
Group 1 - The A-share market's three major indices closed mixed, with the CSI 300 Power Index at 2638.31 points [1] - The CSI 300 Power Index has decreased by 0.46% over the past month, 4.42% over the past three months, and 4.39% year-to-date [1] - The CSI 300 Index categorizes its 300 sample companies into 11 primary industries, 35 secondary industries, over 90 tertiary industries, and more than 200 quaternary industries [1] Group 2 - The top ten weights in the CSI 300 Power Index are: Changjiang Power (48.33%), China Nuclear Power (10.63%), Three Gorges Energy (8.61%), Guodian Power (5.99%), State Power Investment (4.98%), Huaneng International (4.57%), Chuanwei Energy (4.24%), China General Nuclear Power (4.19%), Zhejiang Energy (2.94%), and Huadian International (2.81%) [1] - The market share of the CSI 300 Power Index is 95.46% from the Shanghai Stock Exchange and 4.54% from the Shenzhen Stock Exchange [1] Group 3 - In terms of industry composition within the CSI 300 Power Index, hydropower accounts for 59.91%, thermal power for 16.31%, nuclear power for 14.82%, and wind power for 8.97% [2] - The index sample is adjusted biannually, with adjustments occurring 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 temporary adjustments made when the CSI 300 Index samples are modified [2]