Petrobras Post Reveal: Cowen Is Resetting Expectations By: Benzinga via Benzinga April 24, 2015 at 10:26 AM EDT In a report published Friday, Cowen & Co analysts maintained a Market Perform rating on Petroleo Brasileiro Petrobras SA (NYSE: PBR), ... Read More >> Related Stocks: Petrobras - Petroleo Brasileiro S.A.