Quantitative Models and Construction Methods - **Model Name**: Three-Dimensional Sentiment Model **Model Construction Idea**: The model observes market sentiment from three perspectives: sentiment expectation, sentiment temperature, and sentiment concentration, corresponding to high-frequency, medium-frequency, and low-frequency sentiment fluctuations respectively [7] **Model Construction Process**: 1. **Sentiment Expectation**: - **Indicator Significance**: Reflects short-term market sentiment through futures and options data. Futures basis rate and the inverse of options PCR (Put-Call Ratio) are used to measure sentiment [6][8] - **Formula**: $ \text{Futures Basis Rate} = \frac{\text{Futures Price} - \text{Spot Price}}{\text{Spot Price}} $ $ \text{Sentiment Expectation Composite Indicator} = \text{Mean Value + Principal Component Analysis} $ - **Evaluation**: Sentiment expectation rising indicates optimistic short-term market sentiment, while a decline suggests cautious sentiment [6][8] 2. **Sentiment Temperature**: - **Indicator Significance**: Quantifies market trading heat and fund activity, focusing on institutional/main funds as the core force. Uses "main fund buy-in rate" smoothed and calculated as a three-year rolling percentile [12] - **Formula**: $ \text{Main Fund Buy-in Rate} = \frac{\text{Large Buy-in Amount}}{\text{Total Market Turnover}} $ - **Evaluation**: Sentiment temperature rising indicates increased fund activity, while a decline suggests cooling sentiment [12] 3. **Sentiment Concentration**: - **Indicator Significance**: Measures the correlation of multi-assets in the A-share market. Uses the first principal component variance contribution rate of the CITIC three-level industry system index, smoothed with a rolling window [16] - **Evaluation**: Higher sentiment concentration indicates increased asset correlation, suggesting stronger emotional influence on the market. Extreme values above the warning line (0.83) may signal long-term market turning points [16] Model Backtesting Results - **Sentiment Expectation**: Current value as of February 20, 2025: 0.7696, up 31.02% from the previous week [9][22] - **Sentiment Temperature**: Current value as of February 20, 2025: 0.6952, up 4.43% from the previous week [13][22] - **Sentiment Concentration**: Current value as of February 20, 2025: 0.6884, down 2.17% from the previous week [18][22]