流动性和机构行为周度观察：税期资金面收敛，跨季仍有扰动-20250922

Report Industry Investment Rating - Not provided in the document Core Viewpoints - From September 15 - 19, 2025, the central bank net - injected liquidity during the tax period, and the 14 - day reverse repurchase was changed to "American tender". The money market tightened under the influence of the tax period, and there may still be some volatility pressure in the second half of September due to the cross - quarter effect [2][6][7] - From September 15 - 21, 2025, the net payment scale of government bonds increased, and the net payment scale of government bonds from September 22 - 28 is expected to be 413.9 billion yuan [8] - As of September 19, 2025, the maturity yields of inter - bank certificates of deposit (NCDs) increased overall, and the net financing amount of NCDs turned positive. The maturity repayment volume of NCDs from September 22 - 28 is expected to be 969.2 billion yuan, with increased pressure on renewal [9] - From September 15 - 19, 2025, the average leverage ratio of the inter - bank bond market decreased, and the durations of medium - long - term and short - term interest - style pure bond funds both decreased marginally [10] Summary by Directory 1. Money Market - From September 15 - 19, 2025, the central bank's 7 - day reverse repurchase injected 1.8268 trillion yuan and matured 1.2645 trillion yuan, and the treasury cash injected 150 billion yuan and matured 120 billion yuan, with a total net injection of 592.3 billion yuan. On September 15, a 600 - billion - yuan 6 - month outright reverse repurchase operation was carried out, with an incremental renewal of 300 billion yuan. From September 22 - 26, 2025, 1.8268 trillion yuan of 7 - day reverse repurchases and 300 billion yuan of MLF will mature [6] - On September 19, 2025, the central bank adjusted the 14 - day reverse repurchase operation to "fixed quantity, interest - rate tender, and multiple - price winning bids", which helps reduce bank liability costs and highlights the policy - rate position of the 7 - day reverse repurchase operation rate. It is expected that 14 - day reverse repurchases will be appropriately operated in late September to stabilize the money market [7] - From September 15 - 19, 2025, affected by the tax period, the average values of DR001 and R001 increased by 7.7 and 8.7 basis points respectively compared with September 8 - 12, and the average values of DR007 and R007 increased by 4.8 and 4.0 basis points respectively [7] 2. Government Bonds - From September 15 - 21, 2025, the net payment scale of government bonds was about 448 billion yuan, an increase of about 103.7 billion yuan compared with September 8 - 14. The net financing amount of treasury bonds was about 397.1 billion yuan, and that of local government bonds was about 50.9 billion yuan. From September 22 - 28, 2025, the net payment scale of government bonds is expected to be 41.39 billion yuan, with a net financing of about - 89.65 billion yuan for treasury bonds and about 131.04 billion yuan for local government bonds [8] 3. Inter - bank Certificates of Deposit (NCDs) - As of September 19, 2025, the maturity yields of 1 - month and 3 - month NCDs were 1.5750%, an increase of 2.4 and 1.5 basis points respectively compared with September 12, and the maturity yield of 1 - year NCDs was 1.6750%, an increase of 0.5 basis points compared with September 12 [9] - From September 15 - 21, 2025, the net financing amount of NCDs was about 134.4 billion yuan, compared with about - 468.3 billion yuan from September 8 - 14. The maturity repayment volume of NCDs from September 22 - 28 is expected to be 969.2 billion yuan, with increased pressure on renewal [9] 4. Institutional Behavior - From September 15 - 19, 2025, the average calculated leverage ratio of the inter - bank bond market was 107.32%, compared with 107.37% from September 8 - 12. On September 19 and 12, the calculated leverage ratios were about 107.45% and 107.44% respectively [10] - Based on the calculation results, the durations of medium - long - term and short - term interest - style pure bond funds both decreased marginally. On September 19, 2025, the median duration (MA5) of medium - long - term interest - style pure bond funds was 4.04 years, a weekly decrease of 0.70 years, at the 58.7% quantile since the beginning of 2022; the median duration (MA5) of short - term interest - style pure bond funds was 1.56 years, a weekly decrease of 0.17 years, at the 12.2% quantile since the beginning of 2022 [10]