美股科技股，集体上涨

Group 1 - Major tech stocks experienced a broad increase, with SanDisk rising over 8%, Oracle up 2%, and NVIDIA increasing by more than 1% [1][2] - Other notable gainers included Tesla, Broadcom, Apple, and Amazon, all showing positive movement [1] - The three major U.S. stock indices opened higher, with the Nasdaq up 0.77%, the Dow Jones up 0.41%, and the S&P 500 up 0.62% [3] Group 2 - Chinese concept stocks mostly rose, with Kingsoft Cloud increasing by over 11%, Bilibili up more than 3%, and Century Internet and Beike both rising over 2% [2][4] - Storage-related stocks rebounded, with Micron Technology rising over 6% and Western Digital increasing by more than 4% [4]