Wall St. falls as weak earnings dent optimism; oil drags

Verizon fell 2.3 percent, dragging the most on the S&P, after the wireless carrier reported a drop in quarterly revenue. The telecom services sector tumbled 1.9 percent, the most among the 11 major S&P 500 indexes. Microsoft , scheduled to report after the bell, fell 1.3 percent, weighing the most on the Nasdaq.