US equities (^DJI, ^IXIC, ^GSPC) closed Friday's session in negative territory — led by the Nasdaq Composite's 1.4% drop — all three of the market indexes seeing weekly losses amid the recent sell-off in semiconductor stocks. Yahoo Finance Markets and Data Editor Jared Blikre examines the day's market moves, taking a closer look at the losses in semiconductor stocks and the gains seen across the software landscape.