Urgent: U.S. stocks end mixed on Yellen's comments

U.S. stocks closed mixed Wednesday, as U.S. Federal Reserve Chair Janet Yellen signaled that the Fed still keeps door open to further interest rate hikes, but flagging risks could delay any further moves.

The Dow fell 0.62 percent, and the S&P 500 edged down 0.02 percent, while the Nasdaq rose 0.35 percent. Endit