Xin Hua Cai Jing·2025-08-21 07:54Core Points - The Sci-Tech Innovation 50 Index experienced a slight increase, closing at 1149.15 points with a gain of 0.09% and a trading volume of approximately 657.2 billion [1] - Most stocks on the Sci-Tech board declined, with 165 stocks rising; high-priced stocks showed mixed performance while low-priced stocks mostly fell [1] - In specific sectors, stocks related to environmental protection, healthcare, and biopharmaceuticals were active, whereas semiconductor, communication equipment, and electrical equipment stocks declined [1] Trading Performance - On August 21, the average decline for 589 stocks on the Sci-Tech board was 0.93%, with an average turnover rate of 3.82% and a total trading volume of 217.6 billion [1] - The average volatility for the stocks was 4.64% [1] Individual Stock Performance - Sanwei Xinan led the gainers with a 20% increase, while Dongxin Co. had the largest decline at 12.37% [2] - Cambrian's trading volume was the highest at 11.93 billion, while ST Pava had the lowest at 1.439 million [3] Turnover Rate - Yingshi Innovation had the highest turnover rate at 23.30%, while Bairen Medical had the lowest at 0.28% [4]