Core Points - The China Securities 1000 Energy Index has experienced a decline of 8.54% over the past month, 8.15% over the past three months, and 11.55% year-to-date [2] Group 1: Index Performance - The China Securities 1000 Energy Index is currently reported at 436.46 points [1] - The index is based on a sample of liquid and representative securities from each industry, providing a diversified investment option [2] - The index was established on December 31, 2004, with a base point of 1000.0 [2] Group 2: Index Holdings - The top ten weighted stocks in the China Securities 1000 Energy Index include Donghua Energy (10.57%), New Natural Gas (9.55%), and Continental Oil & Gas (9.04%) [2] - The Shanghai Stock Exchange accounts for 71.66% of the index holdings, while the Shenzhen Stock Exchange accounts for 28.34% [2] - The industry composition of the index holdings includes coal (32.49%), oil refining (22.69%), coke (20.60%), natural gas processing (13.65%), and oil and gas circulation and others (10.57%) [2] Group 3: Sample Adjustment - The index samples are adjusted biannually, with adjustments occurring on the next trading day after the second Friday of June and December [3] - Temporary adjustments may occur under special circumstances, such as delisting or corporate actions like mergers and acquisitions [3] - Changes in industry classification due to special events will also lead to corresponding adjustments in the index samples [3]