Major stock indexes ended the day lower after wavering between gains and losses during Fed Chairman Jerome Powell's first press conference.

The S&P 500 and Dow industrials both slid 0.2%, while the Nasdaq fell 0.3%.

The yield on the 10-year Treasury note was recently little changed on the day at 2.883%, reversing an earlier rise immediately after the Fed statement was released.

The WSJ Dollar Index, which measures the U.S. currency against 16 peers, was down 0.8%, falling sharply against the Canadian dollar and Mexican peso. The greenback was also down versus the Japanese yen and euro.