In company news, American depository shares of Petroleo Brasileiro SA ( PBR ), the majority state-owned Brazilian energy company more commonly known as Petrobras, tumbled Monday after Dilma Rousseff was re-elected Brazil President yesterday, defeating a pro-business opponent in a run-off. As President, Rousseff appoints PBR's chief executive and a majority of its board seats. During her first four years in office, the former Petrobras board chairwoman (from 2003 to 2010) has imposed strong price controls on the company to keep retail prices low and control inflation but also limiting PBR profits.