主动量化组合跟踪：近期量化指增策略的回调复盘与归因分析

• The recent phenomenon of "strong index, weak quantitative Alpha" is attributed to style mismatches, with cumulative excess returns driven by small-cap and short-term momentum factors initially, and later by analyst consensus expectations and growth styles[2][3] - The Guozheng 2000 Index enhancement strategy involves factor testing and selection, including technical, reversal, and idiosyncratic volatility factors, which have shown excellent performance in the Guozheng 2000 Index constituents[4] - The machine learning index enhancement strategy based on multiple objectives and models uses GBDT and NN models, trained on different feature datasets and combined to construct a GBDT+NN stock selection factor, which has performed well across various broad-based indices in the A-share market[5] - The dividend style timing + dividend stock selection fixed income+ strategy uses 10 indicators related to economic growth and monetary liquidity to construct a dynamic event factor system for dividend index timing, showing significant stability improvement compared to the CSI Dividend Index total return[6] - The Guozheng 2000 Index enhancement factor's IC mean is 12.54%, with a T-statistic of 12.56, indicating good predictive performance[4] - The GBDT+NN machine learning stock selection factor in the CSI 300 constituents has an IC mean of 11.43% and an annualized excess return of 15.39%[43] - The GBDT+NN machine learning stock selection factor in the CSI 500 constituents has an IC mean of 9.77% and an annualized excess return of 29.48%[48] - The GBDT+NN machine learning stock selection factor in the CSI 1000 constituents has an IC mean of 13.49% and an annualized excess return of 16.10%[53] - The Guozheng 2000 Index enhancement strategy has an annualized excess return of 13.18% and an IR of 1.73[38] - The GBDT+NN CSI 300 Index enhancement strategy has an annualized excess return of 10.86% and an IR of 1.81[47] - The GBDT+NN CSI 500 Index enhancement strategy has an annualized excess return of 10.27% and an IR of 1.71[52] - The GBDT+NN CSI 1000 Index enhancement strategy has an annualized excess return of 15.83% and an IR of 2.34[57] - The dividend stock selection strategy has an annualized return of 18.83% and a Sharpe ratio of 0.89[58] - The dividend timing strategy has an annualized return of 13.58% and a Sharpe ratio of 0.88[58] - The fixed income+ strategy has an annualized return of 7.34% and a Sharpe ratio of 2.17[58]