2025 年 12 月 18 日 相关研究 证券分析师 黄伟平 A0230524110002 huangwp@swsresearch.com 奕强 A0230524110003 luangiang@swsresearch.com 王哲一 A0230525100003 wangzy@swsresearch.com 联系人 王哲一 A0230525100003 wangzy@swsresearch.com | 1．前世：2022 年之前 30Y 国债关注度不高 5 | | --- | | 2. 今生: 2022 年-2024 年, 30Y 国债定价权向交易盘转移 | | …… | | 2.1 定价"物价持续偏低" 叙事+缺少技术变革… 2.2 流动性改善是催化剂， "资产荒" 是主驱动 … | | 3.今生: 当下 30Y 国债面临"资产荒"缓解与供需结构错配 | | …… | | 3.1 "资产荒"缓解的镜像：我国 AI 技术突破叠加反内卷，经济预期扭 | | 转 …………………………………………………………………………………………………………………………………………………………………………………………………… ...

债 券 策 略 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 王哲一 A0230525100003 wangzy@swsresearch.com 本研究报告仅通过邮件提供给 中庚基金 使用。1 券 研 究 请务必仔细阅读正文之后的各项信息披露与声明 债 证 券 研 究 报 告 - 2025 年 12 月 18 日 30Y 国债的"前世今生"：供需结构、 定价权迁移与曲线重定价 ⚫ 30Y 国债定价权发生了三次迁移，30Y 国债"资产荒"和 30Y 国债流动性改善是驱动定 价权转移的逻辑主线。 ⚫ 前世：2022 年之前 30Y 国债关注度不高。 ◼ 2022 年之前，30Y 国债供给规模远低于 10Y 国债，流动性不强，主要买入力量为 保险公司。 ◼ 交易盘对 30Y 国债参与不多，当债市未形成一致性的向上或向下方向时，决定配置 盘对 30Y 国债买入力量的重要因素在于静 ...

1. Report Industry Investment Rating No relevant content provided. 2. Core Viewpoints of the Report - Year - end allocation of ultra - long bonds is weak. The problem of insufficient ultra - long bond underwriting has intensified this week, driving up the 30Y Treasury bond rate. Although some institutions have increased their allocation, funds still have weak buying power due to redemption pressure [1][10]. - Banks' willingness to allocate ultra - long bonds in the secondary market has decreased due to primary underwriting and IRRBB assessment pressure. Insurance funds continue the trend of stock - bond rebalancing and focus on local bonds and long - term credit bonds [1]. - There are feasible paths to solve the ultra - long bond underwriting problem, such as controlling the duration of new government bonds, central bank's purchase of ultra - long Treasury bonds, guiding non - bank funds to participate in subscriptions, and reducing the pressure on banks' book interest rate risk indicators [2]. - The central bank maintains a supportive attitude. The carry trade strategy is dominant, and investors can moderately participate in band trading after adjustments [2]. 3. Summary by Relevant Catalogs 3.1 Review Summary and Bond Market Outlook - This week, the bond market sentiment was weak, with the 10Y and 30Y Treasury bond rates rising by 1bp and 7bp respectively. The market showed different trends on different days due to factors such as PMI data, stock market performance, and policy expectations [9]. - The allocation of ultra - long bonds at the year - end is weak. Banks' willingness to allocate ultra - long bonds in the secondary market has decreased, and insurance funds focus on local bonds and long - term credit bonds [1][10]. - There are feasible paths to solve the ultra - long bond underwriting problem, and the central bank's supportive attitude remains unchanged. The carry trade strategy is dominant, and investors can moderately participate in band trading [2][24]. 3.2 Bond Market Review 3.2.1 Funding Situation - The central bank conducted a net withdrawal, and funding rates declined. From December 1st to 5th, the central bank's net withdrawal was 8480 billion yuan. R007 and DR007 decreased by 3bp compared to November 28th [28][29]. 3.2.2 Secondary Market Trends - Yields first rose and then fell this week. Except for the 1Y and 3Y Treasury bonds, the rates of other key - term Treasury bonds increased. The 10Y and 30Y Treasury bond yields rose by 1bp and 7bp respectively compared to November 28th [37]. 3.2.3 Bond Market Sentiment - The 30Y - 10Y Treasury bond term spread widened significantly, and the duration of bond funds decreased. The 30Y Treasury bond weekly turnover rate continued to rise to 35%, and the inter - bank leverage ratio rose to 107.3% [43]. 3.2.4 Bond Supply - This week, the net financing of interest - rate bonds decreased compared to last week. The net financing of Treasury bonds increased, while that of local government bonds and policy - bank bonds decreased. The net financing of inter - bank certificates of deposit turned positive, and the average issuance rate increased [57][63]. 3.3 Economic Data - Since December, movie consumption has been significantly stronger than seasonal trends, and the freight rate index has weakened. Real estate, consumption, export, and industrial production show different trends [69]. - Infrastructure and price high - frequency data show that the mill operation rate has rebounded, inventory indicators have continued to decline marginally, and most price indicators have increased [72]. 3.4 Overseas Bond Market - US consumer confidence slightly increased in December, and the expectation of the Fed's interest rate cut has risen. US bonds, Japanese and Korean bond markets declined. The 10Y - 2Y US Treasury bond spread widened, and the Sino - US 10Y Treasury bond spread widened [77][78][81]. 3.5 Major Asset Classes - The Shanghai - Shenzhen 300 index rebounded this week. Shanghai copper rose significantly, and the Nanhua live - hog index weakened. The performance of major asset classes is: Shanghai copper > rebar > Shanghai - Shenzhen 300 > Shanghai gold > CSI 1000 > Chinese - funded US dollar bonds > crude oil > Chinese bonds > convertible bonds > US dollar > live hogs [82]. 3.6 Policy Review - On December 5th, relevant policies such as the adjustment of insurance company risk factors, the management method of financial leasing company business, and articles on capital market development were released. On December 4th, an article on the construction of the monetary policy system was published. On December 1st, the list of infrastructure REITs project industries was released [86][90][91].

本周10Y国债利率与上周基本持平，而30Y国债利率则上行近7BP。 30年国债期货不仅抹平去年"适度宽松货币政策"以来的全部涨幅，甚至还倒亏了不少， 原来"超长债"的真实含义是"超偿债"！ | | 近半年 ▲ | 近一年 | | --- | --- | --- | | 工具製元A | -7.99% | -3.22% | | 富丰和纯债A | -7.84% | -6.34% | | 天来稳健添利A | -7.03% | -6.16% | | 眼瑞夏一年定开债 | -6.75% | -5.23% | | 果兴尊益利率债6个月: | -6.62% | -1.91% | | J裕A | -6.28% | -2.27% | | 上证30年期国债ETF | -6.13% | -1.67% | | 中债-30年期国债ETF | -6.11% | -1.56% | 今天小作文传12月会议重提jzjx，带动债市情绪有所好转。 但债农都在自嘲：怕不是降准降息，而是降职降薪啊！ 如今又是一年12月，站在岁末年初的节点，似乎90%以上的投资人都在预测2026年将是股市大年。 重仓30Y国债的债基近半年亏损超6%，听说有投资经理濒临抑 ...

Report Summary 1. Core Issues Addressed - Analyze the reasons for the recent decline in the bond market - Provide an outlook for the subsequent market trends [3] 2. Core Views - Interest rate decline requires positive factors for catalysis, and the yield curve may remain steep due to supply - demand dynamics - For band trading, it is advisable to avoid 30 - year treasury bonds for now. If investing in 30 - year treasury bonds, attention should be paid to the potential increase in liquidity of Special 02 and Ordinary 02 in the future - The coupon strategy has relatively higher certainty under loose liquidity conditions [6][8][18] 3. Summary by Section 3.1 Event - In the past month, despite many positive factors in the bond market (weak fundamentals, loose funds, less supply in the fourth quarter, and the traditional year - end front - running behavior of institutions), the market has seen more declines than gains, and ultra - long bonds have performed particularly weakly. As of December 2, 25 Special 02 has reached its highest level since listing [4][13] 3.2 Comments - **Central Bank's Bond Transactions**: In November, the central bank's treasury bond transactions were only 50 billion yuan. After the news was announced, the active 30 - year treasury bond showed a repair of about 0.5 basis points, indicating that the previous pessimistic expectations had materialized. The central bank's bond transactions are mainly for government bond issuance and to maintain liquidity, with limited actual benefits to the bond market [6][14] - **Banks' Bond Sales for Profit - Taking**: This year is the second year with a significantly higher proportion of ultra - long bond supply. As of December 2, the net financing of treasury bonds this year was 4.97 trillion yuan, of which bonds with a maturity of over 10 years accounted for 30% (1.48 trillion yuan), compared with 28% in 2024 and 7% in 2023. Due to duration assessment and profit requirements, banks have a "negative feedback" effect on ultra - long bonds. Some banks, such as rural commercial banks, are unable to absorb more ultra - long bonds, and banks as a whole have the demand to sell old bonds through AC/OCI accounts to realize floating profits [6][15] - **Trading - Desk Negative Factors**: The trading volume of 10 - year treasury bonds has significantly declined, with the daily trading volume of the active 10 - year treasury bond dropping from about 60 billion yuan to about 30 billion yuan. From the CNEX divergence index on December 2, the main selling institutions are funds and securities firms. Public funds are facing the uncertainty of new redemption fee regulations, and securities firms are still short - selling 30 - year treasury bonds by borrowing them [6][8][18] - **Insurance Institutions' Investment Preference**: This year, the main investment of insurance institutions is local government bonds, which may further increase the volatility of 30 - year treasury bonds [8][18]

1. Report Industry Investment Rating No information provided regarding the industry investment rating. 2. Core Viewpoints of the Report - Recent bond fund durations have increased. On November 7, the median duration (including leverage) of medium - and long - term bond funds rose by 0.14 years compared to November 3 [5][10]. - From a seasonal perspective, historical data shows that interest rates tend to decline from November to December. Current conditions are favorable for going long on the bond market, but the odds may be limited [5][10]. - Investors should pay attention to the issuance scale of the 30 - year ordinary treasury bonds to be issued in November and December. If the scale is around 300 billion yuan, the bond may not strengthen significantly; if it is around 700 billion yuan, it may strengthen [5][11]. 3. Summary by Relevant Catalog 3.1 This Week's Bond Market Review - Bond fund durations have increased. Funds have increased their purchases of credit bonds, bought 30 - year treasury bonds, sold 10 - year treasury bonds, and increased their allocations of 10 - year policy financial bonds and 20 - and 30 - year local government bonds. Big banks continue to buy short - term bonds, and securities firms have slightly net - sold [5][10]. - Conditions are favorable for going long on the bond market, but the odds may be limited. Attention should be paid to the issuance scale of 30 - year ordinary treasury bonds [5][10][11]. 3.2 Bond Yield Curve Tracking 3.2.1 Key Maturity Interest Rates and Spread Changes - As of November 7, compared with November 3, the 1 - year treasury bond yield rose 1.53bp to 1.40%, the 10 - year rose 1.98bp to 1.81%, and the 30 - year rose 2.05bp to 2.16%. The 30 - year - 10 - year treasury bond spread rose 0.07bp to 34.39bp, and the 10 - year CDB - 10 - year treasury bond spread rose 1.11bp to 13.47bp [12]. 3.2.2 Treasury Bond Maturity Spread Changes - As of November 7, compared with November 3, the 3 - year - 1 - year treasury bond spread rose 0.85bp to 4.04bp, the 5 - year - 3 - year spread fell 1.33bp to 14.24bp, the 7 - year - 5 - year spread rose 2.14bp to 12.65bp, the 10 - year - 7 - year spread fell 1.21bp to 10.04bp, the 20 - year - 10 - year spread rose 0.48bp to 33.42bp, and the 30 - year - 20 - year spread fell 0.41bp to 0.97bp [14]. 3.3 Bond Market Leverage and Funding Situation 3.3.1 Inter - bank Pledged Repurchase Balance - As of November 7, compared with November 3, the inter - bank pledged repurchase balance decreased by 0.48 trillion yuan to 11.61 trillion yuan [17]. 3.3.2 Inter - bank Bond Market Leverage Ratio Changes - As of November 7, compared with November 3, the inter - bank bond market leverage ratio decreased by 0.34 percentage points to 106.99% [18]. 3.3.3 Pledged Repurchase Turnover - From November 3 to November 7, the average pledged repurchase turnover was 7.97 trillion yuan, and the average overnight turnover was about 7.14 trillion yuan, with an average overnight turnover ratio of 89.59% [22][23]. 3.3.4 Inter - bank Funding Operation - From November 3 to November 7, bank fund lending and single - day fund supply first increased and then decreased. As of November 7, the net fund lending of large banks and policy banks was 4.44 trillion yuan, and the single - day fund supply was 3.90 trillion yuan. Regarding funding rates, DR001 was 1.3321%, DR007 was 1.4130%, R001 was 1.3916%, and R007 was 1.4677% [24][27]. 3.4 Medium - and Long - Term Bond Fund Durations 3.4.1 Median Bond Fund Duration - As of November 7, the median duration of medium - and long - term bond funds was 2.72 years (de - leveraged), up 0.05 years from November 3; the median duration (including leverage) was 2.87 years, up 0.14 years [39]. 3.4.2 Median Interest - Rate Bond Fund Duration - As of November 7, the median duration of interest - rate bond funds (including leverage) was 3.83 years, up 0.10 years from November 3; the median duration (de - leveraged) was 3.34 years, up 0.04 years. The median duration of credit bond funds (including leverage) was 2.62 years, up 0.10 years, and (de - leveraged) was 2.53 years, up 0.07 years [43]. 3.5 Bond Lending Balance Changes - As of November 6, compared with November 3, the borrowing volume of 10 - year CDB bonds fluctuated [46].

Report Industry Investment Rating No industry investment rating is provided in the report. Report Core Viewpoints - In October, the escalation of Sino-US trade frictions led to increased volatility in global risk assets. The market is waiting for the implementation of tariffs, but the impact may be controllable. After the Sino-US high - level video call on October 18th to restart consultations and the expected APEC summit at the end of October, the short - term emotional pressure on policy gaming may ease, but potential risks such as the results of Sino - US economic and trade consultations and the pressure on China's economic data need attention. The Fed may cut interest rates by 25BP in October, significantly alleviating the inverted Sino - US interest rate spread and opening up room for further loosening of China's monetary policy [2][10][85]. - The domestic economic recovery momentum is weak. Consumption and exports may face pressure. The National Day holiday consumption data shows "volume increase but price slowdown", indicating weak consumer willingness, and the export growth rate in Q4 this year may face pressure [10]. - The current bond market has prominent allocation value, and bond yields may fluctuate downward. The report is bullish on the bond market in October. Considering the domestic fundamentals and external environment, the domestic policy interest rate may be cut by 10 - 20BP in Q4. The preferred bonds for attack are 10Y China Development Bank bonds, 30Y treasury bonds, and 5Y capital bonds. It is predicted that the yield of 10Y treasury bonds will return to around 1.65%, 30Y treasury bonds to 1.9%, and 5Y large - bank secondary capital bonds to 1.9% [4][11][85]. Summary by Directory 1. Macro News - In the first three quarters of 2025, the cumulative increase in social financing scale was 30.09 trillion yuan, 4.42 trillion yuan more than the same period last year. At the end of September, the stock of social financing scale was 437.08 trillion yuan, a year - on - year increase of 8.7%. The net cash injection in the first three quarters was 761.9 billion yuan. At the end of September, the M2 balance was 335.38 trillion yuan, a year - on - year increase of 8.4%, M1 was 113.15 trillion yuan, a year - on - year increase of 7.2%, and M0 was 13.58 trillion yuan, a year - on - year increase of 11.5%. The increase in RMB deposits in the first three quarters was 22.71 trillion yuan, and the balance at the end of September was 324.94 trillion yuan, a year - on - year increase of 8%. The increase in RMB loans in the first three quarters was 14.75 trillion yuan, and the balance at the end of the month was 270.39 trillion yuan, a year - on - year increase of 6.6% [12]. - In September, the CPI was - 0.3% year - on - year, an increase of 0.1 pct from the previous month, mainly dragged down by food and energy prices, and 0.1% month - on - month, an increase of 0.1 pct from the previous month. The year - on - year increase in core CPI expanded to 1.0% in September. The year - on - year decline in PPI narrowed to 2.3% in September, an increase of 0.6 pct from the previous month, and remained flat month - on - month [16]. - In the first three quarters of this year, China's total goods trade imports and exports were 33.61 trillion yuan, a year - on - year increase of 4%. Exports were 19.95 trillion yuan, a year - on - year increase of 7.1%, and imports were 13.66 trillion yuan, a year - on - year decrease of 0.2%. The imports and exports to countries along the "Belt and Road" were 17.37 trillion yuan, a year - on - year increase of 6.2%, accounting for 51.7% of the total imports and exports [21]. - On October 18th, Sino - US economic and trade leaders held a video call and agreed to hold a new round of Sino - US economic and trade consultations as soon as possible [23]. 2. Medium - term High - frequency Data 2.1 Consumption - As of October 12th, the daily average retail volume of passenger car manufacturers increased by 6.7% year - on - year, and the daily average wholesale volume decreased by 0.5% year - on - year. As of October 17th, the total box office revenue of national movies in the past 7 days decreased by 27.3% year - on - year. As of October 10th, the total retail volume of three major household appliances increased by 44.2% year - on - year, and the total retail sales increased by 36.4% year - on - year [24][26]. 2.2 Transportation - As of October 12th, the container throughput of ports increased by 3.4% year - on - year. As of October 17th, the average subway passenger volume in first - tier cities in the past 7 days increased by 2.3% year - on - year. As of October 12th, the postal express pick - up volume decreased by 0.7% year - on - year, and the delivery volume decreased by 5.1% year - on - year. The railway freight volume decreased by 0.2% year - on - year, and the highway truck traffic volume decreased by 15.9% year - on - year [28][35][37]. 2.3 Industrial Operating Rates - As of October 15th, the blast furnace operating rate of major steel enterprises was 78.1%, a year - on - year increase of 2.2 pct. As of October 16th, the average asphalt operating rate remained the same year - on - year, the soda ash operating rate was 84.9%, a year - on - year decrease of 2.5 pct, and the PVC operating rate was 75.6%, a year - on - year decrease of 1.8 pct. As of October 17th, the average PX operating rate was 88.5%, and the average PTA operating rate was 75.5% [42][46]. 2.4 Real Estate - As of October 17th, the total commercial housing transaction area in 30 large and medium - sized cities in the past 7 days decreased by 10.9% year - on - year. As of October 10th, the second - hand housing transaction area in 9 sample cities decreased by 43.6% year - on - year [50][51]. 2.5 Prices - As of October 17th, the average wholesale price of pork decreased by 26.9% year - on - year and 8.3% compared with four weeks ago. The average wholesale price of vegetables decreased by 14.9% year - on - year and 1.4% compared with four weeks ago. The average wholesale price of 6 key fruits decreased by 3.5% year - on - year and increased by 3.1% compared with four weeks ago. The average price of thermal coal at northern ports decreased by 18.3% year - on - year and increased by 3.4% compared with four weeks ago. The average spot price of WTI crude oil decreased by 19.1% year - on - year and 7.7% compared with four weeks ago. The average spot price of rebar decreased by 12.0% year - on - year and 0.6% compared with four weeks ago. The average spot price of iron ore remained flat year - on - year and decreased by 0.8% compared with four weeks ago [53][57][62]. 3. Bond and Foreign Exchange Markets - On October 17th, overnight Shibor and some short - term interest rates showed small fluctuations. Most treasury bond yields increased. The yields of 1 - year, 5 - year, 10 - year, and 30 - year treasury bonds were 1.47%, 1.59%, 1.83%, and 2.20% respectively, with increases of 10.1BP, 0.7BP, 0.4BP, and - 3.2BP compared with October 11th. The yields of 1 - year, 5 - year, 10 - year, and 30 - year China Development Bank bonds were 1.62%, 1.78%, 1.99%, and 2.35% respectively, with changes of + 1.1BP, + 1.0BP, - 0.9BP, and - 0.6BP compared with October 11th. The yields of 1 - year, 5 - year, and 10 - year local government bonds were 1.49%, 1.81%, and 2.02% respectively, with decreases of 4.1BP, 1.8BP, and 3.5BP compared with October 10th. The yields of AAA 1 - month and 1 - year, AA + 1 - month and 1 - year inter - bank certificates of deposit increased compared with October 11th. The yields of 10 - year treasury bonds in the US, Japan, the UK, and Germany decreased compared with October 10th. The central parity rate and spot exchange rate of the US dollar against the RMB changed compared with October 10th [65][69][73]. 4. Institutional Behavior - The duration of medium - and long - term pure bond funds for interest - rate bonds and credit bonds showed a slight upward trend this week. On October 17th, the estimated average duration of interest - rate bond funds was around 5.0 years, and the median was around 4.6 years, an increase of about 0.1 year compared with October 10th. The estimated average duration of credit bond funds was around 2.7 years, and the median was around 2.7 years, an increase of about 0.1 year compared with October 10th [82][83]. 5. Investment Recommendations - The report is bullish on the bond market. The preferred bonds for attack are 10Y China Development Bank bonds, 30Y treasury bonds, and 5Y capital bonds. It is predicted that the yield of 10Y treasury bonds will return to around 1.65%, 30Y treasury bonds to 1.9%, and 5Y large - bank secondary capital bonds to 1.9% [4][11][85].

Group 1 - The core viewpoint is that the 30-year government bond yield may experience a 20 basis point adjustment in Q4 due to various factors including a rise in yield from 1.84% to 2.2% and a significant reduction in the issuance of long-term bonds [1] - The risk appetite is expected to decline gradually, with market sentiment shifting from bullish to a more cautious stance, potentially leading to a capital flow back into the bond market [1] - The insurance premium growth is anticipated to improve slowly as the public gradually accepts a 2% deposit rate, which may lead to increased demand for 30-year bonds towards the end of the year [1] Group 2 - As of October 17, 2025, the 5-10 year government bond ETF index has risen by 0.06%, with a cumulative increase of 3.42% over the past year [2] - The trading volume for the 5-10 year government bond ETF was active, with a turnover of 45.05% and a transaction value of 6.95 billion yuan [2] - The latest scale of the 5-10 year government bond ETF reached 1.542 billion yuan, marking a six-month high [3] Group 3 - The 5-10 year government bond ETF has shown a net value increase of 21.93% over the past five years, ranking in the top 17.32% among 179 index bond funds [3] - The maximum drawdown for the 5-10 year government bond ETF in the last six months was 1.09%, with a relative benchmark drawdown of 0.40% [4] - The management fee for the 5-10 year government bond ETF is 0.15%, and the custody fee is 0.05% [5] Group 4 - The tracking error for the 5-10 year government bond ETF over the past month was 0.023%, indicating a close alignment with the underlying index [6] - The index reflects the performance of actively traded government bonds with maturities of 5, 7, and 10 years, calculated using a non-market capitalization weighted method [6]

Group 1 - The report addresses key issues such as analyzing the yield spread between new and old bonds from the perspective of 30Y, 10Y government bonds, and 10Y policy bank bonds, as well as evaluating current trading opportunities for specific bonds [5][13] - The switching of active bonds is influenced by issuance plans, with the scale determining the active status for government bonds, while policy bank bonds rely more on market institutions' behaviors and preferences [5][6] - The new and old bond yield spread exhibits a cyclical pattern of "widening-convergence," where the spread typically widens after a new bond is issued and narrows as liquidity premiums are realized and new bonds are issued [5][14] Group 2 - For 30Y government bonds, the trading focus may remain on the larger scale bond 2500002.IB, while the trading opportunity for the new bond 2500006.IB may be limited due to its yield inversion with the active bond [5][25] - In the case of 10Y government bonds, if the fund redemption fee reform is implemented, the market attention may shift towards this bond type, with the new bond 250016.IB having the potential to become an active bond [31][35] - The 10Y policy bank bonds also show a similar pattern to government bonds, with the yield spread typically widening and then converging after switching, but the opportunities depend more on market sentiment and liquidity changes due to the lack of transparent issuance plans [43][47] Group 3 - The report suggests that investors should focus on structural opportunities, particularly monitoring the transition of 250016.IB to an active bond, especially in the context of potentially increased demand for self-managed bank allocations [48]

Group 1: Report Overview - The report is the Bond Research Weekly for the 4th week of September 2025, focusing on bond market analysis from the perspective of institutional behavior [2][9] Group 2: Investment Rating - Not provided in the report Group 3: Core Viewpoints - The behavior of funds is crucial in the bond market, with their net purchases strongly correlated with interest rate trends. The instability of funds' liability side has increased due to the new sales fee regulations, and the impact of the regulations' implementation should be closely monitored [4][15] - The three institutional behavior changes (funds having nothing left to sell, brokerages closing short positions, and banks "picking up bargains") are favorable for the bond market. Future interest rates may decline due to funds repurchasing bonds, banks increasing allocations, and brokerages closing positions. Currently, interest rate products have a higher probability of success than Tier 2 and credit bonds [4][15] Group 4: Summary by Directory 1. Re - examination after Interest Rate Breakthrough 1.1 Three Changes in Institutional Behavior and Future Outlook - Funds are "sold out": Since Q3, funds have continuously reduced duration. As of September 26, 2025, the median duration of medium - and long - term bond funds (including leverage) dropped to 2.8 years, and the cumulative net purchase of ultra - long treasury bonds (over 10Y) by funds has been negative since early September [3][9] - Brokerages are closing short positions: The borrowing volume of the top three active 10Y treasury bonds remains volatile, while that of 10Y CDB bonds has decreased, indicating brokerage short - position closing before the holiday [10] - Banks are "picking up bargains": Since August, joint - stock banks have continuously bought old 10Y treasury bonds, acting as a "buffer" during the bond market correction. Recently, Tier 2 and perpetual bonds have corrected rapidly, and funds are selling Tier 2 bonds more aggressively [3][14] 1.2 Yield Curve - Treasury bond yields generally increased. On a week - on - week basis, the 1Y yield decreased by 1bp, the 3Y yield increased by 3bp, the 5Y yield changed less than 1bp, the 7Y yield increased by 1bp, the 10Y yield changed less than 1bp, the 15Y yield increased by 1.5bp, and the 30Y yield increased by 2bp. In terms of percentiles, the 1Y dropped to the 10% percentile, and others had various percentile changes [16][18] - CDB bond yields also generally increased. The 1Y yield decreased by 0.5bp, the 3Y yield increased by 2bp, the 5Y yield increased by about 2.3bp, the 7Y yield increased by 4.6bp, the 10Y yield increased by 1.1bp, the 15Y yield increased by about 4.6bp, and the 30Y yield increased by 4.9bp. Percentiles also had corresponding changes [18] 1.3 Term Spread - The spread between treasury bonds and CDB bonds (1Y - DR001, 1Y - DR007) showed a differentiated trend, and the term spread generally widened [19] 2. Bond Market Leverage and Funding Situation 2.1 Leverage Ratio - From September 22 to September 26, 2025, the leverage ratio fluctuated and decreased. As of September 26, it was about 107.06%, up 0.32pct from last Friday and down 0.04pct from Monday [23] 2.2 Repurchase Transactions - From September 22 to September 26, the average daily trading volume of pledged repurchase was about 7.3 trillion yuan, up 0.1 trillion yuan from last week. The average daily trading volume of overnight pledged repurchase was 5.55 trillion yuan, down 0.72 trillion yuan month - on - month. The average overnight trading volume ratio was 75.72%, down 11.92pct month - on - month [27][28] 2.3 Funding Situation - From September 22 to September 26, bank - based fund lending first increased and then decreased. On September 26, the net lending of large and policy banks was 4.09 trillion yuan, and joint - stock, city, and rural commercial banks had a net borrowing of 0.28 trillion yuan. The main fund borrowers were brokerages, and money market funds' lending decreased. DR007, R007, 1YFR007, and 5YFR007 all fluctuated and increased, with different changes compared to last Friday [30] 3. Duration of Medium - and Long - Term Bond Funds 3.1 Overall Duration - From September 22 to September 26, the median duration of medium - and long - term bond funds was 2.68 years (de - leveraged) and 2.79 years (including leverage). On September 26, the median duration (de - leveraged) remained unchanged from last Friday, and the median duration (including leverage) decreased by 0.01 year [41] 3.2 Duration by Bond Fund Type - As of September 26, the median duration of interest - rate bond funds (including leverage) dropped to 3.53 years, down 0.01 year from last Friday; the median duration of credit bond funds (including leverage) dropped to 2.52 years, up 0.01 year from last Friday. The de - leveraged durations also had corresponding changes [44] 4. Category Strategy Comparison - As of September 26, the Sino - US spread generally narrowed, and the implied tax rate (10Y CDB - treasury bond spread) narrowed at the short end and widened at the medium - and long - ends [48] 5. Bond Lending Balance Changes - On September 26, the lending concentration of active 10Y treasury bonds and 10Y CDB bonds increased, that of secondary active 10Y CDB bonds and active 30Y treasury bonds decreased, and that of secondary active 10Y treasury bonds remained unchanged. Except for brokerages, all other institutional lending concentrations increased [50]