U.S. stocks opened little changed on Tuesday as investors await an expected interest rate increase by the Federal Reserve and hints on the timing and pace of future tightening. The Dow Jones industrial average <.DJI> slipped 4.94 points, or 0.05 percent, to 10,352.15. The Standard & Poor's 500 Index <.SPX> dipped 0.59 point, or 0.05 percent, to 1,132.76. The technology-laced Nasdaq Composite Index <.IXIC> fell 2.15 points, or 0.11 percent, to 2,017.67.///