Alpha因子拥挤度高企的当下，指数增强基金是否依然有魅力？

Core Insights - The article discusses the concept of enhanced index funds, which aim to achieve excess returns (Alpha) while passively tracking an index, using various strategies such as multi-factor models and quantitative analysis [1][9] - Enhanced index ETFs have seen significant growth, with over 60 products available as of August 22, 2025, nearly half of which were established in the last two years [1][9] Performance Analysis - Traditional index-enhanced strategies have faced challenges, with some funds underperforming compared to fully replicated index ETFs, particularly in the past year [2][4] - For instance, the annual returns of several enhanced strategy ETFs, such as the Guotai Hushen 300 Enhanced Strategy ETF, were lower than those of standard ETFs [3][4] Market Dynamics - Large-cap stocks, like those in the Hushen 300 index, are often well-covered by institutions, leading to high pricing efficiency and making it difficult for quantitative strategies to identify mispricings [4] - Conversely, small-cap stocks, particularly those in indices like the CSI 2000, have shown higher Alpha potential due to less institutional coverage and greater pricing inefficiencies [5][6] Long-term Trends - Enhanced index strategies have demonstrated superior long-term performance, with the CSI 500 Enhanced Index outperforming its benchmark over three, five, and ten-year periods [7][8] - The article emphasizes that the probability of achieving excess returns with enhanced index funds is over 90%, making them an attractive option for both retail and professional investors [9]