The U.S. dollar briefly pared its early losses, then moved lower again after the Federal Reserve left interest rates unchanged.
Fed policymakers, however, made no direct indication that a rate increase is coming at the December meeting, a move that the market is strongly anticipating. In fact, the dovish FOMC majority gained a vote.
Earlier Wednesday, the dollar hit its lowest level in more than three weeks against the euro, yen, Swiss franc and sterling on Wednesday on continued nervousness about a potential victory for U.S. Republican presidential candidate Donald Trump next week.
Investors are rethinking long-held bets on a Nov. 8 victory for Democrat Hillary Clinton. Clinton held a 5 percentage point lead over Trump, according to a Reuters/Ipsos opinion poll released on Monday, but some other polls showed her Republican rival ahead by 1-2 percentage points.