债市机构行为周报（9月第1周）：利率波动“基金化”-20250907

1. Report Industry Investment Rating No information provided in the content. 2. Core View of the Report - The pricing power of funds in the bond market has further increased, and there are still short - term long - trading opportunities. The high correlation between funds and interest rate trends has been further strengthened this year, and low interest rate fluctuations imply the enhancement of funds' pricing power in the bond market. Some "unexplained" interest rate increases may be due to the lack of bond - receiving institutions. The impact of fund institutional behavior on interest rate fluctuations may further expand, and short - term redemption pressure is controllable [2][11][15] 3. Summary According to the Directory 3.1 This Week's Institutional Behavior Review - Correlation between funds and interest rates: The high correlation between funds and interest rate trends is not new. Since 2024, the behavior of funds and interest rate trends have shown high correlation, and this year, the low - level fluctuation of interest rates has implied the further improvement of funds' pricing power in the bond market, which may be related to bank wealth management outsourcing [2][11][12] - "Unexplained" interest rate increases: This phenomenon may be related to the lack of bond - receiving institutions. Insurance institutions have reduced their allocation of national bonds since 2024, and rural commercial banks' intention to buy more as the interest rate adjusts is gradually decreasing [15] 3.2 Yield Curve - Treasury bonds: Short - term yields increased, while medium - and long - term yields decreased. The 1Y yield increased by 3bp, the 3Y yield increased by 1bp, the 5Y yield decreased by 2bp, the 7Y yield decreased by 1bp, the 10Y yield decreased by 1bp, the 15Y yield increased by 3bp, and the 30Y yield decreased by 3bp [17] - China Development Bank bonds: Yields decreased overall. The 1Y yield increased by 1bp, the 3Y yield decreased by 1bp, the 5Y yield decreased by about 2bp, the 7Y yield decreased by 2bp, the 10Y yield decreased by about 1bp, the 15Y yield decreased by 2bp, and the 30Y yield decreased by 1bp [17] 3.3 Term Spread - Treasury bonds: The interest spread increased, and the short - term spread narrowed while the long - term spread was differentiated. The 1Y - DR001 interest spread remained flat overall, and the 1Y - DR007 interest spread increased by 10bp [20] - China Development Bank bonds: The interest spread increased, and the short - term spread narrowed while the long - term spread was differentiated. The 1Y - DR001 interest spread increased by 2bp, and the 1Y - DR007 interest spread increased by about 8bp [22] 3.4 Bond Market Leverage and Funding Situation - Leverage ratio: It decreased to 107.14%. From September 1st to September 5th, 2025, the leverage ratio fluctuated and increased within the week. As of September 5th, it was about 107.14%, up 0.30pct from last Friday and 0.07pct from Monday [25] - Average daily trading volume of pledged repurchase: From September 1st to September 5th, the average daily trading volume of pledged repurchase was about 7.3 trillion yuan, a decrease of 0.24 trillion yuan compared with last week. The average daily trading volume of overnight pledged repurchase was 7.6 trillion yuan, a decrease of 0.43 trillion yuan month - on - month. The average overnight trading volume accounted for 88.35%, an increase of 2.89pct month - on - month [28][33] - Funding situation: Bank - based fund outflows first increased and then decreased. The main fund inflow party was funds, and the outflows of money market funds first decreased and then increased. DR007 and R007 fluctuated and decreased [34] 3.5 Duration of Medium - and Long - Term Bond Funds - Median duration: The median duration of medium - and long - term bond funds decreased. As of September 5th, the median duration (de - leveraged) was 2.77 years, a decrease of 0.04 years from last Friday; the median duration (including leverage) was 2.95 years, a decrease of 0.16 years from last Friday [45] - Duration of different types of bond funds: The median duration (including leverage) of interest - rate bond funds decreased to 3.75 years, a decrease of 0.16 years from last Friday; the median duration (including leverage) of credit bond funds decreased to 2.72 years, a decrease of 0.12 years from last Friday [51] 3.6 Category Strategy Comparison - Sino - US interest rate spread: It widened overall. The 1Y spread widened by 23bp, the 2Y spread widened by about 12bp, the 3Y spread widened by 13bp, the 5Y spread widened by 8bp, the 7Y spread widened by 11bp, the 10Y spread widened by 11bp, and the 30Y spread widened by 7bp [55] - Implied tax rate: The short - term spread narrowed, and the long - term spread was differentiated. As of September 5th, the 1Y spread between China Development Bank bonds and treasury bonds narrowed by about 1bp, the 3Y spread narrowed by 2bp, the 5Y spread changed by less than 1bp, the 7Y spread narrowed by 1bp, the 10Y spread widened by 1bp, the 15Y spread narrowed by 5bp, and the 30Y spread widened by 2bp [56] 3.7 Bond Lending Balance Changes - On September 5th, the lending concentration of active 10Y treasury bonds, active 10Y China Development Bank bonds, and active 30Y treasury bonds increased; the lending concentration of the second - active 10Y China Development Bank bonds decreased, and the lending concentration of the second - active 10Y treasury bonds remained unchanged. In terms of institutions, the lending of large - scale banks and other institutions decreased, while that of small - and medium - sized banks and securities firms increased [57]