FXstreet.com (San Francisco) - U.S. stocks posted modest gains on Friday with the Dow and S&P finishing higher for a sixth successive week, while the Nasdaq gained for the past five weeks. Expectations of more central bank action and a rise in consumer sentiment in August boosted shares, but trading was relatively listless Friday. The Dow added 25.09 points, or 0.2% to 13,275.20. The Nasdaq ended up 14.20 points, or 0.5% to 3,076.59. The S&P 500 gained 2.65 points, or 0.2% to 1,418.16.