主动基金经理集体“出轨”？这个指标帮你精准避雷

Core Viewpoint - The article discusses the transformation in China's public fund industry regarding the recognition and application of performance benchmarks, emphasizing the importance of the "Active Share" metric to help investors identify differences in investment strategies and avoid pitfalls associated with "pseudo-active" funds [2][8]. Group 1: Introduction and Regulatory Changes - The article highlights the issue of fund managers in China neglecting performance benchmarks, leading to significant deviations in fund holdings and resulting in poor investor experiences [1]. - The China Securities Regulatory Commission (CSRC) issued an action plan on May 7, 2023, aimed at enhancing the quality of public funds, which emphasizes the central role of benchmarks in defining product positioning, investment strategies, and performance evaluation [1]. Group 2: Active Share Metric - Active Share is defined as a quantitative measure of the difference between a fund's portfolio and its benchmark, calculated by summing the absolute differences in weights of individual securities [4][5]. - The metric allows for a clearer distinction between active management and passive replication, addressing limitations of traditional metrics like R-squared and tracking error [6][7]. Group 3: Current State of Active Equity Funds - As of June 30, 2025, the average Active Share for three categories of active equity funds in China is 89.82%, with 87% of funds having an Active Share above 80% [10][14]. - The article notes that active fund managers often deviate from benchmarks in terms of style, industry, and individual stock selection, leading to high Active Share levels [13]. Group 4: Category Analysis - The average Active Share for large-cap growth, large-cap balanced, and small-cap funds is reported as 89.86%, 86.29%, and 96.26%, respectively, indicating that small-cap funds exhibit significantly higher Active Share [14]. - The article explains that the concentration of large-cap stocks in indices limits the active management opportunities, while small-cap stocks provide a broader range of potential excess returns [14]. Group 5: Case Studies - The article compares two funds within the same category, highlighting significant differences in their Active Share due to varying investment strategies, with one fund maintaining a stable Active Share around 70% and the other nearing 100% [17]. - The contrasting strategies illustrate how fund managers' approaches to portfolio construction can lead to different levels of risk and performance volatility [17]. Group 6: Future Insights - The next article will delve into the relationship between Active Share and fund performance, as well as how to identify strategy drift and "pseudo-active" funds in light of new regulations [23].