In corporate news, shares of Chiron Corp fell a day after the biopharmaceutical company said it is delaying shipment of its flu vaccine, Fluvirin.
The Dow Jones industrial average added 13.78 points, or 0.14 percent, to 10,187.19. The Standard & Poor's 500 Index gained 1.77 points, or 0.16 percent, to 1,106.86. The technology-laced Nasdaq Composite Index rose 8.93 points, or 0.48 percent, to 1,861.85.