量化信用策略：票息策略≠防御空间

Group 1: Report's Investment Rating - No information provided on the report's industry investment rating Group 2: Core Views - This week, the simulated portfolio's returns turned negative, with the credit - style portfolio's retracement relatively controllable. Among the interest - rate style portfolios, the short - end sinking of urban investment bonds and the sinking strategy of certificates of deposit (CDs) had relatively high weekly return readings, both around - 0.41%. Among the credit - style portfolios, the short - end sinking of urban investment bonds and the sinking strategy of CDs had smaller retracements, with return readings of - 0.16% and - 0.16% respectively [2][15][16]. - Since July, the CD strategy has a higher odds. The average weekly return of the credit - style CD heavy - position portfolio dropped to - 0.17%, a decrease of about 24bp from last week. It is also one of the few strategies with positive cumulative returns in the past three weeks. The corresponding interest - rate style portfolio underperformed the defensive strategy again after two weeks [2][19]. - In terms of return sources, the coupon of the credit - style urban investment bond heavy - position strategy is approaching the annual low and can hardly withstand recent fluctuations. The coupon contributions of the credit - style portfolio this week generally fell within the range of - 25% to - 5%, and capital gains significantly dragged down the comprehensive return [3][27]. - In the past four weeks, except for the short - end sinking of urban investment bonds, the remaining mainstream strategies generally lacked excess returns. From the perspective of strategy terms, short - term strategies significantly outperformed. Short - term CD strategies outperformed the benchmark, and the excess return of urban investment sinking reached the highest since late June [4][31][33]. Group 3: Summary by Relevant Catalogs 1. Portfolio Strategy Return Tracking 1.1 Portfolio Weekly Return Overview - As of August 15, this year, the cumulative returns of the interest - rate style and credit - style portfolios have significantly lagged behind the same period in the past two years. Among the main credit - style portfolios, the cumulative comprehensive returns of the long - term industrial portfolio, the short - end sinking of urban investment bonds, and the duration portfolio led, reaching 1.48%, 1.39%, and 1.22% respectively. The cumulative returns of the credit - style portfolios all exceeded the corresponding interest - rate style portfolios, while the cumulative returns of the interest - rate style portfolios basically fell back to within 1% [10]. - The average weekly return of the credit - style CD heavy - position portfolio dropped to - 0.17%, a decrease of about 24bp from last week. The weekly return of the urban investment bond heavy - position portfolio decreased by 38.6bp to - 0.27% compared with the previous week. The weekly return of the secondary bond heavy - position portfolio decreased by more than 40bp, but its absolute return performance was slightly stronger than that of the interest - rate style portfolio. The average return of the long - term bond heavy - position strategy dropped to - 0.55%, a decrease of about 64bp compared with the previous week [2][19]. 1.2 Portfolio Weekly Return Sources - The coupons of the main strategy portfolios continued to decline. The coupons of the short - end sinking and dumbbell - shaped portfolios of urban investment bonds were around an annualized 1.92% and 1.97% respectively, less than 5bp away from the annual low. The coupon of the secondary bond duration portfolio was still 14bp away from the low point, and the coupon volatility remained high [3][27]. 2. Credit Strategy Excess Return Tracking - In the past four weeks, the cumulative excess returns of the short - end sinking of urban investment bonds, the bullet - shaped portfolio of commercial financial bonds, and the sinking strategy portfolio of secondary bonds reached 16.2bp, 0.9bp, and 0.6bp respectively, while the cumulative readings of the remaining strategy portfolios dropped to the negative range. This week's weak performance widened the gap between the cumulative returns of the heavy - position strategy of Tier 2 and perpetual bonds and the urban investment bond heavy - position strategy, with the cumulative excess return dropping to below - 22bp [4][31]. - From the perspective of strategy terms, short - term strategies significantly outperformed. Short - term CD strategies outperformed the benchmark, and the excess return of urban investment sinking reached the highest since late June. In the medium - and long - term, all strategies showed negative excess returns, except that the excess return of the short - end sinking of urban investment bonds reached 9.7bp. The negative deviations of Tier 2 capital bonds and the bullet - shaped portfolio of commercial financial bonds from the benchmark were within 2bp, also having a certain defensive property [4][33]. Appendix: Simulated Portfolio Allocation Method - The simulated portfolio has some limitations, including the distortion of the portfolio allocation method and errors in the return calculation method. The actual product's bond allocation in terms of grade and term distribution is more complex and may change strategies according to market conditions. The fixed bond ratio in the simulated portfolio may be distorted, and there are some assumptions and simplifications in the calculation method of coupon and capital gains [5][47]