Passersby watch share prices spike in Tokyo on April 4, the day Japan's central bank announced a massive purchase of government bonds. The bank hopes the scale of the effort will boost Japan's slow-moving economy. Yoshikazu Tsuno/AFP/Getty Images hide caption

itoggle caption Yoshikazu Tsuno/AFP/Getty Images

Banks in Cyprus reopened to customers for the first time in nearly two weeks Thursday, albeit with strict restrictions. Petros Giannakouris/AP hide caption

itoggle caption Petros Giannakouris/AP

Sen. Elizabeth Warren, D-Mass., questions Federal Reserve Board Chairman Ben Bernanke during a Senate hearing last month. Senators from both ends of the political spectrum argue that financial reforms are insufficient to protect taxpayers from potential risks posed by large banks. Gary Cameron/Reuters/Landov hide caption

itoggle caption Gary Cameron/Reuters/Landov

Federal Reserve Chairman Ben Bernanke testifies before the Senate Banking Committee in Washington last month. Some analysts wonder if he and other policymakers have kept interest rates too low for too long. Carolyn Kaster/AP hide caption

itoggle caption Carolyn Kaster/AP