US stocks give up an early gain and move lower; Yahoo down

NEW YORK (AP) — The stock market was heading for a second loss in a row Wednesday. Banks and retailers, which would stand to lose the most if the economy slows down, led the declines.Chipotle Mexican Grill fell sharply as the company disclosed a federal investigation into its E. coli outbreak, and Yahoo sank as the troubled Internet company announced layoffs and plans to sell businesses.
KEEPING SCORE: The Dow Jones industrial average lost 15 points, or 0.1 percent, to 16,135 as of 12:15 p