US stock indices were mixed on Wednesday as Treasury yields rose. At 9:50 a.m. ET, the Dow Jones Industrial Average was up 54.74 points, or 0.14%, at 39,060.23, the S&P 500 was down 7.63 points. The yield on the 10-year Treasury rose to 4.17 per cent from 4.15 per cent late on Tuesday.