中证国新央企小盘指数下跌0.25%，前十大权重包含航天彩虹等

Group 1 - The core index, the China Securities National New State-Owned Enterprises Small Cap Index, experienced a decline of 0.25%, closing at 1206.08 points with a trading volume of 84.603 billion yuan [1] - Over the past month, the index has increased by 10.39%, by 19.83% over the last three months, and by 21.43% year-to-date [1] - The index consists of 200 smaller listed companies selected from state-owned enterprises under the State-owned Assets Supervision and Administration Commission, reflecting the overall performance of small-cap state-owned enterprises [1] Group 2 - The top ten weighted stocks in the index include Inner Mongolia First Machinery (2.14%), Great Wall Military Industry (2.14%), Aerospace Rainbow (1.75%), and others, with the total weight of these stocks indicating a concentrated investment in a few key players [1] - The market distribution of the index holdings shows that the Shanghai Stock Exchange accounts for 50.47% and the Shenzhen Stock Exchange accounts for 49.53% [1] - The industry composition of the index holdings is as follows: Industrial sector 38.84%, Materials 17.59%, Information Technology 13.36%, Consumer Discretionary 9.34%, Utilities 5.58%, Healthcare 5.10%, Communication Services 4.47%, Consumer Staples 3.49%, Energy 1.70%, and Real Estate 0.53% [2] Group 3 - The index samples are adjusted semi-annually, with adjustments implemented on the next trading day following the second Friday of June and December each year [2] - Weight factors are generally fixed until the next scheduled adjustment, with special circumstances allowing for temporary adjustments [2] - Companies that are delisted or undergo mergers, acquisitions, or splits are handled according to the calculation and maintenance guidelines [2]