源达研究报告：A股研发因子选股策略研究：从因子分析到组合构建

Group 1 - The definition of R&D factor includes both expense and capitalized expenditures, with A-share companies fully disclosing R&D expenses since 2019 [2][6][32] - R&D expenses are analyzed using three factors: R&D expenses/market value, R&D expenses/revenue, and R&D expense growth rate, utilizing data from January 31, 2019, to December 31, 2025 [2][11][42] Group 2 - The R&D expenses TTM/market value factor shows strong predictive ability and stability, with an average IC of 0.04 and a Sharpe ratio of 1.27, indicating high risk-adjusted returns [3][12][43] - The R&D expenses TTM/revenue factor performs well in small-cap stocks, achieving a multi-long annual return of 19.91% in the CSI 1000 index, but carries significant drawdown risk [3][19][51] - The R&D expense growth rate factor has weak stock selection effectiveness, with average IC and Rank IC being very low, indicating it is ineffective in the CSI 300 index [3][22][56] Group 3 - A single-factor strategy using R&D expenses/market value resulted in a total return of 605.36% from January 31, 2019, to January 29, 2026, outperforming the CSI 300 by 556.49% [4][35][28] - The latest selected stocks based on the R&D expenses/market value strategy include China National Petroleum Engineering, BOE Technology Group, and Hisense Home Appliances [4][35][28] Group 4 - The R&D expenses TTM/market value factor is a typical growth style factor, showing positive stock selection effectiveness in most years from 2019 to 2025, particularly in 2022-2023 [17][47][48] - The analysis of factor correlations suggests that the number of rating agencies and operating cash flow/revenue are ideal auxiliary factors to enhance the R&D factor's effectiveness [23][25]