2 Why did a relatively small amount of losses on subprime mortgage loans lead to such broad-based financial disruption? After all, a 3 percent decline in stock market prices sometimes happens on a daily basis with hardly a ripple in the U.S. economy.
In part, the outsized impact of mortgage losses on broader financial markets probably stems from the fact that they exposed a more extensive set of problems in financial intermediation that were not limited to the original subprime loans. The liquidity shock that hit us in August has been described by one of my colleagues as a global margin call on virtually all leveraged positions.