金融工程定期：12月转债配置：转债估值偏贵，看好偏股低估风格

• The report constructs a valuation indicator called "Hundred Yuan Conversion Premium Rate" to compare the valuation of convertible bonds and their underlying stocks over time[3] - The "Hundred Yuan Conversion Premium Rate" rolling three-year percentile is at 98.00%, and the rolling five-year percentile is at 94.50% as of December 12, 2025[3][16] - The report constructs a valuation indicator called "Adjusted YTM - Credit Bond YTM" to compare the valuation of debt-biased convertible bonds and credit bonds[4] - The "Adjusted YTM - Credit Bond YTM" median is -3.95% as of December 12, 2025, indicating a low overall cost-effectiveness of debt-biased convertible bonds[4][16] - The report constructs two valuation deviation factors: Conversion Premium Deviation Factor and Theoretical Value Deviation Factor (Monte Carlo Model), and combines them into a Comprehensive Convertible Bond Valuation Factor[5] - The Comprehensive Convertible Bond Valuation Factor is constructed as follows: $\text{Comprehensive Convertible Bond Valuation Factor} = \text{Rank}(\text{Conversion Premium Deviation}) + \text{Rank}(\text{Theoretical Value Deviation (Monte Carlo Model)})$ [22] - The Conversion Premium Deviation Factor is calculated as: $\text{Conversion Premium Deviation} = \text{Conversion Premium} - \text{Fitted Conversion Premium}$ [22] - The Theoretical Value Deviation Factor (Monte Carlo Model) is calculated as: $\text{Theoretical Value Deviation} = \frac{\text{Convertible Bond Closing Price}}{\text{Theoretical Value}} - 1$ [22] - The report constructs three low-valuation equal-weight indices: Equity-biased Convertible Bond Low Valuation Index, Balanced Convertible Bond Low Valuation Index, and Debt-biased Convertible Bond Low Valuation Index[20] - The report constructs a Convertible Bond Style Rotation Portfolio using Convertible Bond 20-day Momentum and Convertible Bond Volatility Deviation as market sentiment capture indicators, with bi-weekly rebalancing[5][28] - The Convertible Bond Style Market Sentiment Capture Indicator is constructed as follows: $\text{Convertible Bond Style Market Sentiment Capture Indicator} = \text{Rank}(\text{Convertible Bond 20-day Momentum}) + \text{Rank}(\text{Volatility Deviation})$ [29] Model Backtest Results - Comprehensive Convertible Bond Valuation Factor in equity-biased, balanced, and debt-biased convertible bonds enhanced excess returns of -2.89%, -0.82%, and -0.74% respectively over the past two weeks as of December 12, 2025[5][24] - Equity-biased Convertible Bond Low Valuation Index: Annualized Return 25.86%, Annualized Volatility 20.68%, Maximum Drawdown 22.94%, IR 1.25, Calmar Ratio 1.13[25] - Balanced Convertible Bond Low Valuation Index: Annualized Return 14.96%, Annualized Volatility 11.97%, Maximum Drawdown 15.95%, IR 1.25, Calmar Ratio 0.94[25] - Debt-biased Convertible Bond Low Valuation Index: Annualized Return 12.11%, Annualized Volatility 9.83%, Maximum Drawdown 17.78%, IR 1.23, Calmar Ratio 0.68[25] - Convertible Bond Style Rotation: Annualized Return 24.52%, Annualized Volatility 16.81%, Maximum Drawdown 15.89%, IR 1.46, Calmar Ratio 1.54[34]