投资进化论丨指数基金怎样配置才科学？牢记5个“不同”

Core Viewpoint - In 2025, domestic ETFs in China continued to show strong growth, surpassing 6 trillion yuan, making it the largest ETF market in Asia. Investors increasingly utilize index funds as a core positioning tool for asset allocation, emphasizing the importance of effective diversification through various dimensions [1]. Group 1: Different Constituents - Investors often mistakenly believe that purchasing different index funds equates to achieving diversification. High overlap in constituents can lead to "pseudo-diversification." For example, holding both the CSI 300 and the CSI 800 does not effectively reduce risk due to their overlapping stocks [2]. - In contrast, the CSI 1000, which consists of stocks not included in the CSI 800, provides true diversification when held alongside the CSI 800, allowing for effective risk management [2]. Group 2: Different Styles - Stocks can be categorized by market capitalization into large-cap, mid-cap, small-cap, and micro-cap styles. Historical data shows that there are style rotations between large-cap and small-cap stocks in the A-share market, influenced by macroeconomic factors [3][5]. - A strategy combining both large-cap and small-cap stocks can be beneficial, leveraging their performance differences in varying macro environments [5]. Group 3: Different Industries and Strategies - The A-share market features a variety of industry and strategy indices, allowing investors to capture growth opportunities in specific sectors. Investors can adopt a "core-satellite" strategy, using mainstream broad-based indices as core holdings while selecting industry or strategy indices for potential excess returns [6]. Group 4: Different Investment Markets - The performance of markets in different countries and regions can vary significantly. Investing in low-correlation markets can enhance diversification and capture growth opportunities. QDII index funds facilitate global investment for ordinary investors, with significant indices linked to U.S. and Hong Kong markets [8]. Group 5: Different Asset Classes - Different asset classes can exhibit interactive relationships, such as bonds strengthening during stock market corrections. Combining negatively correlated assets (e.g., stocks and bonds) or low-correlation assets (e.g., stocks and commodities) can reduce overall portfolio volatility [9][10]. Conclusion - Utilizing index tools for asset allocation requires a comprehensive approach. Investors are encouraged to consider constituents, styles, industry strategies, investment markets, and asset classes to optimize their investment portfolios scientifically [11].