Morgan Stanley: Brazil Politics And Improved Oil Market Lifts Petrobas By: Benzinga via Benzinga March 22, 2016 at 07:36 AM EDT Morgan Stanley’s Bruno Montanari upgraded the rating for Petroleo Brasileiro SA Petrobras (ADR) (NYSE: PBR) from Underweight to ... Read More >> Related Stocks: Petrobras - Petroleo Brasileiro S.A.