US stocks close higher amid European signals of progress

US stocks mostly extended gains on Tuesday as markets monitored European summit in Brussels, hoping for progress in tackling debt crisis. Standard & Poor's 500 Index gained 0.22% or 2.64 points closing at 1,195.19. Dow Jones Industrial Average Index edged up 0.3% or 32.62 points to 11,555.63. Nasdaq Composite Index did not follow its major peers and fell 0.5% or 11.83 points to 2,515.51.