Usd/maj. - Federal Reserve Chairman Ben Bernanke said the outlook for the long-suffering U.S. economy appears to be improving n the U.S. central bank was carefully reviewing ways to withdraw its massive monetary policy stimulus when conditions permit. However, Bernanke cautioned that unemployment was likely to remain high into 2011 n he warned that this could sap fragile consumer confidence n potentially undermine what is expected to anyway be a very gradual recovery.