The dollar slipped against the euro on Wednesday after Mario Draghi said the ECB needed more time to assess whether to boost QE.
The dollar hit an almost two-week high after comments from Fed officials revived expectations of a U.S. interest rate hike this year.
The Brazilian real hit a new all-time low on Tuesday after authorities announced a massive austerity package at a time when the economy is shrinking fast.
The U.S. dollar strengthened against a basket of major currencies on the view that the Fed was on track to hike rates this year.
Sim Moh Siong, FX strategist at Bank of Singapore, says the weakening in the U.S. dollar will be "shallow and brief" given that the Fed remains on course for a rate hike by year-end.
The dollar rebounded from a three-week low on Friday, a day after the Federal Reserve kept U.S. interest rates on hold.
The Fed's inactivity has left no doubt in analysts' minds that other central banks will now look to ease policy further.
The dollar hit session lows against the euro and fell versus the yen following the much-anticipated policy decision by the Federal Reserve.
The dollar slid on Wednesday, as a surprise decline in U.S. inflation last month tempered expectations that the Federal Reserve would raise rates.
The dollar rose on Tuesday, as Wall Street rallied on solid retail sales data.
The dollar hit an almost three-week low ahead of this week's Federal Reserve meeting, as investors bet interest rates would be held.
The Swiss Franc has recently defied its decade-long safe haven status.
The dollar was lower on Friday in thin, listless trading ahead of next week's Federal Reserve policymaking meeting.
The dollar softened on Thursday as global stock markets turned down.
The dollar rose on Wednesday, following equities rallies on Wall Street, Europe and Asia.
Simon French, chief economist at Panmure Gordon, outlines his expectations for the Bank of England's policy meeting on Thursday.
The dollar was mixed as rising stock markets and positive German economic data gave global investors reasons to throttle down the risk aversion.
The dollar clawed back some of the ground it had lost against the yen on Monday, after skidding on mixed U.S. employment data.
The dollar stood lower on Friday as data showing U.S. unemployment in August at its lowest since 2008.
The euro fell 1 percent on Thursday, surrendering most of the solid gains put up against the dollar.