Wall Street flat ahead of Yellen after data ups rate hike odds

U.S. stocks were little changed on Wednesday, although the Dow and the Nasdaq managed to eke out record intraday highs, as investors assessed a spate of strong economic data and awaited Federal Reserve Chair Janet Yellen's testimony. Yellen's testimony before the House Financial Services Committee starts at 10:00 a.m. ET and comes a day after she said delaying a rate hike would be unwise, without indicating when the Fed would pull the trigger.