Estimated quarterly earnings for Exxon Mobil Corp. were down about 60 percent from last year, the company said, pointing to sharply lower energy prices. Exxon reported second quarter earnings at $1.7 billion, compared with $4.2 billion during the same quarter for 2015. “While our financial results reflect a volatile industry environment, ExxonMobil remains focused on business fundamentals, cost discipline and advancing selective new investments across the value chain to extend our competitive advantage,” Chairman and CEO Rex Tillerson said in a statement. First quarter earnings of $1.8 billion were the weakest in more than a decade for Exxon as lower commodity prices and weaker refining margins took their toll . […]