Wallstreetcn.com analysis indicates a clear divergence in the US stock market on Thursday (October 22), with technology stocks experiencing a significant downturn. The Nasdaq Composite Index fell by 2.6%, the Philadelphia Semiconductor Index plummeted by 6.7%, and the S&P 500 Index dropped by 1.2%, marking its largest single-day decline since July. Concurrently, the 10-year US Treasury yield fell by 19.3 basis points to 4.952%, its largest single-day drop since the banking crisis in March 2023. This market action suggests that the sell-off in technology stocks has not yet evolved into a broad market decline, and investor sentiment towards AI-related trades is shifting, potentially signaling a new round of style rotation in the market.