超长债周报：30-10 利差有望阶段性压缩-20251020

Report Industry Investment Rating No relevant content provided. Core Viewpoints - Despite the escalation of Sino-US trade frictions last week, the export data in September remained strong. The inflation rate increased year-on-year in September, while the overall financial data continued to face pressure. Coupled with the sharp decline in the A-share market, the bond market rebounded after bottoming out, and the trading of ultra-long bonds was very active. The term spread of ultra-long bonds narrowed, and the absolute level was low, while the variety spread widened, and the absolute level was also low [1][3][10]. - Considering the economic situation, the probability of a bond market rebound in October is high. With the release of the third-quarter economic data next Monday, it is expected that the GDP growth rate in the third quarter will be 4.5%. Given the weak economy, the monetary policy is expected to continue to be relaxed, and the bond market rebound will continue. It is expected that the 30 - 10 spread will compress periodically, and the variety spread of 20-year China Development Bank bonds will also compress again in the short term [2][3][11]. Summary by Directory Weekly Review Ultra-long Bond Review - Last week, the bond market rebounded after bottoming out due to multiple factors. The trading activity of ultra-long bonds increased slightly, with the term spread narrowing and the variety spread widening [1][10]. Ultra-long Bond Investment Outlook - 30-year Treasury Bonds: As of October 17, the spread between 30-year and 10-year Treasury bonds was 38BP, at a historically low level. With the expected bond market rebound, the 30 - 10 spread is expected to compress periodically [2][11]. - 20-year China Development Bank Bonds: As of October 17, the spread between 20-year China Development Bank bonds and 20-year Treasury bonds was 10BP, at a historically extremely low level. The variety spread of 20-year China Development Bank bonds is expected to compress again in the short term [3][12]. Ultra-long Bond Basic Overview - As of September 30, the balance of outstanding ultra-long bonds was 23.7 trillion yuan, accounting for 15.0% of the total bond balance. Local government bonds and Treasury bonds are the main varieties. In terms of remaining maturity, the 30-year variety has the highest proportion [13]. Primary Market Weekly Issuance - Last week (October 12 - 17, 2025), the issuance of ultra-long bonds increased slowly, with a total issuance of 577 million yuan. Treasury bonds accounted for 400 million yuan, and local government bonds accounted for 177 million yuan [20]. This Week's Planned Issuance - The announced ultra-long bond issuance plan for this week totals 1,181 million yuan, all of which are ultra-long local government bonds [26]. Secondary Market Trading Volume - Last week, the trading of ultra-long bonds was very active, with a trading volume of 10,792 billion yuan, accounting for 11.8% of the total bond trading volume. The trading activity increased slightly compared with the previous week [29][30]. Yield - Last week, the yields of various types of ultra-long bonds changed. For example, the yields of 15-year, 20-year, 30-year, and 50-year Treasury bonds changed by -1BP, -2BP, -3BP, and -2BP respectively [37]. Spread Analysis - Term Spread: Last week, the term spread of ultra-long bonds narrowed, and the absolute level was low. The spread between 30-year and 10-year Treasury bonds was 38BP, 4BP lower than the previous week [46]. - Variety Spread: Last week, the variety spread of ultra-long bonds widened, and the absolute level was low. The spreads between 20-year China Development Bank bonds and Treasury bonds and between 20-year railway bonds and Treasury bonds were 10BP and 15BP respectively [52]. 30-year Treasury Bond Futures - Last week, the main contract of 30-year Treasury bond futures, TL2512, closed at 115.87 yuan, an increase of 1.67%. The total trading volume and open interest increased significantly compared with the previous week [56].