Petrobras Shares Underperform Despite JPMorgan Upgrade By: Benzinga via Benzinga May 24, 2016 at 15:44 PM EDT ADRs of Petroleo Brasileiro SA Petrobras (ADR) (NYSE: PBR) have underperformed, despite a recent upgrade from JPMorgan. Rating And ... Read More >> Related Stocks: Brent Crude Petrobras - Petroleo Brasileiro S.A. United States Oil Fund iPath Dow Jones-Goldman Sachs Crude Oil Fund