A股午评：今天大跌在3821，若无意外，午后或将重演历史行情

Market Overview - The Shanghai Composite Index closed at 3821.68 points, down 0.34%, while over 3200 stocks rose, indicating a divergence between the index and individual stock performance [1][2]. - The total trading volume was 1.03 trillion yuan, a decrease of nearly 300 billion yuan compared to the previous day, suggesting that funds are waiting for direction [5]. Sector Performance - Defensive sectors such as military and wind power showed strength, with multiple stocks hitting the daily limit, while technology stocks experienced significant internal divergence [5][6]. - Semiconductor and AI sectors saw a narrowing of losses, with some leading stocks showing signs of accumulation, indicating potential recovery [6]. Capital Flow - The market is witnessing a classic scenario where defensive sectors attract capital, while technology stocks face mixed performance [6][8]. - Northbound capital saw a net outflow of 7.5 billion yuan, which could trigger follow-up selling if the trend continues [8]. Historical Context - The current market behavior resembles previous instances in late August and mid-September, where significant index movements followed periods of low trading volume at key support levels [5][6]. - Historical data suggests that sudden movements in brokerage stocks without accompanying volume can lead to false signals, as seen on September 18 [8].