Stock Market: On Tuesday, the three major U.S. stock indices collectively closed lower. The Dow Jones index closed down 0.07% at 42544.22 points, the S&P 500 index closed down 0.00% at 5881.63 points, and the Nasdaq Composite index closed down 0.91% at 19310.79 points. The three major A-shares indices collectively closed lower, with the Shanghai Composite index down 1.57% at 3353.74 points, the Shenzhen Component index down 2.40% at 10414.61 points, and the ChiNext index down 2.87% at 2143.05 points.