沪深300汽车零配件指数报5704.23点，前十大权重包含德赛西威等

Group 1 - The Shanghai Composite Index decreased by 0.37%, while the CSI 300 Automotive Parts Index reported at 5704.23 points [1] - The CSI 300 Automotive Parts Index has declined by 2.74% over the past month, 4.62% over the past three months, and 10.06% 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 Automotive Parts Index has a market composition of 87.97% from the Shanghai Stock Exchange and 12.03% from the Shenzhen Stock Exchange [1] - Within the CSI 300 Automotive Parts Index, the industry breakdown shows that interior and exterior automotive parts account for 56.43%, system components for 17.07%, tires for 14.47%, and automotive electronics for 12.03% [1] Group 3 - The 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 handled according to specific calculation and maintenance guidelines [2]