U.S. stocks are opening slightly higher as technology companies and retailers make gains. Drugmakers and other health care companies are trading lower. Stocks have declined over the last two weeks. Trading is expected to be relatively quiet ahead of the Thanksgiving holiday later this week. KEEPING SCORE: The Standard & Poor's 500 index picked up 2 points, or 0.1 percent, to 2,580 as of 10 a.m. Eastern time. The Dow Jones industrial average gained 55 points, or 0.2 percent, to 23,414.