沪深300汽车零配件指数报5908.85点，前十大权重包含德赛西威等

Group 1 - The Shanghai Composite Index opened lower and the CSI 300 Automotive Parts Index reported 5908.85 points [1] - The CSI 300 Automotive Parts Index has decreased by 4.17% in the past month, 6.66% in the past three months, and 6.83% year-to-date [1] - The CSI 300 Index categorizes its 300 sample stocks into 11 primary industries, 35 secondary industries, over 90 tertiary industries, and more than 200 quaternary industries [1] Group 2 - The CSI 300 Index samples are adjusted biannually, with adjustments occurring on the next trading day after the second Friday of June and December [2] - Weight factors are generally fixed until the next scheduled adjustment, but can change with temporary adjustments due to special events affecting sample companies [2] - Companies that are delisted or undergo mergers, acquisitions, or splits will be processed according to the calculation and maintenance guidelines [2]