Exxon lands with a thud; energy stocks up By: MarketWatch January 31, 2012 at 10:43 AM EST Shares of Exxon Mobil Corp. fall, but Helmerich & Payne jumps on earnings update. Read More >> Related Stocks: Chesapeake Energy EQT Corp Exxon Mobil Helmerich & Payne Southwestern Energy Standard & Poors 500 Valero Energy