【金工】基本面驱动或为当前主要交易方向——金融工程市场跟踪周报20251222（祁嫣然/张威）

Market Overview - The A-share market experienced a rebound after an initial decline during the week of December 15-19, 2025, with major broad-based indices showing a decrease in trading volume compared to the previous week [4] - The net inflow of funds into stock ETFs was 55.353 billion yuan, with large-cap thematic ETFs being the primary focus for net inflows [4] - Following the Central Economic Work Conference in December, market trading sentiment improved, leading to a better funding environment that supports further market growth [4] - Short-term fundamental factors continued to outperform, indicating a transition from a funding-driven market to a fundamental-driven market, with a focus on "dividend + technology" as the main investment theme for the medium to long term [4] Index Performance - The performance of major indices varied, with the Shanghai Composite Index rising by 0.03%, the SSE 50 increasing by 0.32%, while the CSI 300 fell by 0.28%, the CSI 500 remained unchanged, the CSI 1000 decreased by 0.56%, and the ChiNext Index dropped by 2.26% [4] - As of December 19, 2025, the valuation percentiles for the CSI 300, CSI 500, CSI 1000, and ChiNext Index were categorized as "moderate," while the Shanghai Composite Index and SSE 50 were classified as "dangerous" [4] Volatility Analysis - The cross-sectional volatility of the CSI 300 index constituents decreased compared to the previous week, indicating a deterioration in the short-term Alpha environment, while the cross-sectional volatility for the CSI 500 and CSI 1000 constituents increased, suggesting an improvement in the short-term Alpha environment [5] - Time series volatility for the CSI 300, CSI 500, and CSI 1000 constituents increased compared to the previous week, indicating a better Alpha environment [5] Fund Flow Tracking - The top five stocks attracting the most institutional attention last week were Changan Automobile (214 institutions), Yipinhong (119), Boying Welding (115), Huatong Cable (101), and Zuoli Pharmaceutical (95) [6] - During the week of December 15-19, 2025, the net inflow of southbound funds through the Hong Kong Stock Connect was 16.274 billion HKD, with the Shanghai Stock Connect experiencing a net outflow of 420 million HKD and the Shenzhen Stock Connect seeing a net inflow of 16.694 billion HKD [6] - The median return for stock ETFs was -0.25% with a net inflow of 55.353 billion yuan, while cross-border ETFs had a median return of -0.86% with a net inflow of 0.902 billion yuan [6]