超长债周报：资金面保持宽松，30，10国债期限利差走阔-20250811

1. Report Industry Investment Rating No relevant content provided. 2. Core Views of the Report - Last week, the bond market rebounded slightly due to relatively loose liquidity, increased central bank repurchase operations, and successful issuance of new local bonds with higher yields than comparable old bonds [1][3][10][34]. - The trading activity of ultra - long bonds decreased slightly last week but remained quite active [1][3][10]. - The term spread of ultra - long bonds widened last week, while the variety spread showed mixed trends, and both were at relatively low absolute levels [1][3][4][10]. - For the 30 - year treasury bond, as of August 8, the spread between the 30 - year and 10 - year treasury bonds was 26BP, at a historically low level. The domestic economy showed resilience in June, but domestic demand was weak. The estimated GDP growth rate in June was about 5.2% year - on - year, up 0.1% from May, still higher than the annual target. However, the growth rates of social consumption and investment declined significantly in June. With deflation risks remaining, the bond market is expected to fluctuate narrowly [2][11]. - For the 20 - year CDB bond, as of August 8, the spread between the 20 - year CDB bond and the 20 - year treasury bond was 5BP, at a historically extremely low level. Similar to the 30 - year treasury bond situation, the bond market is expected to fluctuate narrowly [3][12]. 3. Summary by Relevant Catalogs 3.1 Weekly Review - Ultra - long Bond Review - The bond market rebounded slightly last week. Factors included relatively loose liquidity, increased central bank repurchase operations, and successful issuance of new local bonds with yields 5BP - 7BP higher than comparable old bonds [1][10][34]. - The trading activity of ultra - long bonds decreased slightly but remained quite active [1][10]. - The term spread of ultra - long bonds widened, and the variety spread showed mixed trends [1][4][10]. 3.2 Ultra - long Bond Investment Outlook 3.2.1 30 - year Treasury Bond - As of August 8, the spread between the 30 - year and 10 - year treasury bonds was 26BP, at a historically low level [2][11]. - In June, the domestic economy showed resilience, but domestic demand was weak. The estimated GDP growth rate in June was about 5.2% year - on - year, up 0.1% from May, still higher than the annual target. However, the growth rates of social consumption and investment declined significantly in June. In July, CPI was 0.0% and PPI was - 3.6%, indicating deflation risks [2][11]. - The strong stock market suppresses the bond market sentiment, but the domestic economy still faces downward pressure, and the fundamental factors supporting the bond market have not shown a turning point. The bond market is expected to fluctuate narrowly, and the term spread protection is limited [2][11]. 3.2.2 20 - year CDB Bond - As of August 8, the spread between the 20 - year CDB bond and the 20 - year treasury bond was 5BP, at a historically extremely low level [3][12]. - Similar to the 30 - year treasury bond situation, the domestic economy showed resilience in June but with weak domestic demand, deflation risks remained, and the bond market is expected to fluctuate narrowly. The variety spread protection is limited [3][12]. 3.3 Ultra - long Bond Basic Overview - As of July 31, the balance of ultra - long bonds with a remaining maturity of over 14 years was 22.8873 trillion yuan (excluding asset - backed securities and project revenue notes), accounting for 14.7% of the total bond balance [13]. - Local government bonds and treasury bonds are the main varieties of ultra - long bonds. Treasury bonds accounted for 26.5%, local government bonds 67.5%, policy - based financial bonds 2.0%, government agency bonds 1.9%, commercial bank sub - debt 0.3%, corporate bonds 0.5%, enterprise bonds 0.1%, medium - term notes 1.2%, private bonds 0.0%, and directional instruments 0.0% [13]. - The 30 - year variety has the highest proportion. Bonds with a remaining maturity of 14 - 18 years accounted for 26.5%, 18 - 25 years 26.9%, 25 - 35 years 40.9%, and over 35 years 5.7% [13]. 3.4 Primary Market 3.4.1 Weekly Issuance - Last week (August 4 - 8, 2025), the issuance of ultra - long bonds decreased slightly. A total of 140 billion yuan of ultra - long bonds were issued [18]. - By variety, treasury bonds accounted for 82 billion yuan, local government bonds 56 billion yuan, policy - based bank bonds 0 billion yuan, government - supported agency bonds 0 billion yuan, medium - term notes 0 billion yuan, corporate bonds 2 billion yuan, directional instruments 0 billion yuan, enterprise bonds 0 billion yuan, and bank sub - debt 0 billion yuan [18]. - By term, bonds with a 15 - year term accounted for 8 billion yuan, 20 - year 2 billion yuan, 30 - year 130.1 billion yuan, and 50 - year 0 billion yuan [18]. 3.4.2 This Week's Planned Issuance - The announced issuance plan for ultra - long bonds this week is 55.3 billion yuan in total. Ultra - long treasury bonds account for 35 billion yuan, ultra - long local government bonds 17.8 billion yuan, ultra - long corporate bonds 0 billion yuan, ultra - long medium - term notes 2.5 billion yuan, and ultra - long government - supported agency bonds 0 billion yuan [24]. 3.5 Secondary Market 3.5.1 Trading Volume - Last week, the trading of ultra - long bonds was quite active, with a trading volume of 1.119 trillion yuan, accounting for 13.5% of the total bond trading volume. By variety, the trading volume of ultra - long treasury bonds was 917 billion yuan, accounting for 43.3% of the total treasury bond trading volume; ultra - long local bonds 179.8 billion yuan, accounting for 56.7% of the total local bond trading volume; ultra - long policy - based financial bonds 6.4 billion yuan, accounting for 0.2% of the total policy - based financial bond trading volume; and ultra - long government agency bonds 4.2 billion yuan, accounting for 27.0% of the total government agency bond trading volume [26]. - The trading activity of ultra - long bonds decreased slightly last week. Compared with the previous week, the trading volume decreased by 362.7 billion yuan, and the proportion decreased by 2.5%. Among them, the trading volume of ultra - long treasury bonds decreased by 287.1 billion yuan, and the proportion decreased by 3.2%; ultra - long local bonds decreased by 42.6 billion yuan, and the proportion decreased by 1.7%; ultra - long policy - based financial bonds decreased by 5.7 billion yuan, and the proportion decreased by 0.2%; ultra - long government agency bonds decreased by 3.1 billion yuan, and the proportion decreased by 60.7% [26][27]. 3.5.2 Yield - Last week, the bond market rebounded slightly. In terms of treasury bonds, the yields of 15 - year, 20 - year, 30 - year, and 50 - year bonds changed by - 1BP, 0BP, 1BP, and - 1BP respectively, reaching 1.84%, 1.97%, 1.96%, and 2.00%. For CDB bonds, the yields of 15 - year, 20 - year, 30 - year, and 50 - year bonds changed by 2BP, 2BP, 1BP, and - 1BP respectively, reaching 1.96%, 2.02%, 2.06%, and 2.24%. For local bonds, the yields of 15 - year, 20 - year, and 30 - year bonds changed by 0BP, - 1BP, and 1BP respectively, reaching 2.01%, 2.08%, and 2.10%. For railway bonds, the yields of 15 - year, 20 - year, and 30 - year bonds changed by - 2BP, - 1BP, and 2BP respectively, reaching 2.04%, 2.08%, and 2.14% [34]. - For representative individual bonds, the yield of the 30 - year treasury bond active bond 24 Special Treasury Bond 06 changed by 3BP to 1.97%, and the yield of the 20 - year CDB bond active bond 21 CDB 20 changed by 4BP to 2.00% [35]. 3.6 Spread Analysis 3.6.1 Term Spread - Last week, the term spread of ultra - long bonds widened, and the absolute level was low. The spread between the 30 - year and 10 - year treasury bonds was 26BP, a change of 2BP from the previous week, and it was at the 10% quantile since 2010 [43]. 3.6.2 Variety Spread - Last week, the variety spread of ultra - long bonds showed mixed trends, and the absolute level was low. The spread between the 20 - year CDB bond and the treasury bond was 5BP, and the spread between the 20 - year railway bond and the treasury bond was 11BP, changing by 1BP and - 1BP respectively from the previous week, and both were at the 7% quantile since 2010 [48]. 3.7 30 - year Treasury Bond Futures - Last week, the main contract of the 30 - year treasury bond futures, TL2509, closed at 119.32 yuan, an increase of 0.92%. The total trading volume was 602,000 lots (a decrease of 181,003 lots), and the open interest was 152,600 lots (a decrease of 8,080 lots). The trading volume decreased significantly compared with the previous week, and the open interest decreased slightly [50].