As liquidity conditions in the "repo market"--the market where broker-dealers obtain financing for their securities--deteriorated following the near-bankruptcy of Bear Stearns in March 2008, the Federal Reserve took the step of creating a special facility to provide overnight loans to dealers...

Cash is an extremely useful social contrivance. Two possible drawbacks of high-denomination cash have recently been discussed by Kenneth Rogoff in his book The Curse of Cash, and echoed by other economists. They are the extensive use of high-denomination cash by criminals and others engaged in...