U.S. stocks opened mixed Tuesday as heavy losses in semiconductor shares pressured the Nasdaq Composite, while strong corporate earnings helped the Dow Jones Industrial Average climb. The Nasdaq chart shows the index below its 50-day exponential moving average near 25,625. A recovery above the moving average would strengthen the near-term outlook, while continued trading below it would keep pressure on technology shares. The S&P 500 daily chart shows the index consolidating below its 50-day moving average near 7,472 but above its 200-day average near 7,008. However, deeper chip losses could continue weighing on the Nasdaq and S&P 500, while steady earnings and lower Treasury yields could help the Dow maintain its lead.