Nexen rallies as investors bet on Cnooc’s bid By: MarketWatch July 23, 2012 at 13:06 PM EDT Analyst downgrades Nexen to sell on risk of deal not getting OK’d Read More >> Related Stocks: Bhp Billiton Ltd ADR Chesapeake Energy Cnooc Ltd Devon Energy Imperial Oil Limited Macy's PetroChina Potash Corporation of Saskatchewan Sinopec Shangai Petrochemical Company Ltd ADR Suncor Energy Inc