Jin Rong Jie·2025-04-28 07:30Group 1 - The Shanghai Composite Index opened lower and the CSI 300 Chemical Index reported 2080.97 points, with a decline of 8.46% in the past month, 4.44% in the past three months, and 6.01% year-to-date [1] - The CSI 300 Index is categorized into 11 primary industries, 35 secondary industries, over 90 tertiary industries, and more than 200 quaternary industries, with a base date of December 31, 2004, and a base point of 1000.0 [1] - The top ten weights in the CSI 300 Chemical Index are: Wanhua Chemical (23.25%), Salt Lake Industry (13.52%), Baofeng Energy (7.58%), Juhua Co. (7.48%), Hengli Petrochemical (7.2%), Satellite Chemical (7.1%), Hualu Hengsheng (6.86%), Zangge Mining (6.26%), Longbai Group (6.04%), and Rongsheng Petrochemical (5.49%) [1] Group 2 - In terms of industry composition within the CSI 300 Chemical Index, other chemical raw materials account for 39.27%, polyurethane for 23.25%, potassium fertilizer for 19.79%, fluorochemical for 7.48%, titanium dioxide for 6.04%, and organic silicon for 4.17% [2] - The index sample is adjusted every six months, 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 when the CSI 300 Index sample is modified [2]