量化选股策略周报：本周指增组合表现回暖

Market Performance - As of January 23, 2026, the Shanghai Composite Index rose by 0.84%, while the Shenzhen Component Index increased by 1.11%[11] - The CSI 300 Index decreased by 0.62%, with notable performance from small-cap indices[11] - Year-to-date, the CSI 300 Index is up 1.6%, while the CSI 300 enhanced portfolio has increased by 1.8%, yielding an excess return of 0.2%[23] Enhanced Fund Performance - For the CSI 300 enhanced fund, the minimum excess return was -0.48%, the median was 0.42%, and the maximum was 2.47% for the week[15] - The CSI 500 enhanced fund had a minimum excess return of -1.42%, a median of -0.12%, and a maximum of 1.56%[15] - The CSI 1000 enhanced fund reported a minimum excess return of -0.15%, a median of 0.72%, and a maximum of 3.15%[15] Sector Performance - The construction materials, petroleum and petrochemicals, and steel sectors performed well this week, with weekly returns of 9.23%, 7.71%, and 7.31% respectively[12] - Conversely, the banking, telecommunications, and non-bank financial sectors underperformed, with weekly returns of -2.70%, -2.12%, and -1.45% respectively[12] Risk Considerations - There are risks associated with factor failure, model failure, and market style changes that could impact the effectiveness of the investment strategies employed[6][45]