"Realizing that their traditional instruments were inadequate for responding to the crisis that began on 9 August 2007, Federal Reserve officials improvised. Beginning in mid-December 2007, they implemented a series of changes directed at ensuring that liquidity would be distributed to those...

"I describe two amplifications mechanisms that operate during liquidity crises and discuss the scope for central bank policies during crises as well as preventive policies in advance of crises. The first mechanism works through asset prices and balance sheets. A negative shock to the balance...

"Financial systems are inherently fragile because of the very function which makes them valuable: liquidity transformation. Regulatory reforms can strengthen the financial system and decrease the risk of liquidity crises, but they cannot eliminate it completely. This leaves monetary policy with...