A股，重要指数调整！

Core Viewpoint - The recent adjustment of the STAR Market indices, particularly the STAR 50 Index, enhances the representation of the STAR Market and reflects the stability of the market's securities structure [1][2][4]. Group 1: Index Adjustments - On August 29, the Shanghai Stock Exchange and China Securities Index Company announced adjustments to the STAR 50 and STAR 100 indices, effective after market close on September 12, 2025 [2]. - The inclusion of Shengyi Electronics in the STAR 50 Index and five other securities in the STAR 100 Index signifies a shift in the sample composition [4]. - Post-adjustment, the total market capitalization of the STAR 50 Index is 3.1 trillion yuan, with a coverage rate of 38.9%, while the STAR 100 Index has a total market capitalization of 1.9 trillion yuan and a coverage rate of 24.4% [4]. Group 2: Market Performance - The STAR 50, STAR 100, and STAR 200 indices collectively cover 84.6% of the market capitalization, an increase of 0.5% from before the adjustments, indicating a robust representation of large, medium, and small-cap securities [4]. - The top five weighted stocks in the STAR 50 Index account for 39.1% of its total weight, while the STAR 100 Index's top five weighted stocks account for 13.9% [4]. - The STAR Market indices have seen significant growth this year, with the STAR Composite Index, STAR 50, STAR 100, and STAR 200 rising by 43.30%, 35.63%, 46.83%, and 54.90% respectively, reaching new highs since the "9.24" event last year [4]. Group 3: Index Development - Since the release of the "Eight Policies" in June last year, the STAR Market indices have expanded, with 16 new indices launched, bringing the total to 32, thus providing a comprehensive index system for investors [5]. - The total scale of STAR index products has surpassed 320 billion yuan, with the flagship STAR 50 product exceeding 190 billion yuan, making it the fifth largest broad-based index product in the domestic market [5]. - The implementation of the "1+6" policy measures is expected to further enhance index-based investment, supporting high-level technological independence and the development of new productive forces [5].