Market Updates: Citigroup (NYSE:C), Yahoo (NASDAQ:YHOO), (NASDAQ:GOOG), Berkshire Hathaway (NYSE:BRKA)

U.K. stocks rallied, led by International Power Plc amid reports GDF Suez SA is considering a tie-up with the electricity producer. Mining companies advanced with higher metal prices. International Power jumped 7.7 percent to a 15-month high. BHP Billiton Ltd. led mining shares higher as Citigroup (NYSE:C) added the company to its “most favored” list of stocks and copper climbed in London. Cadbury Plc climbed 1.7 percent on speculation Kraft Foods Inc. will raise its bid for the British confectioner. - Bloomberg Yahoo (NASDAQ:YHOO ) was drawn into the growing international cyber-war between Google (NASDAQ:GOOG) and the Chinese government Saturday after it declared its support…