Jin Rong Jie·2025-06-25 07:51Group 1 - The Shanghai Composite Index opened lower but rose throughout the day, with the CSI 300 Utilities (secondary industry) index reported at 2669.83 points [1] - The CSI 300 Utilities index has decreased by 1.10% over the past month, increased by 5.80% over the past three months, and has declined by 1.36% 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, providing a comprehensive analysis tool for investors [1] Group 2 - The top ten holdings in the CSI 300 Utilities index are: Changjiang Electric (49.31%), China Nuclear Power (10.16%), Three Gorges Energy (8.03%), Guodian Power (5.52%), State Power Investment (4.65%), Huaneng International (4.17%), Chuanwei Energy (4.09%), China General Nuclear Power (3.81%), Zhejiang Energy (2.82%), and Huadian International (2.5%) [1] - The market share of the CSI 300 Utilities index is dominated by the Shanghai Stock Exchange at 95.87%, while the Shenzhen Stock Exchange accounts for 4.13% [2] - In terms of industry composition, hydropower constitutes 60.36%, thermal power 15.01%, nuclear power 13.97%, wind power 8.36%, and gas power 2.31% of the index [2] Group 3 - 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 adjusted in accordance with the regular sample adjustments, which occur at the same time as the index sample adjustments [2] - Temporary adjustments to the index samples occur when the CSI 300 index undergoes changes, and special events affecting sample companies may also lead to corresponding adjustments in the CSI 300 industry index [2]