Energy stocks inch up; Pioneer, WPX top gainers By: MarketWatch May 22, 2013 at 11:57 AM EDT Energy stocks edge higher, losing some steam alongside the broader U.S. equity market as Fed Chairman Bernanke said Fed bond-buying could taper off. Read More >> Related Stocks: Chesapeake Energy Chevron Corp ConocoPhillips Energy Select Sector SPDR Exxon Mobil Murphy Oil Noble Energy Pioneer Natural Resources Southwestern Energy Wpx Energy Inc