Core Viewpoint - The article emphasizes the importance of Return on Equity (ROE) as a key indicator of a company's profitability and the need to identify stocks with stable future ROE to enhance investment returns [1][90]. Group 1: ROE Downward Risk - ROE is a critical measure of a company's ability to generate profit from its equity, with higher ROE indicating stronger profitability and potential returns for investors [1][90]. - Historical data shows that selecting high ROE stocks based solely on past performance does not guarantee future returns, as evidenced by backtesting from April 2010 to April 2024 [1][3]. - The analysis indicates that stocks with high ROE in previous years often experience declines in future ROE, which negatively impacts overall portfolio returns [6][9]. Group 2: Financial Stability Assessment - To identify companies with stable future ROE, the article outlines four financial dimensions: profitability stability, growth stability, leverage stability, and cash flow stability [10][91]. - Specific indicators are used to measure these dimensions, such as the standard deviation of sales net profit margin and ROE over the past nine quarters [11][12]. - The stability factors derived from these dimensions show varying degrees of effectiveness in stock selection across different indices, with notable results in the CSI All Share Index [16][22][31]. Group 3: Stability Factor Application - The article discusses the application of stability factors to filter high ROE stocks, aiming to identify those likely to maintain their ROE above 10% in the future [58][92]. - A significant proportion of stocks (73.44%) in the high ROE category are expected to maintain their ROE, with this percentage increasing to 84.33% for the most stable stocks [62][92]. - The performance of portfolios constructed from stocks with high stability factors shows improved returns compared to general high ROE stock portfolios, with annualized returns reaching 15.80% for the most stable stocks [93][83]. Group 4: Multi-Factor Selection in High ROE Stocks - The article suggests further enhancing returns by applying multi-factor selection within the high ROE and high stability stock pool, focusing on factors such as growth, profitability, and volatility [79][78]. - The multi-factor optimized portfolio demonstrates superior performance, achieving an annualized return of 22.36% compared to the benchmark index [83][94]. - The analysis indicates that the optimized portfolio not only outperforms the high ROE stock pool but also maintains a favorable risk-return profile, as reflected in its Sharpe ratio [83][94].