Group 1 - The stock price of Copper Crown Copper Foil dropped by 5.23% to 33.35 CNY per share, with a trading volume of 9.65 billion CNY and a turnover rate of 3.42%, resulting in a total market capitalization of 27.648 billion CNY [1] - Copper Crown Copper Foil, established on October 18, 2010, and listed on January 27, 2022, specializes in the research, manufacturing, and sales of high-precision electronic copper foil [1] - The company's main business revenue composition includes PCB copper foil at 56.84%, lithium battery copper foil at 37.92%, copper flat wire at 4.45%, and other supplementary products at 0.79% [1] Group 2 - According to data from the top ten heavy stocks of funds, one fund under Caitong Securities Asset Management holds a significant position in Copper Crown Copper Foil [2] - Caitong Asset Management's CSI 1000 Index Enhanced A Fund (019402) reduced its holdings by 100 shares in the second quarter, maintaining 29,200 shares, which accounts for 3.29% of the fund's net value, making it the second-largest heavy stock [2] - The fund has achieved a return of 21.8% this year, ranking 2017 out of 4222 in its category, and a return of 56.23% over the past year, ranking 1502 out of 3776 [2]

Group 1 - The core viewpoint of the news is that Dabo Medical (002901.SZ) has reported its semi-annual results for 2025, highlighting significant institutional investment in the company [1] - As of August 21, 2025, a total of 14 institutional investors hold shares in Dabo Medical, with a combined holding of 192 million shares, representing 46.36% of the total share capital [1] - The top ten institutional investors account for 46.23% of the total shares, with a decrease of 1.08 percentage points compared to the previous quarter [1] Group 2 - In the public fund sector, one public fund, Southern CSI 1000 ETF, increased its holdings slightly, while six new public funds were disclosed, including Dachen Multi-Strategy Mixed (LOF) A and Dachen Quality Medical Stock A [2] - Three public funds were not disclosed in the current period compared to the previous quarter, including Huabao CSI Medical ETF and Fuyong Medical Health Mixed Fund A [2] - Regarding foreign investment, one foreign fund, Hong Kong Central Clearing Limited, increased its holdings by 0.46% compared to the previous period [2]

Quantitative Factors and Construction Methods Factor Name: Liquidity - **Construction Idea**: Measures the market's preference for high-liquidity assets, reflecting the demand for stocks with higher turnover rates [9][14] - **Construction Process**: - **TO**: Average logarithmic turnover rate over the past 243 trading days - **Liquidity Beta**: Regression of individual stock turnover rates against market turnover rates over the past 243 trading days [14] - **Evaluation**: Demonstrated the highest positive return among style factors in the recent week, indicating a significant increase in demand for high-liquidity assets [9] - **Performance**: Weekly return of 5.44%, monthly return of 13.08%, and annualized return of 33.79% over the past year [11] Factor Name: Volatility - **Construction Idea**: Captures the market's preference for high-volatility stocks, reflecting risk appetite [9][14] - **Construction Process**: - **Stdvol**: Standard deviation of daily returns over the past 243 trading days - **Ivff**: Fama-French 3-factor idiosyncratic volatility over the past 243 trading days - **Range**: Difference between the highest and lowest prices over the past 243 trading days - **MaxRet_6**: Average return of the six highest daily returns over the past 243 trading days - **MinRet_6**: Average return of the six lowest daily returns over the past 243 trading days [14] - **Evaluation**: Showed a significant improvement in weekly performance, reflecting increased market risk appetite [9] - **Performance**: Weekly return of 5.03%, monthly return of 12.37%, and annualized return of 25.55% over the past year [11] Factor Name: Beta - **Construction Idea**: Represents the market's preference for high-beta stocks, indicating sensitivity to market movements [9][14] - **Construction Process**: Bayesian shrinkage of market beta [14] - **Evaluation**: Significant weekly performance improvement, indicating a strong preference for high-beta stocks [9] - **Performance**: Weekly return of 4.28%, monthly return of 12.51%, and annualized return of 33.02% over the past year [11] Factor Name: Growth - **Construction Idea**: Measures the market's preference for growth-oriented stocks, focusing on financial growth metrics [9][14] - **Construction Process**: - **Delta ROE**: Average change in ROE over the past three years - **Sales Growth**: 3-year compound growth rate of TTM sales revenue - **Na Growth**: 3-year compound growth rate of TTM net assets [14] - **Evaluation**: Improved weekly performance, reflecting increased market interest in growth stocks [9] - **Performance**: Weekly return of 1.65%, monthly return of 0.77%, and annualized return of 1.32% over the past year [11] Factor Name: Certainty - **Construction Idea**: Reflects the market's preference for stocks with higher predictability and stability [10][14] - **Construction Process**: - **Instholder Pct**: Proportion of holdings by mutual funds - **Cov**: Analyst coverage adjusted for market capitalization - **Listdays**: Number of days since the stock's listing [14] - **Evaluation**: Experienced a significant decline in weekly performance, indicating reduced confidence in certainty-based strategies [10] - **Performance**: Weekly return of -3.99%, monthly return of -9.10%, and annualized return of -17.07% over the past year [11] Factor Name: Value - **Construction Idea**: Measures the market's preference for undervalued stocks based on valuation metrics [10][14] - **Construction Process**: - **BP**: Book-to-price ratio - **EP**: Earnings yield [14] - **Evaluation**: Significant decline in weekly performance, reflecting reduced market interest in value-based strategies [10] - **Performance**: Weekly return of -4.75%, monthly return of -8.10%, and annualized return of -16.96% over the past year [11] Factor Name: Size - **Construction Idea**: Captures the market's preference for small-cap stocks [10][14] - **Construction Process**: Logarithm of total market capitalization [14] - **Evaluation**: Experienced the largest decline among style factors, indicating reduced market interest in small-cap stocks [10] - **Performance**: Weekly return of -5.96%, monthly return of -12.84%, and annualized return of -54.81% over the past year [11] --- Factor Backtesting Results Weekly Performance - **Liquidity**: 5.44% - **Volatility**: 5.03% - **Beta**: 4.28% - **Growth**: 1.65% - **Certainty**: -3.99% - **Value**: -4.75% - **Size**: -5.96% [11] Monthly Performance - **Liquidity**: 13.08% - **Volatility**: 12.37% - **Beta**: 12.51% - **Growth**: 0.77% - **Certainty**: -9.10% - **Value**: -8.10% - **Size**: -12.84% [11] Annualized Performance (Past Year) - **Liquidity**: 33.79% - **Volatility**: 25.55% - **Beta**: 33.02% - **Growth**: 1.32% - **Certainty**: -17.07% - **Value**: -16.96% - **Size**: -54.81% [11]