Core Viewpoint - The Shanghai Stock Exchange and China Securities Index Company announced an optimization plan for the Shanghai 380 Index and the launch of the Shanghai 580 Index to enhance the representation of small and mid-cap companies in the market [1][3]. Group 1: Index Optimization - The Shanghai 380 Index has been in place for over a decade, and its optimization is necessary due to limitations in representation, rule uniformity, and sample stability [3]. - The number of listed companies in the Shanghai market with a market capitalization below 10 billion yuan accounts for over 60%, indicating a need for indices that better represent small-cap companies [3]. - The revised Shanghai 380 Index will have a sample market capitalization coverage of 14.7%, an increase of approximately 1 percentage point from before the optimization [4]. Group 2: New Index Launch - The Shanghai 580 Index is designed to represent small-cap companies, with approximately 30%, 40%, 50%, and 60% of its sample weight coming from sectors such as the Science and Technology Innovation Board, specialized and innovative enterprises, private economy, and emerging industries [4]. - The new index system will consist of the Shanghai 50, Shanghai 180, Shanghai 380, and Shanghai 580 indices, covering a total of 1,140 stocks, which represents a coverage rate of 50% in terms of the number of securities and nearly 90% in terms of market capitalization [4]. Group 3: Future Developments - The Shanghai Stock Exchange aims to continue enriching the index system, establishing a "flagship broad-based + science and technology + dividend" index brand to facilitate long-term capital inflows [6]. - The flagship broad-based series includes the Shanghai 50, 180, 380, and 580 indices, providing essential tools for investors to participate in A-share investments [6]. - Future efforts will focus on promoting a rational, value-oriented, and long-term investment ecosystem through diversified index investment options [6].