Group 1 - The core index of the China Securities Big Data Industry Index (930902) closed down 0.58% at 2875.61 points, with a trading volume of 22.909 billion yuan [1] - Over the past month, the index has increased by 2.28%, decreased by 5.63% over the past three months, and has risen by 1.63% year-to-date [1] - The index reflects the overall performance of listed companies involved in big data storage, analysis, operation, production, and application [1] Group 2 - The top ten weighted companies in the index include Zhongke Shuguang (10.5%), Keda Xunfei (9.62%), Inspur Information (5.4%), and others [1] - The market share of the index's holdings is 64.73% from the Shenzhen Stock Exchange, 34.79% from the Shanghai Stock Exchange, and 0.48% from the Beijing Stock Exchange [1] - The industry composition of the index shows that information technology accounts for 74.39%, communication services for 24.10%, and industry for 1.51% [2] Group 3 - The index samples are adjusted every six months, with adjustments implemented on the next trading day after the second Friday of June and December [2] - Weight factors are generally fixed until the next scheduled adjustment, with special cases allowing for temporary adjustments [2] - Public funds tracking the index include multiple funds from Fuguo and Huaxia, as well as ETFs from Fuguo, Huaxia, and Huabao [2]