U.S. stock indexes edged lower in early trading Thursday, pulling back slightly from the market's latest record highs. Losses by health care stocks and other sectors were outweighing gains by technology companies. Energy stocks also fell as crude oil prices declined. KEEPING SCORE: The Standard & Poor's 500 index fell 3 points, or 0.1 percent, to 2,799 as of 10:14 a.m.