债市机构行为周报（8月第2周）：股份行机构行为触发做多信号-20250817

Group 1: Report Overview - The report is a fixed - income weekly report titled "Institutional Behavior of Joint - stock Banks Triggers Bullish Signals - Weekly Report on Bond Market Institutional Behavior (Week 2 of August)" dated August 17, 2025 [1][2] - The chief analyst is Yan Ziqi, and the analyst is Hong Ziyan [2] Group 2: Core Viewpoints - The bond market's bullish space has opened, and institutional behavior indicators have triggered bullish signals. A trading - following strategy based on joint - stock banks' transactions may have a high win - rate [2][3][12] - Although there are short - term bearish factors in the bond market, the medium - and long - term trend remains unchanged, and the bullish space has opened [4][13] Group 3: Weekly Institutional Behavior Review 3.1 General Comment - A rate - timing signal was developed based on joint - stock banks' trading behavior. In the past year, it gave 5 long - lasting large - wave signals with a 100% win - rate on large waves. On August 13, it triggered a bullish signal that lasted for 3 days [3][12] - Big banks were the main buyers of short - and medium - term bonds, while funds and securities firms sold long - term interest - rate bonds, and rural commercial banks, insurance companies, and city commercial banks were the main buyers. The bond market's capital supply remained loose, and the overall spread of the curve widened [4][13] 3.2 Yield Curve - The yields of treasury bonds and China Development Bank bonds generally increased. For treasury bonds, the 1Y yield rose 2bp, 3Y fell 1bp, 5Y rose about 4bp, 7Y rose 5bp, 10Y rose 6bp, 15Y rose about 7bp, and 30Y rose 9bp. For China Development Bank bonds, the 1Y yield rose 3bp, 3Y rose 4bp, 5Y rose 8bp, 7Y rose 7bp, 10Y rose 8bp, 15Y rose 7bp, and 30Y rose 9bp [15] 3.3 Term Spread - For treasury bonds, the interest spread increased, and the term spread generally widened. For China Development Bank bonds, the interest - spread inversion deepened, and the short - end spread widened [16][19] Group 4: Bond Market Leverage and Funding 4.1 Leverage Ratio - The leverage ratio dropped to 107.22%. From August 11 to 15, it first increased and then decreased [20] 4.2 Repurchase Transactions - The average daily trading volume of pledged repurchase this week was 8.2 trillion yuan, with an average overnight proportion of 89.82%. The overnight trading volume increased by 0.03 trillion yuan month - on - month, and the overnight proportion decreased by 0.05pct [26][30] 4.3 Funding - Banks' fund lending first increased and then decreased. Big banks and policy banks' net lending on August 15 was 4.83 trillion yuan. The main fund borrowers were funds. DR007 fluctuated upward, and R007 continued to rise [32] Group 5: Duration of Medium - and Long - Term Bond Funds 5.1 Median Duration - The median duration of medium - and long - term bond funds remained at 2.81 years (de - leveraged) and 3.11 years (leveraged). On August 15, the de - leveraged median duration changed less than 0.01 year, and the leveraged median duration decreased by 0.02 years [44] 5.2 Duration by Bond - Fund Type - The median duration of interest - rate bond funds (leveraged) rose to 3.94 years, an increase of 0.02 years from last Friday. The median duration of credit - bond funds (leveraged) dropped to 2.86 years, a decrease of 0.03 years from last Friday [47] Group 6: Category Strategy Comparison 6.1 Sino - US Spread - The Sino - US treasury bond spreads generally widened. The 1Y spread widened by 2bp, 2Y by about 1bp, 3Y narrowed by 4bp, 5Y widened by about 3bp, 7Y widened by 1bp, 10Y changed less than 1bp, and 30Y widened by 2bp [52] 6.2 Implied Tax Rate - The implied tax rate generally widened. As of August 15, the 1Y spread between China Development Bank bonds and treasury bonds widened by about 2bp, 3Y by 5bp, 5Y by 3bp, 7Y by about 3bp, 10Y by 2bp, 15Y narrowed by 1bp, and 30Y changed less than 1bp [53] Group 7: Bond Lending Balance Changes - On August 15, the lending concentration of active 10Y treasury bonds and active 10Y China Development Bank bonds increased, while that of less - active 10Y treasury bonds, less - active 10Y China Development Bank bonds, and active 30Y treasury bonds decreased. By institution, the lending concentration of securities firms and other institutions increased, while that of big banks and small - and medium - sized banks decreased [54]