数据统计显示，沪深300运输业指数近一个月下跌0.50%，近三个月上涨3.23%，年至今下跌1.05%。 资料显示，指数样本每半年调整一次，样本调整实施时间分别为每年6月和12月的第二个星期五的下一 交易日。权重因子随样本定期调整而调整，调整时间与指数样本定期调整实施时间相同。在下一个定期 调整日前，权重因子一般固定不变。遇临时调整时，当沪深300指数调整样本时，沪深300行业指数样本 随之进行相应调整。在样本公司有特殊事件发生，导致其行业归属发生变更时，将对沪深300行业指数 样本进行相应调整。当样本退市时，将其从指数样本中剔除。样本公司发生收购、合并、分拆等情形的 处理，参照计算与维护细则处理。 从沪深300运输业指数持仓的市场板块来看，上海证券交易所占比81.09%、深圳证券交易所占比 18.91%。 从沪深300运输业指数持仓样本的行业来看，铁路运输占比38.74%、快递占比21.72%、航运占比 20.16%、航空运输占比19.38%。 据了解，为反映沪深300指数样本中不同行业公司证券的整体表现，为投资者提供分析工具，将沪深300 指数300只样本按行业分类标准分为11个一级行业、35个二级行业、 ...

Core Viewpoint - The Shanghai Composite Index opened lower but rose throughout the day, with the CSI 300 Transportation Index reported at 3817.95 points, reflecting a recent decline of 1.38% over the past month, an increase of 3.61% over the past three months, and a year-to-date decline of 1.63% [1] Group 1: Index Composition and Performance - The CSI 300 Transportation Index is categorized into 11 primary industries, 35 secondary industries, over 90 tertiary industries, and more than 200 quaternary industries, providing a comprehensive analysis tool for investors [1] - The index is based on a sample of 300 stocks from the CSI 300 Index, with a base date of December 31, 2004, and a base point of 1000.0 [1] - The top ten weighted stocks in the CSI 300 Transportation Index include: - Beijing-Shanghai High-Speed Railway (26.28%) - SF Express (17.91%) - COSCO Shipping Holdings (14.98%) - Datong Railway (12.6%) - China Eastern Airlines (5.1%) - China Southern Airlines (4.83%) - Air China (4.4%) - Spring Airlines (4.26%) - YTO Express (3.41%) - China Merchants Energy Shipping (3.08%) [1] Group 2: Market Segmentation - The market composition of the CSI 300 Transportation Index shows that the Shanghai Stock Exchange accounts for 81.16%, while the Shenzhen Stock Exchange accounts for 18.84% [1] - The industry breakdown of the index's sample includes: - Railway Transportation (38.88%) - Express Delivery (21.33%) - Shipping (20.28%) - Air Transportation (19.51%) [2] Group 3: Sample Adjustment Mechanism - The index samples are adjusted biannually, with adjustments occurring on the next trading day following the second Friday of June and December each year [2] - Weight factors are adjusted in accordance with the sample changes, remaining fixed until the next scheduled adjustment unless a temporary adjustment is required due to changes in the CSI 300 Index [2] - Special events affecting sample companies, such as delisting, mergers, or changes in industry classification, will prompt corresponding adjustments to the CSI 300 industry index samples [2]