[U.S. Stock Market Opens, Three Major Indexes Decline, META Rises Over 5%] BlockBeats News, September 9, according to BIT (bit.com) market data, U.S. stock market opened with the Dow Jones down 0.15%, the S&P 500 index down 0.25%, and the Nasdaq down 0.36%. Meta Platforms (META) rose over 5% as the company launched its personal AI agent, Muse. Amazon (AMZN) fell 1.2% after issuing its first four-part pound-denominated bond. Apple (AAPL) dipped slightly by 0.2% ahead of its major launch event.