Jin Rong Jie·2025-07-11 07:37Core Points - The Shanghai Composite Index opened high and fluctuated, with the CSI 300 Utilities (secondary industry) index reported at 2645.95 points [1] - The CSI 300 Utilities index has decreased by 0.31% over the past month, increased by 1.48% over the past three months, and has declined by 2.24% year-to-date [1] Industry Classification - The CSI 300 index is categorized into 11 primary industries, 35 secondary industries, over 90 tertiary industries, and more than 200 quaternary industries, providing a comprehensive analysis tool for investors [1] - The index is based on a sample of 300 stocks from the CSI 300 index, with a base date of December 31, 2004, and a base point of 1000.0 [1] Index Holdings - The top ten weights in the CSI 300 Utilities index are: - Changjiang Electric Power (48.55%) - China Nuclear Power (10.28%) - Three Gorges Energy (8.2%) - Guodian Power (5.62%) - State Power Investment Corporation (4.72%) - Sichuan Investment Energy (4.17%) - Huaneng International (4.15%) - China General Nuclear Power (3.86%) - Zhejiang Energy (2.77%) - Huadian International (2.72%) [1] Market Distribution - The market distribution of the CSI 300 Utilities index shows that the Shanghai Stock Exchange accounts for 95.80%, while the Shenzhen Stock Exchange accounts for 4.20% [2] - In terms of industry composition within the index, hydropower constitutes 59.70%, thermal power 15.26%, nuclear power 14.14%, wind power 8.54%, and gas power 2.36% [2] Sample Adjustment - The index samples are adjusted biannually, with adjustments implemented on the next trading day following the second Friday of June and December each year [2] - Weight factors are generally fixed until the next scheduled adjustment, with temporary adjustments made in response to changes in the CSI 300 index samples [2]