抓主升靠趋势，看行为比持仓

Core Viewpoint - The article emphasizes the importance of focusing on institutional trading activity rather than merely holding positions, as this can lead to better investment decisions and opportunities [1]. Group 1: Institutional Trading Activity - Many investors mistakenly believe that high institutional holdings indicate a bullish signal, but this is often not the case. For instance, a stock that saw a 2% increase in institutional holdings in Q2 2025 experienced a decline of over 20% in July and August, while the broader market rose by 10% [3]. - The key issue is that over 80% of stocks have institutional funds, but having funds does not equate to active trading. Only sustained institutional trading can absorb selling pressure and drive prices up [3][6]. - Quantitative data reveals that a stock's "institutional inventory" remained low in July, indicating insufficient institutional trading activity, which contributed to its price decline [6]. Group 2: Importance of "Institutional Inventory" - "Institutional inventory" serves as a crucial indicator of trading activity, helping investors avoid the misconception that high holdings equate to strong market performance. A stock that rose 30% in Q2 2025 and an additional 40% in July and August maintained active institutional inventory, reflecting ongoing trading participation [6][7]. - Conversely, a stock that was heavily accumulated by funds in Q2 2025 only saw a 20% increase in July and August due to a decline in institutional trading activity [7]. Group 3: Trading Behavior vs. Holdings - There are instances where a stock with significant institutional selling in Q2 2025 still experienced price increases, suggesting that trading behavior, rather than holdings, is the primary driver of market performance [10]. - The active "institutional inventory" data indicates that the trading behavior involved a rotation of new and old institutional investors rather than a true withdrawal of funds [12]. Group 4: Utilizing Quantitative Data - Many investors struggle to achieve satisfactory returns during bullish markets due to outdated beliefs, such as holding onto stocks in a bull market without considering current institutional trading dynamics. The presence of widespread institutional funds means that only stocks with active trading have a better chance of performing well [13]. - The value of quantitative data lies in its ability to replace subjective speculation with objective insights, allowing investors to understand the true trading behavior behind stocks and avoid wasting time on ineffective positions [13].