美股三大指数开盘涨跌不一，超微电脑涨超5%

Market Overview - On September 12, U.S. stock indices opened mixed, with the Dow Jones down 0.07%, the S&P 500 up 0.05%, and the Nasdaq up 0.15% [1] Company Highlights - Advanced Micro Devices (AMD) saw a rise of over 5% after announcing the delivery of high-capacity NVIDIA Blackwell Ultra systems [1] - Adobe experienced an increase of over 3% following the company's upward revision of its annual revenue and profit forecasts [1] - Warner Bros. Discovery surged over 8%, building on a previous trading day increase of over 28%, amid news that Paramount Global is preparing to bid for the company [1]