A股重要指数修订，今日实施

Core Viewpoint - The article discusses the significant adjustments made to the ChiNext Composite Index, which aims to enhance the quality of sample stocks and attract long-term investment by implementing risk warning and ESG negative exclusion mechanisms [1][3]. Group 1: Index Adjustments - The ChiNext Composite Index has introduced a monthly exclusion mechanism for stocks under risk warning (ST or *ST), enhancing tail risk management and stability of the index [3]. - An ESG negative exclusion mechanism has been implemented, promoting responsible investment and directing funds towards companies with strong governance and sustainability [3]. Group 2: Sample Stock Overview - Post-revision, the ChiNext Composite Index includes 1,316 sample stocks, covering 95% of ChiNext listed companies, with a total market capitalization coverage of 98% [3]. - The index encompasses high-tech industries such as semiconductors, artificial intelligence, innovative pharmaceuticals, medical devices, photovoltaics, and lithium batteries, with significant weight in industrial (32%), information technology (26%), and healthcare (12%) sectors [3]. Group 3: Long-term Performance - Since its launch in August 2010, the ChiNext Composite Index has shown a cumulative increase of 197% and an annualized return of 7.6%, indicating strong long-term performance [5]. - The sample stocks within the index are characterized by robust fundamentals, with projected five-year compound annual growth rates of 13% for revenue and 8% for net profit by the end of 2024 [5].