Chevron gains on upgrade, energy stocks drop By: MarketWatch July 12, 2012 at 10:32 AM EDT Weaker crude oil and equities prices weigh on energy stocks, but a J.P. Morgan upgrade of Chevron helps the oil major move into positive territory. Read More >> Related Stocks: Chevron Corp Denbury Resources Energy Select Sector SPDR Exxon Mobil Marathon Petroleum PHLX Oil Service Sector Index Wpx Energy Inc