5月13日讯，美股开盘，三大股指涨跌不一，道指跌0.4%，标普500指数涨0.1%，纳指涨0.2%。京东(JD.O)绩后跌1.5%。腾讯音乐(TME.N)跌5%。联合健康(UNH.N)跌11%，公司暂停2025年展望。英伟达(NVDA.O)涨1.4%，美媒称美国将推动沙特获得人工智能芯片。

Group 1 - The three major U.S. stock indices opened mixed, with the Dow Jones Industrial Average down by 0.4%, the S&P 500 up by 0.1%, and the Nasdaq up by 0.2% [1] - JD.com (JD.O) experienced a decline of 1.5% following its earnings report [1] - Tencent Music (TME.N) saw a drop of 5% [1] Group 2 - UnitedHealth (UNH.N) fell by 11% after the company suspended its 2025 outlook [1] - NVIDIA (NVDA.O) increased by 1.4%, with reports indicating that the U.S. will push for Saudi Arabia to obtain artificial intelligence chips [1]