[U.S. Stock Market Opening: Major U.S. Stock Indexes Open Lower] The three major U.S. stock indexes opened lower, with the S&P 500 down 0.23%, the Dow Jones down 0.39%, and the Nasdaq down 0.18%. In large-cap tech stocks, Amazon fell 1.14%, Google A fell 1.16%. For Chinese concept stocks, Trip.com rose 1.39%, Pinduoduo fell 1.55%, Alibaba fell 2.09%.