Dollar tumbles as market responds to dovish Fed

By Dion Rabouin NEW YORK (Reuters) - The dollar tumbled against major currencies on Thursday, extending declines triggered by Wednesday's Federal Reserve statement showing the U.S. central bank would likely take longer to raise rates than some had thought. The dollar was down more than 1 percent against the euro, yen and Swiss franc, as markets took a more dovish view of Fed Chair Janet Yellen's post-meeting press conference. Yellen said during the conference that "caution is appropriate" when i