Companies Petroleo Brasileiro Petrobras SA (ADR) (PBR), Thermo Fisher Scientific Inc. (TMO) and Citigroup Inc (C) are Stocks to Watch Out For: Jim CramerBy Viki K.July 17, 2014 Jim Cramer of CNBC discussed about Petroleo Brasileiro Petrobras SA (ADR) (NYSE:PBR), Thermo Fisher Scientific Inc. (NYSE:TMO) and Citigroup Inc…