读研报 | 股指创年内新高的路上，谁在买入？

Core Viewpoint - The A-share market has shown significant growth in the first half of 2025, with major indices achieving new highs despite international uncertainties, indicating stronger-than-expected market momentum and increased inflow of real capital [2][9]. Group 1: Sources of Incremental Capital - Public funds have emerged as a key source of incremental capital, with an increase of 194.8 billion yuan in the first five months of 2025, primarily driven by ETF and index funds [2]. - The issuance of actively managed funds has improved recently, with the issuance volume of three types of active equity funds rising from 3.97 billion yuan at the beginning of the year to 28.78 billion yuan in the past month [3]. Group 2: Retail Investor Dynamics - Retail investors are considered a significant force due to their sensitivity to market trends, with net inflows of retail funds remaining high during the first quarter, reaching 618.3 billion yuan, 630.7 billion yuan, and 497.0 billion yuan in February, March, and April respectively [7]. - The number of retail accounts is also at a historically high level, suggesting that personal funds could continue to be a source of market growth as upward expectations develop [7]. Group 3: Institutional Investor Behavior - In contrast, institutional funds such as private equity and northbound capital have shown conservative adjustments in a relatively uncertain market environment, indicating limited short-term changes [9]. - Insurance funds have reached a historical high in stock holdings, totaling 2.8 trillion yuan, but their equity investment ratio is unlikely to increase significantly without supportive long-term policies [9]. Group 4: Market Feedback Mechanism - The positive feedback mechanism of incremental capital can significantly influence market trends and the evolution of market styles, helping to explain the sectoral differentiation observed in the first half of the year [9].