主动量化周报：主线切换：涨价逻辑首选化工-20251116

• The report discusses the microstructure rebalancing in the A-share market, highlighting the increased concentration of stock price movements driven by speculative capital inflows since June 2025, which has impacted quantitative products' portfolio construction and risk exposure adjustments[13][23][24] - Quantitative products have adjusted their exposure to micro-cap stocks, initially reducing their holdings to mitigate nonlinear market cap risks, and later increasing allocations to amplify excess returns as speculative capital inflows weakened post-October 2025[13][23][24] - The report emphasizes the Barra style factor performance, noting that fundamental factors such as BP value and investment quality have shown positive returns, while transaction-related factors like short-term momentum have also delivered strong excess returns during the market's recent fluctuations[23][24][25]