Sou Hu Cai Jing·2025-05-15 08:00Core Viewpoint - The China Oil and Gas Industry Index has shown a decline in recent trading sessions, reflecting broader market trends and specific sector performance [1][2]. Group 1: Index Performance - The China Oil and Gas Industry Index (H30198) opened lower and fell by 1.04%, closing at 1751.37 points with a trading volume of 13.948 billion yuan [1]. - Over the past month, the index has increased by 4.60%, but it has decreased by 1.07% over the last three months and is down 4.38% year-to-date [1]. Group 2: Index Composition - The index includes companies involved in oil and gas exploration, equipment manufacturing, transportation, sales, refining, and primary petrochemical production [1]. - The top ten weighted companies in the index are: China National Petroleum (10.46%), China National Offshore Oil (9.96%), Sinopec (9.54%), Guanghui Energy (5.02%), and others [1]. - The index is primarily composed of companies listed on the Shanghai Stock Exchange (70.91%) and the Shenzhen Stock Exchange (29.09%) [1]. Group 3: Sector Allocation - The sector allocation of the index shows that energy constitutes 61.44%, materials 20.57%, industrials 15.14%, finance 1.77%, and utilities 1.08% [2]. - The index samples are adjusted biannually, with changes implemented on the next trading day following the second Friday of June and December [2].