中银多因子选股系列（九）：如何追踪“国家队”构建股票优选组合？（改进版2.0）

Timing Analysis - The "National Team" funding intensity changes are negatively correlated with the CSI 800 index movements, indicating that the "National Team" tends to enter the market at low points and exit at high points[2] - Significant inflows from the "National Team" were observed in 2015-2016, 2018-2019, and 2023-2024, with inflows exceeding two standard deviations, corroborated by announcements[2] Factor Construction - Three factors were constructed to assess "National Team" stock selection: Factor 1 measures changes in holding market value, Factor 2 assesses potential price space, and Factor 3 evaluates current holding market value[154] - Factor 1 showed superior excess returns when using market value changes compared to share ratio changes, suggesting a preference for the former in strategy implementation[15] Performance Metrics - The strategy achieved an annualized excess return of 9.9% relative to the CSI 300 index, 10.8% relative to the CSI 500 index, and 10.4% relative to the CSI 800 index[62][63] - The model demonstrated stable excess returns across most years, with notable performance in 2015 (38.6% excess return for CSI 800) and 2023 (16.6% for CSI 800)[43] Sensitivity Testing - Sensitivity tests indicated that not normalizing for industry and market capitalization resulted in higher annualized excess returns, particularly for the CSI 300 (9.9% vs. 7.2% when normalized)[46] - The analysis confirmed that the "National Team" has a preference for specific industries and large-cap stocks, which should be retained in the factor construction[139]