The S&P 500 index finished lower on Friday for the ninth-straight session, its longest stretch of declines since December 1980. Stocks rose after the open as investors digested a strong report on October jobs growth. But they soon erased their gains as uncertainty surrounding next week's presidential election rattled markets. The S&P 500 SPX, -0.65% fell 3.44 points, or 0.2%, to 2,085.22, with consumer staples shares seeing the largest drop. The Dow Jones Industrial Average shed 41.84 points, or 0.2%, to 17,888.83, with Procter & Gamble Company PG, +0.04% and Travelers Companies Inc. TRV, +0.22% emerging as the biggest losers on the blue-chip gauge. The Nasdaq Composite COMP, -1.09% dropped 12.04 points, or 0.2%, to 5,046.37. Democratic nominee Hillary Clinton's lead in the polls over her Republican rival, Donald Trump, narrowed, which has been widely cited as a reason for the selloff.