U.S. stocks were little changed Wednesday, closing mostly lower after the Standard & Poor's 500 and Nasdaq indexes hit intraday record highs. The Dow Jones industrial average fell 27.88, or 0.1 percent, to 28,239.28. The broader S&P 500 index was little changed, falling 1.38 to 3,191.14. The technology-heavy Nasdaq composite index also was little changed, rising 4.38 to 8,827.74.