Barclays Adjusts Ratings For Major Refineries By: Benzinga via Benzinga July 25, 2014 at 14:43 PM EDT In a report released Friday, Barclay analyst Paul Cheng released coverage on major oil companies such as Petroleo Brasileiro ... Read More >> Related Stocks: Chevron Corp ConocoPhillips Exxon Mobil Petrobras - Petroleo Brasileiro S.A. Suncor Energy Inc