U.S. stocks fell during Monday's trading session due to setbacks in Middle East peace talks and an intensification of the U.S. Treasury sell-off. The S&P 500 index dropped 0.77% to 7683.69 points, the Dow Jones Industrial Average fell 0.67% to 51481.51 points, and the Nasdaq Composite index declined 0.92% to 26820.38 points.