Energy stocks are worst S&P 500 performers By: MarketWatch June 04, 2013 at 13:30 PM EDT Energy stocks fall, the worst sector performer in the S&P 500 Index, as equity investors watch for any clues about U.S. Federal Reserve’s next moves. Read More >> Related Stocks: Chevron Corp ConocoPhillips Energy Select Sector SPDR Exxon Mobil Kinder Morgan QEP Resources Range Resources Tesoro Petroleum Co Valero Energy Wpx Energy Inc