Energy stocks rally, top gainer among S&P sectors By: MarketWatch May 20, 2013 at 13:16 PM EDT Energy stocks rise, the top gainer in the S&P 500 Index, standing head and shoulders above other sectors and up 4.3% on the day. Read More >> Related Stocks: Anadarko Petroleum Chesapeake Energy ConocoPhillips Energy Select Sector SPDR Exxon Mobil Wpx Energy Inc