A股突然跳水大跌！发生了什么？

Market Overview - The market experienced a significant drop in the afternoon despite the favorable news of a 25 basis point interest rate cut by the Federal Reserve, with the Shanghai Composite Index falling over 2% at one point [4][5] - By the end of the trading day, the Shanghai Composite Index closed down 1.15%, the Shenzhen Component Index down 1.06%, and the ChiNext Index down 1.64% [5] Market Performance - A total of 1,027 stocks rose, with 64 hitting the daily limit up, while 4,350 stocks declined [6] - The total trading volume reached approximately 31.67 billion CNY, with a total of 196.27 million shares traded [7] Sector Performance - Tourism stocks showed resilience, with Yunnan Tourism and Qujiang Cultural Tourism hitting the daily limit up [8] - CPO and other computing hardware stocks were active, with Dekeli and Changfei Fiber Optics also hitting the daily limit up [10] - Semiconductor stocks saw a brief surge before retreating, with companies like Zhongwei and Saiwei Microelectronics rising over 10% [12] Reasons for Market Movement - The initial market rally was attributed to the Federal Reserve's interest rate cut, but profit-taking occurred due to previous rapid gains [16] - Abnormal trading patterns were noted, particularly in brokerage stocks, which faced significant selling pressure [16]