[BRIEFING.COM] No change to the prevailing trend as the afternoon session gets underway... It may be worth noting, however, that even as the major indices continue to improve their stance at the expense of further deterioration in oil prices, market breadth remains mixed, lending to the notion that most of the market's strength is being supported almost entirely by large-cap issues... As reflected in the A/D line, decliners on the NYSE still hold a slim 16 to 14 edge over advancers while advancing issues on the Nasdaq outpace declining issues by a modest 15 to 12 margin... A split ratio of down to up volume also paints more of a mixed picture at the Big Board and the Composite... ..NYSE Adv/Dec 1467/1611. ..NASDAQ Adv/Dec 1592/1250.