S&P 500 edges lower; tech, utility losses offset energy rally

News that OPEC agreed to cut production drove U.S. oil prices up 9.3 percent, causing the S&P 500 energy index to rally 5.1 percent and bond yields to jump. The S&P utility index was down 2.7 percent, while shares of AT&T fell 1.7 percent. Technology shares also dropped, including Microsoft, which was down 1.1 percent.