Shares of Chevron, Alpha Natural heat up sector By: MarketWatch September 14, 2012 at 11:21 AM EDT Petroleum stocks push further into positive territory for the year as crude futures tip $100 a barrel. Read More >> Related Stocks: Chevron Corp Energy Select Sector SPDR Exxon Mobil First Solar Halliburton Co PHLX Oil Service Sector Index Pioneer Natural Resources Standard & Poors 500 Valero Energy