美股三大指数集体高开，道指涨0.21%，纳指涨0.46%

Market Performance - The three major U.S. stock indices opened higher on September 15, with the Dow Jones up 0.21%, the Nasdaq up 0.46%, and the S&P 500 up 0.35% [1] Company Highlights - Tesla shares rose over 6% following Elon Musk's purchase of more than 2.5 million shares of the company [1] - Hesai Technology's stock increased by 3% after the company signed a laser radar order worth over $40 million with a Robotaxi company [1]