2025 年 11 月 22 日 中长期债基久期上升，机构杠杆率 多数上行 ——机构行为观察周报 20251121 相关研究 证券分析师 黄伟平 A0230524110002 huangwp@swsresearch.com 栾强 A0230524110003 luanqiang@swsresearch.com 王哲一 A0230525100003 wangzy@swsresearch.com 联系人 债 券 研 究 请务必仔细阅读正文之后的各项信息披露与声明 本研究报告仅通过邮件提供给 中庚基金 使用。1 债 券 策 略 证 王哲一 A0230525100003 wangzy@swsresearch.com 券 研 究 报 告 - ⚫ 基于现券买卖数据测算结果，本周四较上周五全部债券基金久期中枢周度环比抬升 0.03 年至 3.31 年。 ⚫ 基于计量模型测算结果，本周中长期纯债基金久期（不含杠杆）中位数上升，标准差增加。 截至 20251121，全部中长期纯债基金久期中位数 5DMA 达到 2.58 年，周度环比上升 0.08 年，处于近三年以来 80.40%分位数，久期标准差 5DMA 为 2.04，周度 ...

Group 1: Report Industry Investment Rating - No industry investment rating information is provided in the report. Group 2: Core Viewpoints of the Report - In October, the total bond custody scale increased by 131.24 billion yuan month - on - month, ending the two - month trend of less growth. The rebound of inter - bank certificate of deposit custody scale was the main driving force, while the custody increment of interest - rate bonds declined significantly [3][6]. - The bond market performance eased in October. Long - term interest rates showed a recovery trend, and dropped significantly after the central bank announced the restart of treasury bond trading on the 27th. Trading desks' enthusiasm for bond buying increased significantly, while the allocation willingness of allocation - type institutions declined [3][10]. - Due to the increase in institutions' borrowed funds, the bond market leverage ratio increased slightly by 0.1 pct to 107.4% in October, remaining at a relatively low level. Non - bank institutions' leverage ratio increased, but the absolute level was still not high [3][37]. Group 3: Summary by Directory 10 - month Bond Custody Increment Rebounds, and Inter - bank Certificate of Deposit Net Financing is the Main Support - The total bond custody scale increased by 131.24 billion yuan month - on - month in October, with the inter - bank certificate of deposit custody scale turning from decline to increase for the first time since June this year. The net financing scale of short - term commercial paper and medium - term notes increased, while the custody increment of interest - rate bonds decreased significantly [3][6]. - For interest - rate bonds, the custody increment of treasury bonds, local bonds, and policy - bank bonds all decreased compared with the previous month. For credit bonds, the custody increment of short - term commercial paper and medium - term notes increased, while that of enterprise bonds and PPN continued to decline [6]. The Central Bank Restarts Bond Buying, Market Sentiment Improves, and the Willingness of Trading Desks to Increase Bond Holdings is Significantly Restored - In October, the bond market performance eased. After the central bank announced the restart of treasury bond trading, long - term interest rates dropped significantly. The trading desks' enthusiasm for bond buying increased, while the allocation willingness of commercial banks and insurance companies declined [10]. - **General Funds**: The bond custody scale increased by 104.45 billion yuan month - on - month, turning to increase holdings of inter - bank certificates of deposit, medium - term notes, and short - term commercial paper, and reducing the scale of selling financial bonds [15]. - **Securities Companies**: The bond custody volume increased by 134.8 billion yuan month - on - month, reaching a new high since July 2024, mainly due to a large increase in holdings of treasury bonds and policy - bank bonds [17][19]. - **Insurance Companies**: The bond custody volume decreased by 450 million yuan month - on - month, mainly due to the reduction of holdings of treasury bonds and inter - bank certificates of deposit [22]. - **Overseas Institutions**: The bond custody scale decreased by 5.42 billion yuan month - on - month, with an increased scale of selling domestic bonds, but turning to increase holdings of treasury bonds and reduce holdings of policy - bank bonds [24][25]. - **Other Institutions**: The bond custody volume increased by 35.56 billion yuan month - on - month, with an increase in holdings of treasury bonds and certificates of deposit, and a decrease in holdings of policy - bank bonds [27]. - **Commercial Banks**: The bond custody scale decreased by 25.14 billion yuan month - on - month, mainly due to a significant decrease in the scale of increasing holdings of treasury bonds and an increase in the scale of reducing holdings of local bonds [30]. - **Credit Unions**: The bond custody scale decreased by 206 million yuan month - on - month, mainly due to the reduction of holdings of treasury bonds and policy - bank bonds [34]. In October, the Non - bank Leverage Ratio Increased Beyond Seasonality, but the Absolute Level was Still Not High - In October, the bond market leverage ratio increased by 0.1 pct to 107.4% month - on - month, remaining at a relatively low level. The non - bank institutions' leverage ratio increased by 0.3 pct to 117.2%, but the absolute level was still not high in the past three - year dimension [37]. - Among them, the securities companies' leverage ratio decreased by 3.3 pct to 219.9%, while the leverage ratio of insurance and non - legal person products increased by 0.3 pct to 114.0% [37].

Report Industry Investment Rating No relevant content provided. Core Viewpoints - In the second half of 2025, the economic growth rate may not decline significantly as it has entered the horizontal part of the second L - shape [7]. - Structural issues such as prices are expected to improve trend - wise [7]. - There will be a continuous switch in stock - bond allocation, with bond yields and the stock market expected to rise [7]. Summary by Related Catalogs Overall - In October, the total bond custody volume of Shanghai Clearing House and China Central Depository & Clearing (CCDC) was 176.77 trillion yuan, with a monthly net increase of 1312.36 billion yuan, and the month - on - month increase rebounded. The bond custody volume of Shanghai Clearing House was 49.70 trillion yuan, with a monthly net increase of 1042.742 billion yuan, and the month - on - month increase rebounded significantly. The bond custody volume of CCDC was 127.07 trillion yuan, with a monthly net increase of 269.618 billion yuan, and the month - on - month increase decreased for two consecutive months [3]. 1. By Bond Type - Overall, inter - bank certificates of deposit contributed the main increment in October. The custody volume of interest - rate bonds was 120.97 trillion yuan, with a monthly net increase of 518.424 billion yuan; the custody volume of credit bonds was 33.39 trillion yuan, with a monthly net increase of 289.42 billion yuan; the custody volume of inter - bank certificates of deposit was 20.70 trillion yuan, with a monthly net increase of 721.41 billion yuan [4]. - At Shanghai Clearing House, inter - bank certificates of deposit contributed the main increment, with a monthly net increase of 721.41 billion yuan; corporate credit - type bonds had a monthly net increase of 146.878 billion yuan; interest - rate bonds had a monthly net increase of 655.00 billion yuan [3]. - At CCDC, local government bonds contributed the main increment, with a monthly net increase of 2618.95 billion yuan; interest - rate bonds had a monthly net increase of 4529.24 billion yuan; credit bonds had a monthly net increase of - 1833.05 billion yuan [3]. 2. By Institution - Overall, broad - based funds were the main buyers of bonds. The custody volume of commercial banks was 93.36 trillion yuan, with a monthly net increase of - 2544.08 billion yuan; the custody volume of securities firms was 3.30 trillion yuan, with a monthly net increase of 1347.83 billion yuan; the custody volume of broad - based funds was 48.74 trillion yuan, with a monthly net increase of 10445.07 billion yuan; the custody volume of overseas institutions was 3.73 trillion yuan, with a monthly net increase of - 541.97 billion yuan [5]. - At Shanghai Clearing House, policy banks and broad - based funds increased their bond holdings, with monthly net increases of 634.60 billion yuan and 10179.59 billion yuan respectively. The monthly net increases of custody volumes of deposit - taking financial institutions, insurance companies, securities firms, and overseas institutions were negative, at - 112.55 billion yuan, - 27.45 billion yuan, - 109.77 billion yuan, and - 763.67 billion yuan respectively [5]. - At CCDC, securities firms were the main buyers of bonds, with a monthly net increase of 1457.59 billion yuan. The monthly net increases of custody volumes of commercial banks, credit unions, and insurance companies were negative, at - 2351.82 billion yuan, - 255.68 billion yuan, and - 17.07 billion yuan respectively [5]. Leverage - In October, the overall leverage ratio of the bond market was 106.90%, remaining flat month - on - month. By institution, the leverage ratios of commercial banks and securities firms increased. The leverage ratio of commercial banks was 104.61%, up 0.22 percentage points month - on - month; the leverage ratio of non - bank institutions was 109.61%, down 0.35 percentage points month - on - month, and the leverage ratio of securities firms was 142.36%, up 1.08 percentage points month - on - month [6].

1. Report Industry Investment Rating No information provided in the content. 2. Core View of the Report - In September, the total bond custody scale increased by 921.2 billion yuan month - on - month, with a slower growth compared to August, hitting the lowest level since May last year. The adjustment in the bond market was affected by the change in public - offering regulatory policies, but market sentiment towards government bonds has recovered. The bond market leverage ratio decreased month - on - month, not showing the seasonal increase seen in previous quarter - end months [2]. 3. Summary According to the Directory 3.1 9 - month Bond Custody Increment Shrinks Significantly, Net Financing of Policy Financial Bonds Drops Notably - The total bond custody scale increased by 921.2 billion yuan month - on - month in September, 584.8 billion yuan less than in August. Among them, the custody increment of policy financial bonds decreased significantly, while that of treasury bonds and local bonds decreased slightly. The custody scale of inter - bank certificates of deposit and commercial bank bonds continued to decline with an enlarged decline, and the custody increment of credit bonds increased slightly [2][5]. 3.2 Public - offering Regulatory New Rules Bring Structural Shocks, Demand for Government Bonds has Recovered - Affected by the public - offering regulatory policy changes in September, the bond market adjusted, especially for bonds with large public - offering holdings. The adjustment was mainly due to panic rather than liquidity pressure. Market sentiment recovered at the end of the month. Structurally, different institutions had different behaviors. Generalized funds reduced their holdings of credit and financial bonds, while securities firms increased their holdings. Both reduced their holdings of policy financial bonds and increased their holdings of local bonds. Commercial banks' increase in holdings decreased, while insurance institutions significantly increased their holdings of treasury bonds, and the reduction in holdings by overseas institutions decreased [2][9]. - **Generalized Funds**: The decline in the bond custody scale of generalized funds widened by 5.99 billion yuan month - on - month to 25.15 billion yuan. They reduced their holdings of more credit and financial bonds, and their relative reduction in bond allocation decreased, turning to increase the allocation of inter - bank certificates of deposit [14]. - **Securities Firms**: The bond custody volume of securities firms decreased by 353 million yuan month - on - month. They mainly reduced their holdings of policy financial bonds and increased their holdings of local bonds and medium - term notes. Their relative reduction in bond allocation increased slightly [18]. - **Insurance Companies**: The bond custody increment of insurance companies increased by 43 million yuan month - on - month to 439 million yuan. They significantly increased their holdings of treasury bonds and increased their allocation of bonds relatively [20]. - **Overseas Institutions**: The decline in the bond custody volume of overseas institutions narrowed by 551 million yuan month - on - month to 446 million yuan. They turned to increase their holdings of policy financial bonds, and their relative reduction in bond allocation decreased [24]. - **Other Institutions**: The bond custody increment of other institutions increased by 203 million yuan month - on - month to 3556 million yuan. They increased their holdings of local bonds and medium - term notes, and increased their allocation of bonds relatively [27]. - **Commercial Banks**: The bond custody increment of commercial banks decreased by 6056 million yuan month - on - month to 5945 million yuan. They mainly reduced their holdings of policy financial bonds and treasury bonds, and their relative increase in bond allocation decreased [32]. - **Credit Unions**: The bond custody increment of credit unions increased by 315 million yuan month - on - month to 419 million yuan. They increased their holdings of treasury bonds and policy financial bonds and increased their allocation of bonds relatively [38]. 3.3 The Bond Market Leverage Ratio Declined Counter - seasonally in September, and the Leverage Ratio of Generalized Funds Continued to Decline - Affected by the decline in the repurchase balance, the bond market leverage ratio decreased by 0.2 pct month - on - month to 107.3% in September, remaining at a relatively low level. The leverage ratio of commercial banks decreased by 0.2 pct to 103.6%, while that of non - bank institutions remained unchanged at 116.9%. Among them, the leverage ratio of securities companies increased by 8.2 pct to 223.3%, and that of insurance and non - legal person products decreased by 0.1 pct to 113.7% [40].

1. Report Industry Investment Rating No information about the report industry investment rating is provided in the given content. 2. Core Viewpoints of the Report - The total bond custody volume increased less month - on - month. As of the end of September 2025, the total bond custody volume of CCDC and SHCH was 175.46 trillion yuan, with a net monthly increase of 0.92 trillion yuan, 0.58 trillion yuan less than the month - on - month increase at the end of August [1][11]. - The custody volume of interest - rate bonds and credit bonds increased net month - on - month, while that of financial bonds and inter - bank certificates of deposit (NCDs) decreased net month - on - month [1][11]. - This month, the total custody volume of major bonds of allocation accounts continued to increase month - on - month, while that of trading accounts and overseas institutions continued to decrease month - on - month [2][27]. - The balance of bonds to be repurchased increased seasonally, and the bond market leverage ratio rose month - on - month. As of the end of September 2025, the estimated balance of repurchase - style repo was 11.33 trillion yuan, a month - on - month increase of 99.39 billion yuan, and the leverage ratio was 106.90%, a month - on - month increase of 0.03 percentage points and a year - on - year decrease of 1.05 percentage points [4][53]. 3. Summary According to Relevant Catalogs 3.1 Bond Custody Volume and Structure - As of the end of September 2025, the total bond custody volume of CCDC and SHCH was 175.46 trillion yuan, with a net monthly increase of 0.92 trillion yuan, 0.58 trillion yuan less than the month - on - month increase at the end of August [1][11]. - In September 2025, the interest - rate bond custody volume was 122.01 trillion yuan, accounting for 69.54% of the inter - bank bond market custody volume, with a net monthly increase of 1.29 trillion yuan; the credit bond custody volume was 18.74 trillion yuan, accounting for 10.68%, with a net monthly increase of 5.0986 billion yuan; the non - policy financial bond custody volume was 12.76 trillion yuan, accounting for 7.27%, with a net monthly decrease of 4.823 billion yuan; the NCD custody volume was 19.97 trillion yuan, accounting for 11.38%, with a net monthly decrease of 0.41 trillion yuan [1][11]. 3.2 Bond Holder Structure and Changes 3.2.1 Changes in Custody Volume by Institution Month - on - Month - Policy banks and commercial banks increased their holdings of interest - rate bonds and credit bonds and reduced their holdings of NCDs [2][27]. - Insurance institutions increased their holdings of interest - rate bonds, NCDs, and credit bonds across the board [2][27]. - Securities companies increased their holdings of credit bonds and reduced their holdings of interest - rate bonds and NCDs [2][27]. - Credit unions, non - legal entity products, and overseas institutions increased their holdings of interest - rate bonds and reduced their holdings of NCDs and credit bonds [2][27]. 3.2.2 Changes in Custody Volume by Bond Type Month - on - Month - The custody volume of treasury bonds continued to increase month - on - month. Commercial banks continued to significantly increase their holdings, while policy banks continued to reduce their holdings [3][29]. - The custody volume of local government bonds continued to increase month - on - month. Except for commercial banks reducing their holdings, other major institutions increased their holdings [3][29]. - The custody volume of policy - financial bonds continued to increase month - on - month. Commercial banks continued to increase their holdings, while securities companies and non - legal entity products changed to reducing their holdings [3][29]. - The custody volume of NCDs continued to decrease month - on - month. Except for insurance institutions increasing their holdings, other major institutions reduced their holdings [3][29]. - The custody volume of enterprise bonds continued to decrease month - on - month. Commercial banks and non - legal entity products were the main entities reducing their holdings [3][30]. - The custody volume of medium - term notes continued to increase month - on - month. Commercial banks continued to significantly increase their holdings, while non - legal entity products changed to reducing their holdings [3][31]. - The custody volume of short - term financing bills and super - short - term financing bills continued to decrease month - on - month. Non - legal entity products were the main entity reducing their holdings [3][31]. - The custody volume of non - publicly - oriented debt instruments continued to decrease month - on - month. Non - legal entity products were the main entity reducing their holdings [3][31]. 3.2.3 Holder Structure of Major Bond Types - As of the end of September 2025, for treasury bonds, commercial banks held 69.91%, overseas institutions held 5.41%, policy banks held 10.29%, etc. [34]. - For policy - financial bonds, commercial banks held 55.25%, non - legal entity products held 31.66%, overseas institutions held 2.95%, etc. [36]. - For local government bonds, commercial banks held 73.38%, non - legal entity products held 9.50%, policy banks held 10.66%, etc. [39]. - For enterprise bonds, non - legal entity products held 54.98%, commercial banks held 32.02%, securities companies held 9.02%, etc. [41]. - For medium - term notes, non - legal entity products held 60.71%, commercial banks held 24.15%, securities companies held 4.88%, etc. [43]. - For short - term financing bills and super - short - term financing bills, non - legal entity products held 63.46%, commercial banks held 29.83%, etc. [46]. - For non - publicly - oriented debt instruments, non - legal entity products held 62.06%, commercial banks held 20.31%, etc. [49]. - For NCDs, non - legal entity products held 60.68%, commercial banks held 23.57%, etc. [51]. 3.3 Bond Market Leverage Ratio Observation - As of the end of September 2025, the estimated balance of repurchase - style repo was 11.33 trillion yuan, a month - on - month increase of 99.39 billion yuan. The leverage ratio was 106.90%, a month - on - month increase of 0.03 percentage points and a year - on - year decrease of 1.05 percentage points [4][53].

1. Report Industry Investment Rating No relevant content provided. 2. Core Viewpoints of the Report - In the second half of 2025, the economic growth rate may not decline significantly, and structural issues such as prices are expected to improve trend - wise [7]. - The allocation between stocks and bonds continues to shift, with bond yields and the stock market expected to rise continuously [7]. 3. Summaries Based on Relevant Catalogs 3.1 Overall Situation - The combined bond custody volume of Shanghai Clearing House and China Central Depository & Clearing Co., Ltd. (CCDC) increased less month - on - month in September. The combined custody volume was 175.46 trillion yuan, with a net monthly increase of 92.1157 billion yuan, a decrease in the month - on - month increase [3]. - The bond custody volume of Shanghai Clearing House was 48.66 trillion yuan, with a net monthly increase of 3.2441 billion yuan, a rebound in the month - on - month increase [3]. - The bond custody volume of CCDC was 126.80 trillion yuan, with a net monthly increase of 88.8716 billion yuan, a decrease in the month - on - month increase [3]. 3.2 By Bond Type - Interest - rate bonds contributed the main increment this month. The custody volume of interest - rate bonds was 120.45 trillion yuan, with a net monthly increase of 132.9742 billion yuan; the custody volume of credit bonds was 33.36 trillion yuan, with a net monthly increase of - 4.4188 billion yuan; the custody volume of inter - bank certificates of deposit was 19.97 trillion yuan, with a net monthly increase of - 40.7479 billion yuan [4]. - At Shanghai Clearing House, financial bonds (excluding policy - bank financial bonds) contributed the main increment, with a net monthly increase of 26.6 billion yuan; company credit - type bonds had a net monthly increase of 7.7706 billion yuan; interest - rate bonds had a net monthly increase of 6.8 billion yuan; inter - bank certificates of deposit had a net monthly increase of - 40.7479 billion yuan [4]. - At CCDC, treasury bonds contributed the main increment, with a net monthly increase of 76.1256 billion yuan; interest - rate bonds had a net monthly increase of 126.1742 billion yuan; credit bonds had a net monthly increase of - 37.3026 billion yuan [4]. 3.3 By Institution - Commercial banks were the main force in increasing bond holdings. The custody volume of commercial banks was 93.62 trillion yuan, with a net monthly increase of 60.6672 billion yuan [5]. - At Shanghai Clearing House, deposit - taking financial institutions, insurance companies, and securities institutions increased their bond holdings, with net monthly increases of 9.9437 billion yuan, 1.9957 billion yuan, and 0.3561 billion yuan respectively; policy - bank financial institutions, broad - based funds, and overseas institutions had negative net monthly increases in custody volume, which were - 6.6401 billion yuan, - 6.0279 billion yuan, and - 5.5686 billion yuan respectively [5]. - At CCDC, commercial banks were the main contributor to the increment, with a net monthly increase of 48.1213 billion yuan; securities and broad - based funds had negative net monthly increases in custody volume, which were - 3.8856 billion yuan and - 19.1230 billion yuan respectively [5]. 3.4 Leverage - The overall leverage ratio of the bond market increased slightly. In September, the overall leverage ratio of the bond market was 106.90% (previous value: 106.88%), a month - on - month increase of 0.03 percentage points [6]. - By institution, the leverage ratio of commercial banks was 104.40% (previous value: 104.58%), a month - on - month decrease of 0.18 percentage points; the leverage ratio of non - bank institutions was 109.96% (previous value: 109.66%), a month - on - month increase of 0.29 percentage points, among which the leverage ratio of securities companies was 141.28% (previous value: 138.54%), a month - on - month increase of 2.74 percentage points [6].

Group 1 - The total amount of bonds under custody has slightly increased, reaching 174.54 trillion yuan as of the end of August 2025, with a net increase of 1.51 trillion yuan compared to the previous month [6] - The structure of bond custody shows an increase in interest rate bonds and financial bonds, while credit bonds and interbank certificates of deposit have decreased [6] - Interest rate bonds account for 68.72% of the total custody, with a net increase of 1.80 trillion yuan, while credit bonds decreased by 14.24 billion yuan [6] Group 2 - The configuration of bondholders indicates that policy banks continue to increase their holdings in interest rate bonds, interbank certificates of deposit, and credit bonds, while commercial banks and credit cooperatives have increased interest rate bonds and credit bonds but reduced interbank certificates of deposit [7] - The custody of government bonds has continued to increase, with commercial banks significantly increasing their holdings, while non-legal entities have reduced their holdings [7] - The custody of corporate bonds has decreased, with major institutions showing a trend of reduction [7] Group 3 - The leverage ratio in the bond market has decreased, with the estimated balance of repurchase agreements at 11.23 trillion yuan, reflecting a leverage ratio of 106.88%, which is a slight increase from the previous month but a decrease year-on-year [8]

Group 1: Report Summary - The total bond custody scale in August increased by 150.6 billion yuan month-on-month, with a slower growth compared to July. The custody increments of treasury bonds and policy financial bonds rose, while the net financing scale of local bonds and credit bonds declined, and commercial bank bonds turned into net repayment. The custody scale of interbank certificates of deposit continued to decline significantly [4][7]. - In early August, the bond market oscillated and recovered, but after mid - August, sentiment weakened due to the continuous new highs of A - shares. Long - term interest rates were under pressure, while short - term rates were relatively resilient. From the perspective of institutional behavior, broad - based funds may have been affected by liability - side disturbances and reduced their bond holdings for the first time since February. Dealers also increased their holdings of interest - rate bonds. However, the承接 power of allocation - oriented investors was insufficient, which might have prevented interest rates from stabilizing in August. Notably, foreign institutions significantly narrowed their reduction of domestic bond holdings, possibly indicating an increase in their overall allocation of Chinese assets [4][9]. - Affected by the decline in the balance of repurchase agreements, the bond market leverage ratio slightly decreased by 0.1 percentage points to 107.5% in August, remaining at a relatively low level in recent years. Among different institutions, commercial banks' leverage ratio increased by 0.2 percentage points to 103.8%, while non - bank institutions' leverage ratio decreased by 0.5 percentage points to 116.9% [4][39]. Group 2: August Bond Custody Increment Analysis - Interest - rate bonds: The issuance scale of treasury bonds increased while the maturity scale decreased in August, with the custody increment rising by 38.42 billion yuan to 82.61 billion yuan. For policy financial bonds, the decline in the issuance scale was smaller than that in the maturity scale, and the custody increment increased by 22.23 billion yuan to 46.16 billion yuan. The issuance scale of local bonds decreased significantly while the maturity scale increased, and the custody increment decreased by 31.51 billion yuan to 51.72 billion yuan [7]. - Credit bonds: The issuance scale of medium - term notes and enterprise bonds decreased while the maturity scale increased. The custody increment of medium - term notes decreased by 11.05 billion yuan to 10.44 billion yuan, and the custody scale of enterprise bonds decreased by 3.53 billion yuan. The issuance scale of short - term commercial paper decreased, and the custody volume changed from an increase of 1.06 billion yuan in the previous month to a decrease of 4.61 billion yuan. The custody scale of PPN continued to decline by 1.53 billion yuan, with a narrower decline compared to the previous month [7]. - Other bonds: The issuance and maturity scales of interbank certificates of deposit both increased slightly, and the custody scale continued to decline by 35.56 billion yuan, with a narrower decline compared to the previous month. Commercial bank bonds turned into net repayment, with the custody volume changing from an increase of 36.9 billion yuan in the previous month to a decrease of 1.64 billion yuan. The custody increment of non - bank bonds increased by 2.04 billion yuan to 5.12 billion yuan, and the decline in the custody scale of credit - asset - backed securities narrowed by 0.58 billion yuan to 0.54 billion yuan [7]. Group 3: Institutional Behavior Analysis 3.1 Broad - based Funds - The bond custody scale of broad - based funds decreased by 19.17 billion yuan in August, mainly due to significant reductions in credit bonds and certificates of deposit, while slightly increasing holdings of interest - rate bonds. The reduction in holdings of interbank certificates of deposit, commercial bank bonds, and enterprise bonds increased, while the increase in holdings of medium - term notes and financial bonds on the Clearstream decreased. They turned to reduce holdings of short - term commercial paper and increase holdings of policy financial bonds [12]. 3.2 Securities Companies - The bond custody volume of securities companies increased by 190 million yuan in August, mainly due to a significant decrease in the reduction of treasury bonds, a slight decrease in the reduction of medium - term notes, an increase in the increase of policy financial bonds, and a turn to slightly increase holdings of financial bonds on the Clearstream. The reduction of bond holdings weakened significantly [18]. 3.3 Insurance Companies - The bond custody increment of insurance companies decreased by 5.76 billion yuan to 3.96 billion yuan in August, mainly due to a decrease in the increase of local bonds and treasury bonds, a turn to reduce holdings of policy financial bonds and medium - term notes, and an increase in the reduction of commercial bank bonds. They turned to reduce bond holdings [20]. 3.4 Foreign Institutions - The decline in the bond custody volume of foreign institutions significantly narrowed by 20.41 billion yuan to 9.97 billion yuan in August, with a significant decrease in the reduction of interbank certificates of deposit, treasury bonds, and policy financial bonds. They generally continued to reduce bond holdings, but the reduction intensity weakened [25]. 3.5 Other Institutions - The bond custody increment of other institutions, including the central bank, increased by 9.58 billion yuan to 33.52 billion yuan in August, mainly due to the increase in the net investment of outright reverse repurchase. They significantly increased holdings of local bonds, turned to reduce holdings of policy financial bonds, and slightly increased the reduction of treasury bonds. The increase in holdings of interbank certificates of deposit reached a new high since December 2022, while the increase in holdings of medium - term notes declined from a historical high [28]. 3.6 Commercial Banks - The bond custody increment of commercial banks decreased by 52.2 billion yuan to 120.01 billion yuan in August. They turned to reduce holdings of local bonds, possibly affected by the increase in the net investment of outright reverse repurchase and the concentration on local bonds. The increase in holdings of treasury bonds and policy financial bonds increased significantly, while the increase in holdings of financial bonds on the Clearstream decreased significantly [31]. 3.7 Credit Unions - The bond custody increment of credit unions decreased by 5.92 billion yuan to 1.04 billion yuan in August, mainly due to a decrease in the increase of policy financial bonds and treasury bonds and a turn to reduce holdings of interbank certificates of deposit. They turned to reduce bond holdings [37]. Group 4: Bond Market Leverage Ratio Analysis - The bond market leverage ratio decreased by 0.1 percentage points to 107.5% in August, remaining at a relatively low level in recent years. Commercial banks' leverage ratio increased by 0.2 percentage points to 103.8%, still significantly lower than the level before April 2024. Non - bank institutions' leverage ratio decreased by 0.5 percentage points to 116.9%, remaining at a relatively low level since 2022. Among non - bank institutions, securities companies' leverage ratio decreased by 12.8 percentage points to 215.1%, still at a relatively high level in the past three years. The leverage ratio of insurance and non - legal person products decreased by 0.4 percentage points to 113.8%, remaining at a relatively low level since 2022 [39].

1. Report Industry Investment Rating No information provided in the content. 2. Core View of the Report The report analyzes the bond custody data for August 2025, showing that the total bond custody increased less month - on - month. The custody of interest - rate bonds and financial bonds increased, while that of credit bonds and inter - bank certificates of deposit decreased. The custody of major bond types by different institutions showed a differentiated pattern, with allocators increasing and traders and overseas institutions decreasing. The bond market leverage ratio increased month - on - month but decreased year - on - year [1][2][50]. 3. Summary by Relevant Catalogs 3.1 Bond Custody Total and Structure - The total bond custody increased less month - on - month. As of the end of August 2025, the total bond custody of CCDC and SHCH was 174.54 trillion yuan, with a net increase of 1.51 trillion yuan month - on - month, 0.24 trillion yuan less than the increase at the end of July [1][11]. - The custody of interest - rate bonds and financial bonds increased, while that of credit bonds and inter - bank certificates of deposit decreased. In August 2025, the interest - rate bond custody was 120.72 trillion yuan, accounting for 68.72% of the inter - bank bond market custody, with a net increase of 1.80 trillion yuan; the credit bond custody was 18.69 trillion yuan, accounting for 10.80%, with a net decrease of 1424 million yuan; the non - policy financial bond custody was 12.81 trillion yuan, accounting for 7.39%, with a net increase of 2.875 billion yuan; the inter - bank certificate of deposit custody was 20.38 trillion yuan, accounting for 11.99%, with a net decrease of 0.36 trillion yuan [1][11]. 3.2 Bond Holder Structure and Changes 3.2.1 Month - on - Month Changes in Custody by Institution - Allocators' custody of major bond types continued to increase month - on - month, while traders and overseas institutions' custody continued to decrease. Policy banks continued to increase their holdings of interest - rate bonds, inter - bank certificates of deposit, and credit bonds; commercial banks and credit unions increased their holdings of interest - rate bonds and credit bonds but decreased their holdings of inter - bank certificates of deposit; insurance institutions, securities companies, and non - legal entity products increased their holdings of interest - rate bonds but decreased their holdings of inter - bank certificates of deposit and credit bonds; overseas institutions continued to reduce their holdings of interest - rate bonds, inter - bank certificates of deposit, and credit bonds [2][27]. 3.2.2 Month - on - Month Changes in Custody by Bond Type - Treasury bond custody continued to increase month - on - month. Commercial banks continued to significantly increase their holdings, while non - legal entity products continued to reduce their holdings. - Local government bond custody continued to increase month - on - month. Policy banks continued to increase their holdings, while commercial banks changed from increasing to reducing their holdings. - Policy financial bond custody continued to increase month - on - month. Commercial banks continued to increase their holdings, while policy banks changed from increasing to reducing their holdings. - Inter - bank certificate of deposit custody continued to decrease month - on - month. Except for policy banks increasing their holdings, other major institutions reduced their holdings. - Enterprise bond custody continued to decrease month - on - month, and major institutions all reduced their holdings. - Medium - term note custody continued to increase month - on - month. Commercial banks continued to significantly increase their holdings, while securities companies continued to reduce their holdings. - Short - term financing and super - short - term financing custody changed to a decrease, with commercial banks being the main reducing entity. - Non - publicly - oriented debt instrument custody continued to decrease month - on - month, with non - legal entity products being the main reducing entity [3][29][30]. 3.2.3 Holder Structure of Major Bond Types - As of the end of August 2025, the holder structure of treasury bonds: commercial banks accounted for 69.23%, overseas institutions 5.53%, policy banks 10.77%, non - legal entity products 8.13%, securities companies 2.63%, insurance institutions 2.55%, and credit unions 1.16% [34]. - The holder structure of policy financial bonds: commercial banks accounted for 55.07%, non - legal entity products 31.86%, overseas institutions 2.87%, credit unions 3.30%, insurance institutions 2.04%, securities companies 1.13%, and policy banks 3.74% [36]. - The holder structure of local government bonds: commercial banks accounted for 74.22%, non - legal entity products 9.42%, policy banks 9.98%, insurance institutions 4.89%, securities companies 0.93%, credit unions 0.54%, and overseas institutions 0.02% [38]. - The holder structure of enterprise bonds: non - legal entity products accounted for 54.74%, commercial banks 32.20%, securities companies 9.12%, insurance institutions 3.02%, policy banks 0.56%, credit unions 0.28%, and overseas institutions 0.08% [40]. - The holder structure of medium - term notes: non - legal entity products accounted for 61.57%, commercial banks 23.62%, securities companies 4.88%, nominal holder accounts (domestic) 3.40%, policy banks 3.14%, insurance institutions 2.35%, overseas institutions 0.22%, others 0.55%, and credit unions 0.27% [42]. - The holder structure of short - term financing and super - short - term financing: non - legal entity products accounted for 62.19%, commercial banks 20.57%, nominal holder accounts (domestic) 7.53%, policy banks 5.01%, securities companies 4.20%, others 0.28%, credit unions 0.17%, overseas institutions 0.05%, and insurance institutions 0.00% [45]. - The holder structure of non - publicly - oriented debt instruments: non - legal entity products accounted for 59.93%, commercial banks 23.84%, policy banks 2.30%, credit unions 2.15%, others 4.06%, nominal holder accounts (domestic) 2.00%, securities companies 1.11%, overseas institutions 4.49%, and insurance institutions 0.12% [47]. - The holder structure of inter - bank certificates of deposit: non - legal entity products accounted for 65.50%, commercial banks 28.44%, nominal holder accounts (domestic) 3.11%, securities companies 1.02%, policy banks 1.08%, others 0.31%, insurance institutions 0.07%, credit unions 0.03%, and overseas institutions 0.44% [49]. 3.3 Bond Market Leverage Ratio Observation As of the end of August 2025, the estimated balance of repurchase - to - be - bought pledged repurchase was 11.23 trillion yuan, an increase of 0.2 trillion yuan month - on - month. The leverage ratio was 106.88%, up 0.07 percentage points month - on - month and down 0.65 percentage points year - on - year [50].

Overall Situation - The total bond custody volume of ChinaClear and CCDC was 174.54 trillion yuan, with a monthly net increase of 1506.006 billion yuan, showing a decline in the month - on - month increase. The custody volume of ChinaClear was 48.63 trillion yuan, with a monthly net increase of - 32.193 billion yuan, and the month - on - month increase declined. The custody volume of CCDC was 125.91 trillion yuan, with a monthly net increase of 1538.199 billion yuan, and the month - on - month increase improved [2][3] Bond Types - Interest - rate bonds contributed the main increment in the current month. The custody volume of interest - rate bonds was 119.12 trillion yuan, with a monthly net increase of 1804.834 billion yuan. The custody volume of credit bonds was 33.40 trillion yuan, with a monthly net increase of 27.925 billion yuan. The custody volume of inter - bank certificates of deposit was 20.38 trillion yuan, with a monthly net increase of - 355.61 billion yuan. In ChinaClear, financial bonds (excluding policy - financial bonds) contributed the main increment, with a monthly net increase of 233.8 billion yuan. In CCDC, treasury bonds contributed the main increment, with a monthly net increase of 826.058 billion yuan [4] Institutions - Commercial banks were the main force in increasing bond holdings. The custody volume of commercial banks was 93.01 trillion yuan, with a monthly net increase of 1202.046 billion yuan. The custody volume of securities was 3.20 trillion yuan, with a monthly net increase of 19.31 billion yuan. The custody volume of broad - based funds was 47.95 trillion yuan, with a monthly net increase of - 191.658 billion yuan. The custody volume of overseas institutions was 3.83 trillion yuan, with a monthly net increase of - 99.698 billion yuan. In ChinaClear, policy banks and insurance institutions increased their bond holdings. In CCDC, commercial banks were the main source of increment [5] Leverage - The overall leverage ratio of the bond market in August was 106.88%, a month - on - month increase of 0.07 percentage points. The leverage ratio of commercial banks was 104.58%, a month - on - month increase of 0.03 percentage points. The leverage ratio of non - bank institutions was 109.66%, a month - on - month increase of 0.15 percentage points, and the leverage ratio of securities firms was 138.54%, a month - on - month increase of 0.30 percentage points [6] Bond Market Outlook - In the context of the revision of economic expectations, bond yields are expected to rise trend - wise. In the second half of 2025, the economic growth rate may not decline significantly, structural problems such as prices are expected to improve trend - wise, and the allocation between stocks and bonds will continue to switch, with bond yields and the stock market expected to continue to rise [7]