“别把所有鸡蛋放一个篮子"的投资智慧，现在还行得通吗？

Core Viewpoint - The article discusses the impact of geopolitical risks and market volatility on investment strategies, emphasizing the importance of diversification in investment portfolios to mitigate risks in a changing environment [2][3]. Group 1: Diversification Concept - Diversification is described as the only "free lunch" in investing, where the overall risk of a portfolio is not merely the sum of individual asset risks but is influenced by the interactions between assets [3][5]. - The correlation coefficient is a key metric for understanding the relationship between asset price movements, with values ranging from 1 (perfectly correlated) to -1 (perfectly inversely correlated) [4][5]. - Combining assets with correlation coefficients below 1 can reduce overall risk, and lower correlation enhances the effectiveness of diversification [5][8]. Group 2: Historical Context and Changing Correlations - Historical data shows that correlations between A-shares and global markets fluctuate, indicating that past effective diversification strategies may not hold in the future [9][10]. - Since 2021, the correlation between A-shares and developed markets like the US and Japan has decreased, enhancing the diversification value for A-share investors [13]. - Conversely, correlations with emerging markets have increased since 2017, partly due to China's growing weight in emerging market indices [13][14]. Group 3: Building a "Anti-Fragile" Portfolio - The article suggests that merely investing in overseas assets is insufficient for effective risk diversification; a more comprehensive approach is needed that spans multiple asset classes [19][20]. - The changing correlation dynamics among major asset classes highlight the complexity and challenges of constructing a diversified investment portfolio [21][22]. - Continuous monitoring of asset correlations and dynamic adjustments to the portfolio are essential for effective management in a complex investment environment [23].