国泰海通证券研究·2025-08-15 10:15Group 1 - The core viewpoint of the article is that the correlation between Hong Kong stocks and A-shares is rapidly increasing, while the correlation with U.S. stocks has weakened since 2020, indicating a shift in the investment environment for Hong Kong stocks [1][2][3] Group 2 - Since 2020, the contribution of valuation to the fluctuations in Hong Kong stocks has increased, coinciding with the enhanced correlation with A-shares [2] - The liquidity of Hong Kong stocks has become less dependent on overseas factors due to geopolitical influences and changes in the attractiveness of Hong Kong stocks, leading to a decrease in foreign capital's share [2] - The fundamental performance of Hong Kong stocks is increasingly correlated with the mainland, as over two-thirds of listed companies in Hong Kong are Chinese enterprises, contributing 90% of the net profits [3]