证券时报·2025-08-08 13:33Core Viewpoint - The adjustment of the CSI 1000 Index sample stocks is effective after the market closes on August 8, 2025, with three stocks being added and three ST stocks being removed [1][3][4]. Group 1: Index Adjustment Details - Three stocks, Wanhe Electric, Tefa Service, and Electric Wind Power, have been added to the CSI 1000 Index, while three ST stocks, ST Weiming, ST Emergency, and ST Nuotai, have been removed [4]. - The newly added stocks have shown strong performance recently, with Wanhe Electric rising by 7.44% on August 8 and a cumulative increase of 17.56% from August 6 to August 8; Electric Wind Power increased by 2.61% on August 8 and 19.23% cumulatively during the same period [4]. - Tefa Service, however, experienced a decline of 2.10% on August 8 and a slight decrease of 1.15% cumulatively from August 6 to August 8 [4]. Group 2: Index Performance - The CSI 1000 Index has performed well overall, with a cumulative increase of 14.78% year-to-date, outperforming the Shanghai Composite Index, Shenzhen Component Index, and ChiNext Index [7]. - Since the third quarter of 2025, the CSI 1000 Index has seen a cumulative increase of 7.58%, indicating an acceleration in growth compared to the first and second quarters [7]. - On August 7, 2025, the index reached a high of 6876.50 points, marking the highest level since April 21, 2023 [7]. Group 3: Stock Performance - Over 80% of the 1000 sample stocks in the CSI 1000 Index have risen since the third quarter of 2025, with nearly 20 stocks achieving a cumulative increase of over 50% [8]. - Year-to-date, approximately 746 stocks have increased, representing about three-quarters of the sample, with 120 stocks showing gains exceeding 50% [8]. - Notable stocks with over 100% cumulative gains this year include Changcheng Military Industry, Yipinhong, and others [8].