7月22日电，美股半导体股集体下行，AMD、美光科技跌超3%，博通、英伟达、台积电、恩智浦、迈威尔科技跌超2%。

Group 1 - The core viewpoint of the article indicates a collective decline in U.S. semiconductor stocks, with notable drops in major companies [1] Group 2 - AMD and Micron Technology experienced declines of over 3% [1] - Broadcom, NVIDIA, TSMC, NXP, and Marvell Technology saw declines exceeding 2% [1]