JPMorgan Cries 'No Mas' At Petrobras, Warns Bulls By: Benzinga via Benzinga February 04, 2016 at 10:54 AM EST Shares of Petroleo Brasileiro SA Petrobras (ADR) (NYSE: PBR) have declined 50.87 percent over the past six months, down to a low ... Read More >> Related Stocks: Petrobras - Petroleo Brasileiro S.A.