit boom accompanied a housing bubble. Taking access to short-term credit for granted, firms did not plan for the potential demands on their.