Currency traders work at a foreign exchange company in Tokyo,Tuesday, Feb. 26, 2013. In currency markets, the dollar was down 0.7 percent to 91.92 yen. But the yen, which has fallen by

 

              Currency traders work at a foreign exchange company in Tokyo,Tuesday, Feb. 26, 2013. In currency markets, the dollar was down 0.7 percent to 91.92 yen. But the yen, which has fallen by
Currency traders work at a foreign exchange company in Tokyo,Tuesday, Feb. 26, 2013. In currency markets, the dollar was down 0.7 percent to 91.92 yen. But the yen, which has fallen by about 20 percent in recent weeks, is still much weaker than it was for most of last year. (AP Photo/Koji Sasahara)