[The AI ​​hardware industry chain plummeted across the board, with the Philadelphia Semiconductor Index falling more than 7% and many stocks falling more than 10%] On November 5, the U.S. AI hardware industry chain suffered a collective sell-off, with the chip, storage, semiconductor equipment and optical communications sectors generally falling sharply. The Philadelphia Semiconductor Index fell 7.25%. In terms of chip stocks, AMD fell 12.94%, Nvidia fell 5.33%, TSMC fell 6.99%, Broadcom fell 5.35%, Intel fell 8.12%, Qualcomm fell 9.00%, and Arm fell 10.65%. In terms of storage and hard disk stocks, SanDisk fell 13.77%, Western Digital fell 12.78%, Seagate Technology fell 12.74%, Micron Technology fell 10.78%, and SK Hynix fell 9.41%. In terms of semiconductor equipment and optical communication stocks, Marvel Technology fell 10.03%, Lumentum fell 12.21%, Coherent fell 10.53%, Applied Materials fell 7.15%, Lam Group fell 8.66%, and ASML fell 5.98%. In addition, the triple long semiconductor ETF fell 23.44%, a decline significantly higher than the semiconductor index.