Monday was a strong day on Wall Street, with the Dow Jones Industrials and S&P 500 hitting record highs on new optimism from market participants. The technology sector, which has gotten hit hard recently, bounced back from its losses, and continued strength from other pockets of the market helped add to the overall enthusiasm among investors. Some comments from a Federal Reserve official suggested that tightening monetary policy would continue, but investors seemed to take that as a sign that the U.S. economy would remain strong.