Sou Hu Cai Jing·2025-05-08 07:59Core Viewpoint - The China Oil and Gas Industry Index has shown mixed performance, with a recent decline despite a monthly increase, reflecting the overall volatility in the oil and gas sector [2]. Group 1: Index Performance - The China Oil and Gas Industry Index decreased by 0.45% to 1729.45 points, with a trading volume of 12.33 billion yuan [1]. - Over the past month, the index has risen by 6.44%, but it has declined by 3.48% over the last three months and 6.14% year-to-date [2]. Group 2: Index Composition - The index includes companies involved in oil and gas exploration, equipment manufacturing, transportation, sales, refining, and primary petrochemical production [2]. - The top ten weighted companies in the index are: China National Petroleum (10.36%), China National Offshore Oil (9.87%), Sinopec (9.52%), Guanghui Energy (5.05%), China Merchants Energy (3.8%), Jereh Group (3.71%), Hengli Petrochemical (3.25%), Satellite Chemical (3.13%), Dongfang Shenghong (2.8%), and COSCO Shipping Energy (2.8%) [2]. Group 3: Market and Sector Breakdown - The Shanghai Stock Exchange accounts for 70.98% of the index's holdings, while the Shenzhen Stock Exchange accounts for 29.02% [2]. - The sector breakdown of the index holdings is as follows: Energy (61.45%), Materials (20.71%), Industrials (15.00%), Financials (1.78%), and Utilities (1.06%) [2]. Group 4: Index Adjustment and Management - The index samples are adjusted semi-annually, with adjustments occurring on the next trading day after the second Friday of June and December [3]. - In special circumstances, the index may undergo temporary adjustments, such as removing samples that are delisted or handling mergers and acquisitions according to maintenance guidelines [3].