The dollar rebounded early Thursday, a day after plunging against the euro.
Markets rallied Wednesday after the Federal Reserve signalled that it wasn't in a hurry to raise interest rates. A long period of ultra-low rates has helped lift stock and bond prices by keeping the cost of borrowing very low.
The Dow Jones industrial average fell 63 points, or 0.4 per cent, to 18,013 in early trading.
The Standard & Poor's 500 fell five points, or 0.3 per cent, to 2,093. The Nasdaq edged up nine points, or 0.2 per cent, to 4,992.
Bond prices rose. The yield on the 10-year Treasury note rose to 1.94 per cent.