2024-2003年上市公司企业机构投资者团体持股比例数据

Core Insights - The report provides data on the shareholding ratios of institutional investors in publicly listed companies from 2024 to 2003, focusing on the collective ownership and network connections among these investors [1]. Group 1: Methodology - The methodology involves creating a network of institutional investors based on their shared ownership of companies, where a connection is established if two investors hold at least 5% of the same company's shares [1]. - The analysis constructs an adjacency matrix to identify investor groups and calculates the shareholding ratios of these groups using specific formulas [1]. - Three final indicators are derived: CliqueOwnership, CliqueHerfindahl, and CliqueOwnTop1, all expressed as percentages [1]. Group 2: Data Overview - The dataset includes 68,000 samples and over 5,700 companies, providing original data, calculation codes, and final results for verification [1]. - The reference for the methodology is a study by Wu Xiaohui and others, which discusses the relationship between institutional investor clustering and stock price crash risk [1]. Group 3: Results Summary - The table presents the CliqueOwnership and CliqueHerfindahl percentages for various securities in 2024, indicating the level of institutional ownership concentration [2]. - For example, security code 000001 has a CliqueOwnership of 2.6491% and a CliqueHerfindahl of 4.0309%, suggesting a moderate level of institutional investor concentration [2]. - Other securities show varying levels of ownership concentration, with some like 001213 having a higher CliqueHerfindahl of 9.4287%, indicating a more concentrated ownership structure [2].