Quantitative Models and Construction Methods 1. Model Name: Diffusion Index Model - **Model Construction Idea**: The model is used to monitor the critical points of trend changes in the micro-cap stock index by analyzing the distribution of stock price movements over a specific time window[6][38]. - **Model Construction Process**: The model calculates the diffusion index based on the relative price changes of all constituent stocks in the micro-cap stock index over a given time window. For example, if the horizontal axis is 0.95 and the vertical axis is 15 days, the value of 0.51 indicates that after 5 days (review period from T=20 to T=15), if all stocks in the micro-cap index drop by 5%, the diffusion index value is 0.51[38]. - Current diffusion index value: 0.87 (horizontal axis = 20, vertical axis = 1.00)[38]. - **Model Evaluation**: The model shows that the current distribution is relatively uniform, indicating that the time window has little impact, and the main influence comes from the spatial distribution[38]. 2. Model Name: First Threshold Method (Left-Side Trading) - **Model Construction Idea**: This method triggers a sell signal when the diffusion index reaches a predefined threshold[6][42]. - **Model Construction Process**: - On May 8, 2025, the model triggered a sell signal when the diffusion index reached 0.9850[42]. 3. Model Name: Delayed Threshold Method (Right-Side Trading) - **Model Construction Idea**: Similar to the first threshold method but with a delayed response to confirm the trend[6][44]. - **Model Construction Process**: - On May 15, 2025, the model triggered a sell signal when the diffusion index reached 0.8975[46]. 4. Model Name: Dual Moving Average Method (Adaptive Trading) - **Model Construction Idea**: This method uses two moving averages to adaptively identify trading signals based on the diffusion index[6][47]. - **Model Construction Process**: - On August 4, 2025, the model issued a sell signal based on the dual moving average strategy[47]. --- Model Backtesting Results 1. Diffusion Index Model - Current diffusion index value: 0.87[38]. 2. First Threshold Method - Triggered sell signal at diffusion index value: 0.9850[42]. 3. Delayed Threshold Method - Triggered sell signal at diffusion index value: 0.8975[46]. 4. Dual Moving Average Method - Triggered sell signal on August 4, 2025[47]. --- Quantitative Factors and Construction Methods 1. Factor Name: Momentum Factor - **Factor Construction Idea**: Measures the tendency of stocks to continue their past performance[5][33]. - **Factor Construction Process**: - Weekly rank IC: 0.224 - Historical average rank IC: -0.005[5][33]. 2. Factor Name: Beta Factor - **Factor Construction Idea**: Captures the sensitivity of stock returns to market movements[5][33]. - **Factor Construction Process**: - Weekly rank IC: 0.146 - Historical average rank IC: 0.006[5][33]. 3. Factor Name: Illiquidity Factor - **Factor Construction Idea**: Measures the impact of trading volume on stock price changes[5][33]. - **Factor Construction Process**: - Weekly rank IC: 0.14 - Historical average rank IC: 0.041[5][33]. 4. Factor Name: Unadjusted Stock Price Factor - **Factor Construction Idea**: Reflects the raw stock price without adjustments for splits or dividends[5][33]. - **Factor Construction Process**: - Weekly rank IC: 0.131 - Historical average rank IC: -0.015[5][33]. 5. Factor Name: PE_TTM Reciprocal Factor - **Factor Construction Idea**: Represents the inverse of the price-to-earnings ratio based on trailing twelve months[5][33]. - **Factor Construction Process**: - Weekly rank IC: 0.125 - Historical average rank IC: 0.017[5][33]. --- Factor Backtesting Results 1. Momentum Factor - Weekly rank IC: 0.224 - Historical average rank IC: -0.005[5][33]. 2. Beta Factor - Weekly rank IC: 0.146 - Historical average rank IC: 0.006[5][33]. 3. Illiquidity Factor - Weekly rank IC: 0.14 - Historical average rank IC: 0.041[5][33]. 4. Unadjusted Stock Price Factor - Weekly rank IC: 0.131 - Historical average rank IC: -0.015[5][33]. 5. PE_TTM Reciprocal Factor - Weekly rank IC: 0.125 - Historical average rank IC: 0.017[5][33].