US stock markets experienced mixed trading, with the S&P 500 and Dow Jones Industrial Average closing lower due to financial sector declines, while the Nasdaq saw gains driven by AI-related stocks like Nvidia and Alphabet. The S&P 500 fell 0.34% to 6,920.93, the Nasdaq rose 0.16% to 23,584.28, and the Dow Jones dropped 0.94% to 48,996.08.