U.S. stocks closed mostly lower on Friday after easing trade tensions and central bank policy moves briefly buoyed investor sentiment earlier in the day. The S&P 500 SPX, -0.49% was down less than 0.1% to end near 3,007. The Dow Jones Industrial Average DJIA, -0.59% advanced 36 points, or 0.1%, to finish around 27,219, based on preliminary numbers.The Nasdaq Composite COMP, -0.80% fell 0.2% to end near 8,177. The blue-chip Dow clinched its eighth consecutive gain, its longest such streak since 2018. Both the Dow and the S&P remain less than a percentage point away from their all-time highs set in July. Retail sales rose faster than expected in August, increasing by 0.4%. Investors also saw signs that Washington and Beijing were moving towards a more constructive stance on trade negotiations. The European Central Bank announced a full stimulus package on Thursday, including rate cuts and the restart of an open-ended bond purchasing program.