1. Report Industry Investment Rating The report does not mention the industry investment rating. 2. Core Viewpoints of the Report - In Q4 2025, the scale of public - offering bond funds increased quarter - on - quarter, but the structure was significantly differentiated. The net asset value of first - level bond funds decreased significantly, while that of second - level bond funds increased significantly. The net asset value of medium - and long - term pure bond funds decreased significantly, while that of short - term pure bond funds and passive index bond funds increased significantly [4][52]. - The bond - holding market value of bond funds increased quarter - on - quarter in Q4 2025, but the bond - holding proportion of most types of bond funds decreased compared with the previous quarter, except for medium - and long - term pure bond funds [13]. - The market value of the top five heavy - holding bonds of active bond funds mostly decreased in Q4 2025 compared with Q3, mainly due to the significant decline in the market value of treasury bonds and policy - financial bonds [31]. 3. Summary by Relevant Catalogs 3.1 2025 Q4 Bond Fund Overall Changes - As of the end of Q4 2025, the total net asset value of public - offering bond funds (including pure bond funds, hybrid bond funds, index bond funds, and convertible bond funds) was 11.00 trillion yuan, an increase of 0.45 trillion yuan compared with Q3 2025, reaching a new high since Q1 2023 [8]. - In Q4 2025, the net asset value of medium - and long - term pure bond funds and first - level hybrid bond funds decreased significantly quarter - on - quarter, while the net asset value of short - term pure bond funds, second - level hybrid bond funds, and passive index bond funds increased significantly. Specifically, medium - and long - term pure bond funds had a net redemption of 76.9 billion shares, with a net asset value decrease of 70.4 billion yuan (a 1.2% decline); first - level hybrid bond funds had a net subscription of 400 million shares, with a net asset value decrease of 130.9 billion yuan (a 13.3% decline). Short - term pure bond funds had a net subscription of 24.7 billion shares, with a net asset value increase of 135 billion yuan (a 15.7% increase); second - level hybrid bond funds had a net subscription of 95.1 billion shares, with a net asset value increase of 205.9 billion yuan (a 15.4% increase); passive index bond funds had a net subscription of 52.6 billion shares, with a net asset value increase of 324.6 billion yuan (a 22.6% increase) [9]. - The net asset value of credit - bond index bond funds increased by 255.2 billion yuan quarter - on - quarter in Q4 2025, a 62.4% increase, continuing the scale - growth trend [10]. 3.2 Asset Allocation of Various Bond Funds - In Q4 2025, the market value of bond holdings of bond funds increased quarter - on - quarter, but the bond - holding proportion of most types of bond funds decreased compared with the previous quarter, except for medium - and long - term pure bond funds. As of Q4 2025, the total market value of bond holdings of bond funds was 11.97 billion yuan, an increase of 0.38 billion yuan compared with the previous quarter. The bond - holding proportion of short - term pure bond funds was 95.8%, a 0.2 - percentage - point decrease compared with Q3 2025; that of medium - and long - term pure bond funds was 97.1%, a 0.2 - percentage - point increase; that of first - level and second - level hybrid bond funds was 96.4% and 82.1% respectively, with decreases of 0.3 and 0.03 percentage points respectively; that of passive index bond funds was 92.7%, a 3.0 - percentage - point decrease; and that of convertible bond funds was 89.4%, a 0.2 - percentage - point decrease [13]. - In Q4 2025, the convertible - bond holding scale of first - and second - level bond funds increased. The total market value of convertible bonds held by first - level bond funds was 65.7 billion yuan, a 2.7 - billion - yuan increase quarter - on - quarter; that of second - level bond funds was 106.3 billion yuan, a 3.3 - billion - yuan increase. However, the proportion of convertible - bond market value to bond - holding market value of first - level bond funds increased slightly by 0.05 percentage points to 6.81%, while that of second - level bond funds decreased by 1.37 percentage points to 7.54% [27]. 3.3 Structural Changes in Heavy - Holding Bond Types of Bond Funds in Q4 2025 - Overall, the market value of the top five heavy - holding bonds of active bond funds mostly decreased in Q4 2025 compared with Q3, mainly due to the significant decline in the market value of treasury bonds and policy - financial bonds [31]. - **Interest - rate bonds**: In Q4 2025, the market value of heavy - holding interest - rate bonds (including quasi - interest - rate bonds such as Huijin bonds and railway bonds) was 1,896.4 billion yuan, a decrease of 237.6 billion yuan compared with Q3 2025. The decrease in the scale of interest - rate bond holdings was mainly due to the significant decline in the market value of treasury bonds and policy - financial bonds [31]. - **Financial bonds**: In Q4 2025, the market value of the top five heavy - holding commercial financial bonds was 178.5 billion yuan, a 46.1 - billion - yuan decrease quarter - on - quarter; the market value of bank secondary capital bonds was 125.8 billion yuan, a 31.2 - billion - yuan decrease; the market value of bank perpetual bonds was 34.3 billion yuan, a 14.8 - billion - yuan decrease [31]. - **Industrial bonds and urban investment bonds**: The market value of the top five heavy - holding industrial bonds was 85.2 billion yuan, a 28.2 - billion - yuan decrease (a 24.9% decline) compared with the previous quarter; the market value of urban investment bonds was 56.7 billion yuan, a 12.7 - billion - yuan decrease (an 18.3% decline) [32]. 3.3.1 Urban Investment Bonds - In Q4 2025, the market value of urban investment bonds in the top five heavy - holding bonds of active bond funds was 56.7 billion yuan, a 12.7 - billion - yuan decrease compared with the previous quarter. In terms of regions, the market value of urban investment bonds in the top five heavy - holding bonds of bond funds in regions such as Zhejiang, Shandong, and Jiangsu was relatively high, at 8.6 billion yuan, 6.8 billion yuan, and 6.0 billion yuan respectively in Q4 2025, with decreases of 2.39 billion yuan, 0.47 billion yuan, and 1.83 billion yuan respectively compared with the previous quarter. In terms of implicit ratings, the market value of urban investment bonds with different implicit ratings held by active bond funds decreased compared with the previous quarter. For example, the market value of the top five heavy - holding urban investment bonds with AA -, AA(2), AA, and AA + ratings decreased by 1.28 billion yuan, 3.78 billion yuan, 6.30 billion yuan, and 5.47 billion yuan respectively compared with the previous quarter [35]. - Overall, the issuers of urban investment bonds with relatively large holding scales by bond funds in Q4 2025 were still mainly AAA - rated provincial and prefecture - level state - owned enterprises, continuing the "high - grade, state - owned enterprise" holding - structure characteristics of the previous quarter. Bond funds preferred transportation - investment - type entities such as Shandong Hi - Speed Group, Hunan Hi - Speed Group, and Jilin Hi - Speed Group, as well as local comprehensive urban - investment entities such as Qingdao Urban Construction Investment Group, Zhuji State - owned Assets Management Co., Ltd., and Hanjiang State - owned Capital Investment Group [40]. 3.3.2 Industrial Bonds - In Q4 2025, the market value of industrial bonds in the top five heavy - holding bonds of active bond funds was 85.2 billion yuan, a 28.2 - billion - yuan decrease compared with the previous quarter. In terms of industries, the market value of the top five heavy - holding industrial bonds of active bond funds in industries such as public utilities, non - bank finance, and transportation was relatively high, at 19.3 billion yuan, 13.0 billion yuan, and 10.3 billion yuan respectively in Q4 2025. Except for a slight increase in the market value of non - bank finance industrial bonds compared with the previous quarter, the market value of industrial bonds in other industries decreased to varying degrees. For example, the market value of the top five heavy - holding industrial bonds of active bond funds in the comprehensive, transportation, and coal industries decreased by 6.4 billion yuan, 5.3 billion yuan, and 3.2 billion yuan respectively compared with Q3 2025. In terms of implicit ratings, the market value of the top five heavy - holding industrial bonds with AA, AA +, and AAA - ratings decreased significantly, with decreases of 7.7 billion yuan, 11.1 billion yuan, and 6.4 billion yuan respectively compared with the previous quarter [42]. - Overall, the industrial entities with relatively large holding scales by active bond funds were mainly central state - owned enterprises and some provincial or municipal - level industrial entities, all with AAA ratings. Active bond funds had relatively high market values of industrial bonds of entities such as State Grid Corporation of China, China Everbright Group, China Southern Power Grid, Sinomach Holdings, and China Chengtong Holdings. In terms of changes in the scale of holding market value, the holding scales of active bond funds for China Everbright Group and China Southern Power Grid increased significantly in Q4 2025, with increases of 3.4 billion yuan and 1.5 billion yuan respectively compared with Q3 2025 [45]. 3.3.3 Financial Bonds - In Q4 2025, the market value of financial bonds in the top five heavy - holding bonds of active bond funds was 396.0 billion yuan, a 103.1 - billion - yuan decrease compared with the previous quarter. In terms of bond types, the market value of commercial financial bonds and bank secondary capital bonds in the top five heavy - holding bonds of active bond funds decreased significantly, with decreases of 46.1 billion yuan and 31.2 billion yuan respectively compared with the previous quarter. In terms of implicit ratings, the market value of the top five heavy - holding financial bonds with AA + and AAA - ratings decreased significantly, with decreases of 22.7 billion yuan and 61.7 billion yuan respectively compared with the previous quarter [47]. - Overall, the financial bonds with relatively large holding scales by active bond funds were mainly concentrated in national - share large - scale banks and some large - scale city commercial banks. In Q4 2025, active bond funds had relatively high market values of financial bonds of the five major state - owned banks [50]. 3.4 Investment Suggestions - In Q4 2025, the scale of public - offering bond funds increased quarter - on - quarter, but the structure was significantly differentiated. The significant decrease in the net asset value of first - level bond funds and the significant increase in that of second - level bond funds may be mainly due to the high sentiment in the equity and commodity markets in Q4 2025, which diverted funds from the bond market, and bond funds sought returns in "fixed - income plus". The significant decrease in the net asset value of medium - and long - term pure bond funds and the significant increase in that of short - term pure bond funds and passive index bond funds may be mainly due to the disturbance of the new redemption - fee regulations in Q4 2025 and the demand of institutions to realize floating profits, resulting in a generally limited willingness of bond funds to extend the duration [52].