科创板收盘播报：科创综指涨2.55% 逾九成个股收涨

Market Performance - The two major indices of the Sci-Tech Innovation Board opened higher on October 21, with significant gains observed during the morning session, leading to a closing increase. The Sci-Tech 50 Index closed at 1406.32 points, up 2.81%, with a total trading volume of approximately 763 billion yuan. The Sci-Tech Comprehensive Index closed at 1618.23 points, up 2.55%, with a total trading volume of about 1909 billion yuan, showing an increase in trading volume compared to the previous trading day [1][2]. Stock Performance - Over 90% of stocks on the Sci-Tech Innovation Board rose on the same day, with semiconductor, specialized machinery, and component stocks showing the highest overall gains. The average increase for 589 stocks on October 21 was 2.12%, with an average turnover rate of 2.51%, and a total trading volume of 1908.54 billion yuan, alongside an average volatility of 3.91% [2]. Individual Stock Highlights - Notable individual stock performances included Zhengyuan Dixin, Fangyuan Co., Yunzhu Technology, and Yuanjie Technology, all reaching approximately 20% limit up. Conversely, Huasheng Lithium fell by 5.37%, marking the largest decline [2]. Trading Volume Insights - In terms of trading volume, Hanwujing led with a trading volume of 192.41 billion yuan, while *ST Guandian had the lowest trading volume at 709.3 million yuan [3]. Turnover Rate Analysis - Zhengyuan Dixin had the highest turnover rate at 19.66%, while Zhongke Weizhi recorded the lowest turnover rate at 0.22% [4].