fell 3.3 percent to $41.83 after a cautious 2013 outlook.
Generic drugmaker Perrigo reported a better-than-expected second-quarter profit and its shares jumped 4.7 percent to $105.28.
Of the 252 companies in the S&P 500 that have reported earnings so far, 69 percent have exceeded expectations, according to Thomson Reuters data. That is a higher proportion than over the past four quarters and above average since 1994.
Overall, S&P 500 fourth-quarter earnings are estimated to have grown 4.4 percent, according to the data, up from a 1.9 percent forecast at the start of the earnings season but well below a 9.9 percent profit growth forecast on Oct. 1.
Dell Inc gained 2.9 percent to $13.63 after sources said the company was nearing an agreement to sell itself to a buyout consortium led by its founder, Michael Dell, and private equity firm Silver Lake Partners.