午评：微盘股指数半日涨超2% 并购重组、ST股集体大涨

Market Overview - The micro-cap stock index rose over 2% during the morning session, while the three major indices experienced slight declines [1] - The total trading volume in the Shanghai and Shenzhen markets reached 707.5 billion, an increase of 41.8 billion compared to the previous trading day [1] - A total of 2,900 stocks in the market saw gains, indicating a broad-based upward movement [1] Sector Performance - Mergers and acquisitions, as well as ST stocks, saw significant gains, with companies like Guangzhi Technology hitting the daily limit [1] - Port and shipping stocks strengthened again, with Lianyungang also reaching the daily limit [1] - Controlled nuclear fusion concept stocks maintained strong performance, with Wangzi New Materials hitting the daily limit [1] - In contrast, the robotics sector faced adjustments, with Longxi Co. hitting the daily limit down [1] Index Performance - By the end of the session, the Shanghai Composite Index fell by 0.09%, the Shenzhen Component Index decreased by 0.36%, and the ChiNext Index dropped by 0.53% [1] Limit-Up Performance - The limit-up rate was recorded at 78%, with 60 stocks hitting the limit and 17 stocks touching the limit [4] - The opening rate was 77%, and the profit rate stood at 66% [4]