科创板收盘播报：科创综指跌2.71% 近九成个股收跌

Market Performance - The Sci-Tech 50 Index opened slightly lower on September 2, initially rising before declining approximately 1.6%, then briefly rebounding before falling again, closing down 2.13% at 1328.28 points with a total trading volume of about 901 billion [1] - The Sci-Tech Comprehensive Index also opened slightly lower and experienced a downward trend throughout the day, ultimately closing down 2.71% at 1584.16 points, with a total trading volume of approximately 3041 billion, which was a slight increase compared to the previous trading day [1] - Nearly 90% of stocks on the Sci-Tech board closed lower, with significant declines in the main board CPO concept and communication equipment sectors, affecting related stocks on the Sci-Tech board [1] Individual Stock Performance - Upwind New Materials saw the highest increase, rising by 14.66%, while Dekoli experienced the largest decline, falling by 14.63% [2] - In terms of trading volume, Cambrian's trading volume reached 257.31 billion, ranking first, while ST Pava had the lowest trading volume at 1.148 million [3] - Gold Orange had the highest turnover rate at 24.88%, while Longteng Optoelectronics had the lowest turnover rate at 0.40% [3]