Barclays takes ratings ax to oil and gas producers By: MarketWatch January 14, 2015 at 11:36 AM EST Energy companies are among the top decliners Wednesday after Barclays downgrades several exploration and production companies. Read More >> Related Stocks: Antero Resources Corp Canadian Natural Resources Limited Chesapeake Energy Cimarex Energy Concho Resources Inc Continental Resources Devon Energy EOG Resources Kosmos Energy Ltd Marathon Oil Noble Energy RSP Permian, Inc. Common Stock Range Resources Standard & Poors 500