Jereh Group(SZ:002353) Jin Rong Jie·2025-07-31 09:18Group 1 - The core viewpoint of the news is the performance of the CSI All Share Oil and Gas Extraction and Oilfield Services Index, which has shown significant growth over the past month, three months, and year-to-date [1][2] - The CSI All Share Oil and Gas Extraction and Oilfield Services Index has increased by 5.42% in the last month, 16.76% in the last three months, and 9.67% year-to-date [1] - The index is composed of various industry classifications, including 11 primary industries, 35 secondary industries, over 90 tertiary industries, and more than 200 quaternary industries [1] Group 2 - The top ten weighted companies in the index include: Jereh Group (15.74%), CNOOC Engineering (13.4%), China Oilfield Services (9.03%), CNOOC Development (8.98%), Sinopec Oilfield Service (8.91%), China National Petroleum Engineering (6.34%), Dwell (4.03%), Tongyuan Petroleum (3.66%), Renzhi Co. (3.65%), and Sinopec Machinery (3.65%) [1] - The market share of the index holdings is 56.11% from the Shanghai Stock Exchange, 43.25% from the Shenzhen Stock Exchange, and 0.64% from the Beijing Stock Exchange [2] - The index sample is adjusted every six months, with adjustments occurring on the next trading day after the second Friday of June and December [2]