债市机构行为周报（8月第4周）：近期机构行为的三个变化-20250831

Report Industry Investment Rating No relevant content provided. Core Viewpoints - The sentiment of non - banking institutions is not pessimistic, but the number of bond - receiving institutions during bond market corrections is gradually decreasing. The bond market fluctuated this week, with the yields of 10 - year and 30 - year treasury bonds rising in the valuation curve. The spread between 250210 and 250215 has widened by about 2bp [2][11]. - There are three changes in institutional behavior this week: frequent bond market corrections but strong buying power; on Thursday, funds were the main sellers, but the net selling volume was not large, and the lack of counterparties led to a significant interest rate increase; attention should be paid to the possible spread compression of the ultra - long bond 25 Special 06 [3][4]. Summaries According to the Directory 1. This Week's Institutional Behavior Review - Yield Curve: Treasury bond yields declined at the short end and rose at the long end. For example, the 10Y yield rose 6bp, and the 30Y yield rose 6bp. The short - end yields of CDB bonds declined, with the 1Y yield down about 4bp [14]. - Term Spread: The interest rate spreads of treasury bonds and CDB bonds showed differentiated trends, with the short - end spreads widening. For treasury bonds, the 1Y - DR001 spread rose about 14bp, and the 5Y - 3Y spread widened 3bp. For CDB bonds, the 1Y - DR001 spread rose about 6bp, and the 3Y - 1Y spread widened 3bp [16][17]. 2. Bond Market Leverage and Funding Situation - Leverage Ratio: It decreased to 106.84%. From August 25th to August 29th, the leverage ratio first increased and then decreased during the week [20]. - Average Daily Repo Turnover: From August 25th to August 29th, the average daily turnover of pledged repurchase was about 7.1 trillion yuan, a decrease of 0.06 trillion yuan from last week. The average daily turnover of overnight pledged repurchase was 6.0 trillion yuan, a decrease of 0.23 trillion yuan month - on - month. The average overnight trading ratio was 85.46%, a decrease of 2.29pct month - on - month [27][28]. - Funding Situation: Bank funding supply first increased and then decreased. On August 29th, the net funding supply of large - scale and policy banks was 4.015 trillion yuan; the average daily net funding inflow of joint - stock banks, city commercial banks, and rural commercial banks was 0.58 trillion yuan, and the net inflow on August 29th was 0.81 trillion yuan. The main funding inflow party was funds, and the funding supply of money market funds fluctuated and increased [31]. 3. Duration of Medium - and Long - Term Bond Funds - Median Duration: The median duration of medium - and long - term bond funds decreased to 2.77 years (de - leveraged) and 2.95 years (leveraged). On August 29th, the median duration (de - leveraged) decreased by 0.04 years compared to last Friday, and the median duration (leveraged) decreased by 0.16 years [43]. - Duration by Bond Fund Type: The median duration (leveraged) of interest - rate bond funds decreased to 3.75 years, a decrease of 0.16 years compared to last Friday; the median duration (leveraged) of credit bond funds decreased to 2.72 years, a decrease of 0.12 years compared to last Friday [46]. 4. Comparison of Category Strategies - China - US Yield Spread: The overall spread widened. The 1Y spread widened by 10bp, the 2Y spread widened by 14bp, and so on. From a percentile perspective, the 1Y spread rose to the 47% percentile [51]. - Implied Tax Rate: The short - end was differentiated, and the long - end narrowed. As of August 29th, the 1Y spread between CDB bonds and treasury bonds narrowed by 3bp, and the 10Y spread narrowed by 6bp [52]. 5. Changes in Bond Lending Balances On August 29th, the lending concentration of the active 10 - year treasury bond, the second - active 10 - year treasury bond, the active 10 - year CDB bond, and the active 30 - year treasury bond increased, while the lending concentration of the second - active 10 - year CDB bond decreased. By institution, the lending concentration of large - scale banks and other institutions increased, while that of small - and medium - sized banks and securities companies decreased [53].