Vetr Top Raters Downgrade Petrobras, 72% Remain Bullish By: Benzinga via Benzinga February 23, 2016 at 12:13 PM EST Shares of Petroleo Brasileiro SA Petrobras (ADR) (NYSE: PBR) have lost nearly 20 percent since the start of 2016 and more than 45 ... Read More >> Related Stocks: Petrobras - Petroleo Brasileiro S.A.