U.S. stocks were higher, with the Dow Jones index gaining more than 350 points on Friday.Shares of White Mountains Insurance Group, Ltd. (NYSE:WTM) rose sharply during Friday's session after the company announced plans to sell a controlling interest in Bamboo, its technology-driven homeowners' insurance distribution platform, to funds advised by CVC Capital Partners.The deal values Bamboo at $1.75 billion. Operating in California and Texas, Bamboo specializes in data-enabled underwriting and distribution fo ...