Jin Rong Jie·2025-04-18 08:06Core Points - The A-share market's three major indices closed mixed, with the CSI 300 Utilities (secondary industry) index reported at 2626.36 points [1] - The CSI 300 Utilities index has increased by 4.97% over the past month, 2.36% over the past three months, and has decreased by 2.97% year-to-date [1] Industry Composition - The CSI 300 Utilities index is composed of various sectors categorized into 11 primary industries, 35 secondary industries, over 90 tertiary industries, and more than 200 quaternary industries [1] - The top ten weights in the CSI 300 Utilities index are as follows: - Changjiang Electric Power (47.88%) - China Nuclear Power (10.42%) - Three Gorges Energy (8.28%) - Guodian Power (5.57%) - State Power Investment (4.77%) - Chuanwei Energy (4.39%) - Huaneng International (4.24%) - China General Nuclear Power (3.82%) - Zhejiang Energy (3.07%) - Huadian International (2.58%) [1] Market Distribution - The market distribution of the CSI 300 Utilities index shows that the Shanghai Stock Exchange accounts for 95.85%, while the Shenzhen Stock Exchange accounts for 4.15% [2] - In terms of industry composition within the index, hydropower constitutes 59.29%, thermal power 15.45%, nuclear power 14.23%, wind power 8.62%, and gas power 2.40% [2] Index Adjustment Mechanism - 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, but can be modified in the event of temporary adjustments due to changes in the CSI 300 index samples or special events affecting sample companies [2]