1. Report Industry Investment Rating No information provided in the content. 2. Core View of the Report In March 2025, the leverage ratio of the inter - bank bond market increased month - on - month but was slightly lower than the historical average. The total bond custody scale of China Central Depository & Clearing Co., Ltd. (CCDC) and Shanghai Clearing House increased. Different institutions had different investment preferences for various bond types, with commercial banks significantly increasing their allocation of interest - rate bonds and broad - based funds increasing their allocation of inter - bank certificates of deposit [1][2][4]. 3. Summary According to the Directory 3.1 Bank - Inter Leverage Ratio: Up Month - on - Month, Lower than the Same Period in Previous Years At the end of March, the inter - bank bond market leverage ratio was 107.03%, up 0.8 pct from 106.23% at the end of the previous month, and slightly lower than the historical average [1][12]. 3.2 Custody Data Overview In March 2025, the total bond custody scale of CCDC and Shanghai Clearing House was 166.22 trillion yuan, a month - on - month increase of 2655.6 billion yuan. CCDC's custody scale increased by 1308.9 billion yuan, and Shanghai Clearing House's increased by 1346.7 billion yuan. Treasury bonds, local government bonds, policy - bank bonds, medium - term notes, and inter - bank certificates of deposit contributed to the increase, while enterprise bonds, short - term financing bonds, and private placement notes contributed to the decrease [2][15]. 3.3 By Bond Type: Net Financing of Treasury Bonds and Inter - bank Certificates of Deposit Increased, Credit Bonds Had Net Repayment - **Interest - rate Bonds**: In March 2025, the total custody scale of major interest - rate bonds was 109.14 trillion yuan, a month - on - month increase of 1584.1 billion yuan. Commercial banks and broad - based funds were the main buyers, increasing their holdings by 814.8 billion yuan and 401.4 billion yuan respectively. For treasury bonds, commercial banks were the main buyers; for policy - bank bonds, broad - based funds were the main buyers; for local government bonds, commercial banks and broad - based funds increased their holdings [3][17][48]. - **Credit Bonds**: The total custody scale of major credit bonds was 15.54 trillion yuan, a month - on - month decrease of 1.01 billion yuan. Broad - based funds and commercial banks increased their holdings. For enterprise bonds, all institutions reduced their holdings; for medium - term notes, commercial banks were the main buyers; for short - term financing bonds, broad - based funds were the main buyers; for ultra - short - term financing bonds, multiple institutions reduced their holdings [3][29][48]. - **Inter - bank Certificates of Deposit**: The custody scale was 21.18 trillion yuan, a month - on - month increase of 1115 billion yuan. Broad - based funds were the main buyers, increasing their holdings by 1306.6 billion yuan, while commercial banks were the main sellers, reducing their holdings by 264.8 billion yuan [3][45][48]. 3.4 By Institution: Commercial Banks Significantly Increased Allocation of Interest - rate Bonds, Broad - based Funds Increased Allocation of Inter - bank Certificates of Deposit - **Commercial Banks**: The custody scale of major bonds was 80.04 trillion yuan, a month - on - month increase of 561.1 billion yuan. They increased their holdings of interest - rate bonds and credit bonds by 814.8 billion yuan and 11.1 billion yuan respectively, and reduced their holdings of inter - bank certificates of deposit by 264.8 billion yuan. They increased their allocation of treasury bonds and local government bonds in interest - rate bonds and medium - term notes in credit bonds [4][49]. - **Broad - based Funds**: The custody scale of major bonds was 35.53 trillion yuan, a month - on - month increase of 1729.7 billion yuan. They increased their holdings of interest - rate bonds, credit bonds, and inter - bank certificates of deposit by 401.4 billion yuan, 21.8 billion yuan, and 1306.6 billion yuan respectively. They increased their allocation of local government bonds, treasury bonds, and policy - bank bonds in interest - rate bonds and medium - term notes and short - term financing bonds in credit bonds [4][49]. - **Overseas Institutions**: The custody scale of major bonds was 4.20 trillion yuan, a month - on - month increase of 146.5 billion yuan. They increased their holdings of interest - rate bonds, inter - bank certificates of deposit, and credit bonds by 3.2 billion yuan, 141.1 billion yuan, and 2.2 billion yuan respectively. They mainly increased their allocation of treasury bonds in interest - rate bonds and slightly increased their allocation of medium - term notes, short - term financing bonds, and ultra - short - term financing bonds in credit bonds [4][53]. - **Insurance Institutions**: The custody scale of major bonds was 4.03 trillion yuan, a month - on - month increase of 93.5 billion yuan. They increased their holdings of interest - rate bonds and inter - bank certificates of deposit by 93.1 billion yuan and 1.3 billion yuan respectively, and reduced their holdings of credit bonds by 1 billion yuan. They mainly increased their allocation of local government bonds and treasury bonds in interest - rate bonds and slightly reduced their allocation of medium - term notes and enterprise bonds in credit bonds [4][53]. - **Securities Companies**: The custody scale of major bonds was 2.76 trillion yuan, a month - on - month increase of 118.1 billion yuan. They increased their holdings of interest - rate bonds, credit bonds, and inter - bank certificates of deposit by 88.7 billion yuan, 3.3 billion yuan, and 26.1 billion yuan respectively. They mainly increased their allocation of treasury bonds in interest - rate bonds and increased their allocation of medium - term notes in credit bonds [4][53]. - **Credit Unions**: The custody scale of major bonds was 1.89 trillion yuan, a month - on - month decrease of 14.8 billion yuan. They increased their holdings of interest - rate bonds by 21.6 billion yuan and reduced their holdings of credit bonds and inter - bank certificates of deposit by 0.63 billion yuan and 35.8 billion yuan respectively. They increased their allocation of treasury bonds, policy - bank bonds, and local government bonds in interest - rate bonds [5][54].

Report Summary 1. Report Industry Investment Rating No industry investment rating is provided in the report. 2. Core Viewpoints - In March, the total bond custody scale increased by 265.56 billion yuan month - on - month, with the increment mainly contributed by inter - bank certificates of deposit (CDs), which reached a record high of 1.12 trillion yuan. However, the custody increments of various interest - rate bonds and credit bonds decreased slightly compared to the previous month [4][7]. - After a mid - to - early - month correction, the bond market recovered in late March. Due to looser funds, the demand for CDs from broad - based funds soared, leading to a significant increase in net financing of CDs despite a high maturity volume, and CD rates peaked and declined. The increased purchases of interest - rate bonds by trading institutions such as broad - based funds and securities firms, along with a marginal decrease in government bond supply, alleviated the pressure on commercial banks' asset - side to undertake primary issuance, and thus eased their liability pressure. However, the demand for credit bonds from trading desks remained weak, the bond purchases by insurance companies slightly decreased, and overseas institutions also significantly increased their CD holdings, with the overall bond purchase volume reaching a new high since August last year [4][9]. - In March, the repo balance increased significantly, and the bond market leverage ratio rose by 0.6 pct month - on - month to 106.8%. Although the increase was similar to the historical average for the same period, it remained at a low level since 2022. By institution, the leverage ratios of commercial banks and non - bank institutions both increased but were still at relatively low levels [4][38]. 3. Summary by Directory 3.1. Inter - bank CD Supply Surge Drove a 2.7 - Trillion - Yuan Increase in March Bond Custody Volume - The total bond custody scale in March increased by 265.56 billion yuan month - on - month, with the increment mainly from inter - bank CDs, reaching 1.12 trillion yuan. The custody increments of other interest - rate bonds and credit bonds decreased slightly. For interest - rate bonds, the net financing and net payment of treasury bonds increased, but the custody increment decreased slightly; the custody increment of local bonds decreased as the issuance of replacement bonds slowed; and the custody increment of policy - bank bonds decreased due to an increase in the maturity volume. For credit bonds, the custody increments of medium - term notes and short - term commercial paper decreased, and the custody scales of enterprise bonds and PPNs continued to decline [7]. - The commercial bank bond custody volume decreased by 53 billion yuan from an increase of 120 billion yuan in the previous month, while the non - bank bond custody increment increased by 338 billion yuan to 448 billion yuan. The custody scale decline of credit - asset - backed securities narrowed to 130 billion yuan. The issuance scale of inter - bank CDs in March reached a record high, with the custody increment rising by 634.4 billion yuan to 1.115 trillion yuan, which was the main reason for the increase in March's custody increment [7]. 3.2. In March, Trading Desks Massively Increased Holdings of Inter - bank CDs and Interest - Rate Bonds, Significantly Easing Commercial Banks' Liability Pressure - **Broad - based Funds**: The custody increment of broad - based funds increased significantly by 158.5 billion yuan to 170.5 billion yuan. They increased their holdings of inter - bank CDs, government bonds, local bonds, and policy - bank bonds, and reduced their holdings of credit bonds and commercial bank bonds. Relative to the stock, they increased their allocation of bonds, mainly inter - bank CDs and various interest - rate bonds [13]. - **Securities Firms**: The bond custody scale of securities firms increased by 1.145 billion yuan from a decrease of 560 million yuan in the previous month, mainly by increasing their holdings of treasury bonds. Relative to the stock, they also increased their allocation of bonds, mainly treasury bonds [17]. - **Insurance Companies**: The bond custody increment of insurance companies slightly decreased by 1.48 billion yuan to 9.64 billion yuan. They reduced their holdings of medium - term notes and increased their holdings of local bonds, among others. Relative to the stock, their bond - allocation strength weakened slightly [20]. - **Overseas Institutions**: The bond custody increment of overseas institutions increased by 7.19 billion yuan to 14.18 billion yuan, reaching a new high since August last year. They significantly increased their holdings of inter - bank CDs and increased their holdings of treasury bonds but reduced their holdings of policy - bank bonds. Relative to the stock, they increased their bond - allocation strength [26]. - **Other Institutions**: The bond custody increment of other institutions decreased from an increase of 60.18 billion yuan in the previous month to a decrease of 990 million yuan, mainly affected by the reduction in the net investment of central bank's outright reverse repurchase. They reduced their holdings of local bonds, policy - bank bonds, and treasury bonds and also reduced their holdings of inter - bank CDs, medium - term notes, and short - term commercial paper. Relative to the stock, they reduced their bond allocation [28]. - **Commercial Banks**: The bond custody scale of commercial banks increased by 58.17 billion yuan, with a decrease of 83.66 billion yuan compared to the previous month. They significantly reduced their holdings of inter - bank CDs, and also reduced their holdings of policy - bank bonds, short - term commercial paper, and commercial bank bonds. Relative to the stock, they reduced their bond allocation [31]. - **Credit Unions**: The bond custody volume of credit unions decreased from an increase of 8.67 billion yuan in the previous month to a decrease of 1.9 billion yuan, mainly due to a large - scale reduction in inter - bank CD holdings. Relative to the stock, they reduced their bond allocation [34]. 3.3. In March, the Bond Market Leverage Ratio Seasonally Rebounded but Remained at a Low Level Since 2022 - In March, the repo balance increased significantly, and the bond market leverage ratio rose by 0.6 pct month - on - month to 106.8%. The increase was similar to the historical average for the same period but remained at a low level since 2022. By institution, the leverage ratio of commercial banks rose by 0.6 pct to 103.2%, only higher than that in January - February this year; the non - bank institution leverage ratio rose by 0.5 pct to 115.9%, still at a relatively low level since April 2022. Among non - bank institutions, the leverage ratios of securities firms and non - legal - person products increased to 200.7% and 114.4% respectively, remaining near historical lows [38]. - In broad - based funds, the repo balances of various institutions rebounded. The repo balances of money market funds and wealth management products increased significantly but were still near historical lows. The repo balances of insurance companies and other products with relatively stable liabilities were close to the high in January this year, and the repo balance of non - money market products of fund companies was relatively stable, still below the pre - March 2023 level [38].