US Stocks Fall; DJIA, S&P 500 At Lowest Closes Since Oct

there. The announcement weighed on other health-care companies. Cigna dropped 1.20, or 3.9%, to 29.86, Humana slipped 1.08, or 2.4%, to 44.59, and Coventry Health Care slid 49 cents, or 2.8%, to 17.19. Dendreon (Nasdaq) dropped 2.20, or 6.8%...