Jin Rong Jie·2025-07-09 10:13Core Points - The A-share market's three major indices closed mixed, with the CSI 300 Infrastructure Theme Index reporting at 2163.03 points [1] - The CSI 300 Infrastructure Theme Index has increased by 0.51% over the past month, 0.96% over the past three months, and has decreased by 2.43% year-to-date [2] Index Composition - The CSI 300 Infrastructure Theme Index is composed of infrastructure-related listed companies selected from the CSI 300 Index, providing investors with a diversified investment option [2] - The index was established on December 31, 2004, with a base point of 1000.0 [2] - The top ten weighted companies in the index are: - China Yangtze Power (14.9%) - China State Construction Engineering (8.74%) - China Telecom (8.45%) - China Mobile (7.25%) - China Unicom (6.01%) - China Nuclear Power (5.51%) - Three Gorges Energy (4.37%) - China Railway (4.19%) - Guodian Power (3.07%) - China Power Construction (3.03%) [2] Market Distribution - The CSI 300 Infrastructure Theme Index has a market distribution of 96.01% on the Shanghai Stock Exchange and 3.99% on the Shenzhen Stock Exchange [2] - The industry composition of the index includes: - Utilities: 42.59% - Industrials: 34.52% - Communication Services: 22.90% [2] Sample Adjustment - The index samples are adjusted semi-annually, with adjustments implemented on the next trading day following the second Friday of June and December each year [3] - Weight factors are adjusted in accordance with sample changes, typically remaining fixed until the next scheduled adjustment [3] - In the event of special circumstances affecting the CSI 300 Index samples, corresponding adjustments will be made to the index samples [3]