US stocks edged lower on Friday, building on three days of losses as data showed consumers saw little improvement ahead for the economy. The Dow Jones industrial average fell 17.48 points, or 0.17 percent, at 10,302.47. The Standard & Poor's 500 Index dipped 3.13 points, or 0.29 percent, at 1,080.48. The Nasdaq Composite Index was down 12.91 points, or 0.59 percent, at 2,177.36. If the indexes close lower on Friday, it could be the biggest weekly decline in six weeks.