[U.S. technology stocks sold off: Apple is the only technology stock with a market value of more than one trillion U.S. dollars this week to close up, and the optical communications and storage sectors are the hardest hit] October 17th, U.S. artificial intelligence-related technology stocks were sold off again this week, with the Philadelphia Semiconductor Index falling by more than 11% for the week, the largest weekly decline since April 2025. The combined market value of technology stocks with a market value of more than US$1 trillion has shrunk by nearly US$1.1 trillion this week. SpaceX fell by more than 10%, Broadcom fell by more than 9%, Tesla fell by more than 7%, and Nvidia fell by more than 6%; only Apple closed up. The optical communications and storage sectors have become the hardest hit areas, with the storage concept index falling by more than 17% on a weekly basis, the largest weekly decline since April 2025. Micron Technology and SK Hynix exited the trillion-dollar market capitalization ranks; Coherent, Coherent, Ciena, and Kioxia all fell by more than 25%. Nvidia CEO Jensen Huang expressed optimism about the latest plunge in artificial intelligence stocks, saying the benefits of the technology will soon ease investor concerns.