Group 1 - The core viewpoint of the news is the performance of the China Securities Hong Kong 300 Energy Index, which has shown significant growth over various time frames, indicating a positive trend in the energy sector [1][3] - The China Securities Hong Kong 300 Energy Index has increased by 7.72% in the past month, 16.91% in the past three months, and 5.04% year-to-date [1] - The index is composed entirely of securities listed on the Hong Kong Stock Exchange, with a base date of December 31, 2004, set at 1000.0 points [1] Group 2 - The composition of the China Securities Hong Kong 300 Energy Index includes 41.24% in fuel refining, 32.35% in integrated oil and gas companies, 24.10% in coal, 1.57% in oilfield services, and 0.74% in coke [1] - The index samples are adjusted biannually, with changes implemented on the next trading day following the second Friday of June and December [2] - Adjustments to the index samples occur in response to special events affecting sample companies, such as mergers or changes in industry classification [2]

Core Viewpoint - The China Securities Index Hong Kong 300 Energy Index has shown significant growth, with a 11.96% increase over the past month, 19.68% over the past three months, and a 6.93% increase year-to-date [1] Group 1: Index Performance - The China Securities Index Hong Kong 300 Energy Index is currently at 2656.17 points [1] - The index is designed to reflect the overall performance of different industries in the Hong Kong market, based on the China Securities Industry Classification Standards [1] Group 2: Index Composition - The index is composed entirely of securities listed on the Hong Kong Stock Exchange, with a 100% allocation [1] - The sector breakdown of the index includes: - Oil refining: 41.59% - Integrated oil and gas companies: 33.45% - Coal: 22.70% - Oilfield services: 1.55% - Coking: 0.72% [1] Group 3: Sample Adjustment - The index samples are adjusted biannually, specifically on the next trading day after the second Friday of June and December [2] - Weight factors are generally fixed until the next scheduled adjustment, with temporary adjustments made in response to significant events affecting sample companies [2]

Group 1 - The core viewpoint of the articles highlights the performance of the China Securities Hong Kong 300 Energy Index, which has seen a decline of 7.31% in the past month, 8.77% in the past three months, and 10.93% year-to-date [1] - The top ten holdings of the China Securities Hong Kong 300 Energy Index include China National Offshore Oil (41.44%), PetroChina (17.49%), China Shenhua Energy (13.95%), Sinopec (13.62%), and others, indicating a concentration in a few major companies [1] - The index is designed to reflect the overall performance of different industries in the Hong Kong market, with a base date of December 31, 2004, set at 1000.0 points [1] Group 2 - The market segments represented in the China Securities Hong Kong 300 Energy Index are entirely from the Hong Kong Stock Exchange, with fuel refining accounting for 42.01%, integrated oil and gas companies for 31.12%, and coal for 24.17% [2] - The index samples are adjusted biannually, with changes implemented on the next trading day following the second Friday of June and December, ensuring that the weight factors are updated accordingly [2] - Adjustments to the index samples occur in response to special events affecting the companies, such as mergers or delistings, ensuring the index remains reflective of the current market landscape [2]