BP p.l.c. (NYSE:BP) announced Friday it would buy several US oil and shale assets from mining firm BHP Billiton Ltd. (NYSE:BBL) for USD 10.5 billion.The deal is the largest by BP in two decades and its first significant investment in the United Stat..

Exxon Mobil Corp. (NYSE: XOM) announced Friday it will be investing $4.4 billion to develop part of the Liza oilfield off the coast of Guyana. According to a Reuters report, Exxon's decision shows that oil companies remain interested i..