US stocks close mixed as semiconductor shares plunge

The three major U.S. stock indices closed mixed today. - S&P 500: -0.16% - Nasdaq: -0.7% - Dow Jones: +0.1% The downturn was driven by a sharp sell-off in semiconductor stocks. Qualcomm (QCOM) plunged 11%, while Micron Technology (MU) fell 3.5%. Intel (INTC) and SanDisk (SNDK) each dropped by more than 6%.