U.S. Markets are poised to end the trading week in the red. Stocks are lower Friday afternoon as investors shrugged off a University of Michigan's index on consumer sentiment index which showed an improvement in June. DuPont (DD) is weighing on the markets. The chemicals maker is trading sharply lower after reducing its outlook for the second quarter and full year. Shares of Dollar General (DG) are also down after the company announced its Chairman and CEO will retire by 2015. But Green Mountain is keeping the Nasdaq up. The stock is moving higher after Argus upgraded it to a "buy" from "hold" The firm expects sales of K-Cups and brewers to increase. TheStreet's Susannah Lee reports from New York.