Wall Street off lows; health stocks, weak reports drag

U.S. stocks moved off session lows on Thursday afternoon, but were still weighed down by a raft of weak earnings reports, while the healthcare sector fell after the U.S. launched a probe into drug prices. Facebook rose as much as 6.5 percent to $110.65 and gave the biggest boost to the S&P and Nasdaq. Half of the 10 major S&P sectors were lower, with the healthcare sector down 0.34 percent.