in a light session ahead of Federal Reserve chairman Greenspan's talk to Congress. The S&P 500 slipped 0.06 to 1109.38, while the Nasdaq Composite slipped 3.02 to 1766.86. The Dow Industrials lost 30.45 to 10115.26. Volumes turned light after a run of moderately active sessions. Accounting worries eased again with no significant corruption stories to report. Dealers said the unexpected drop in the U.S. Conference Board's consumer confidence index was the biggest event of the day. Spurious reports of U.S. troops landing in Iraq raised some confusion at mid-morning, but did little to hurt the market. The reports were denied by the Pentagon.