U.S. Stocks Slide as Treasury Selloff Deepens — Update

By Dean SealU.S. stocks started the week on a down note following the latest setback for peace talks in the Middle East and a deepening of last week's selloff in U.S. Treasurys.The S&P 500 fell 59.7 points, or 0.77%, to 7683.69. The Dow Jones Industrial Average dropped 347.1 points, or 0.67%, to 51…