美股三大指数集体高开，道指涨0.21%，纳指涨1.51%，标普500指数涨0.93%。芯片股集体走强，英伟达涨超5%，美光科技、博通涨超2%。

Group 1 - The three major U.S. stock indices opened higher, with the Dow Jones up 0.21%, the Nasdaq up 1.51%, and the S&P 500 up 0.93% [1] - Chip stocks showed strong performance, with Nvidia rising over 5%, and Micron Technology and Broadcom both increasing by over 2% [1]