Stocks started on separate paths Friday, as the S&P 500 rose and the Nasdaq fell, but by the close both indexes were in the red. The Nasdaq axed off 2.3%, while the S&P 500 lost 1.1%. The IBD 50 severed 2.9%. Volume rose across the board. The difference for the indexes was tied to the slaughter in semiconductor stocks, most of which are listed on the Nasdaq.