Wall Street Journal: Dollar Tumbles Against the Yen

"Chatter built up however of potential intervention by the Bank of Japan to support the yen. "Although we have no official confirmation, the scale and persistence of the move bears all the hallmarks of a well-timed intervention effort from the Bank of Japan," Corpay Cross-Border Solutions's Karl Schamotta says. He added, however, that it could simply be the result of traders exiting crowded short-yen positions."