1. Report Industry Investment Rating No relevant content provided. 2. Core Viewpoints of the Report - In H1 2025, the scale of pure - bond funds increased by nearly 100 billion yuan. Credit medium - and long - term bond funds showed outstanding performance in a volatile market, but the overall performance of pure - bond funds was inferior to the same period in previous years. Meanwhile, the expansion of pure - bond funds was hindered, and "Fixed Income +" funds became popular in the market [1]. - The scale of index funds increased significantly beyond the seasonal trend. Credit - based index bond funds witnessed explosive growth, while interest - rate based ones had a recovery. For medium - and long - term bond funds, the equilibrium and interest - rate styles grew in scale, while the credit style declined. Short - term and medium - short - term bond funds ended three consecutive quarters of scale reduction [3][4]. 3. Summary by Relevant Catalogs 3.1 2025 H1, the scale of pure - bond funds increased by nearly 100 billion yuan 3.1.1 Credit medium - and long - term bond funds showed outstanding performance in a volatile market - In Q1 2025, affected by multiple negative factors, the bond market was under pressure, and the yield center of pure - bond funds dropped significantly. In Q2, due to factors such as increased risk - aversion sentiment and abundant liquidity, the bond market strengthened, and the single - quarter yield center of pure - bond funds turned positive [11]. - The median return of pure - bond funds in H1 2025 was 0.76%, recovering the losses in Q1 but underperforming the same period in 2024 and 2023. Credit - style products were more popular, with the return center of medium - and long - term credit bond funds reaching 1.00%, leading other styles [1][14]. 3.1.2 The expansion of pure - bond funds was hindered, and "Fixed Income +" became popular in the market - The total scale of pure - bond funds increased from 9.50 trillion yuan at the end of 2024 to 9.59 trillion yuan in mid - 2025, with an increase of only 93.8 billion yuan. In contrast, the total scale of "Fixed Income +" funds increased by 256.9 billion yuan to 1.48 trillion yuan. The "market share" of pure - bond funds decreased by nearly 2 percentage points [18]. 3.1.3 Most of the top - tier fund managers saw an increase in scale - In H1 2025, 67 fund managers had positive scale growth, with 16 managers having a scale increase of over 10 billion yuan and 28 managers over 5 billion yuan. Among the 21 top - tier managers, 14 had a net scale increase, mainly in Q2 [23]. - Index - type bond funds quickly replaced medium - and long - term bond funds as the focus of fund managers. Among the 15 fund managers with rapid scale growth in Q2, index - type bond funds contributed 250.4 billion yuan, accounting for over 50% [2][28]. 3.2 By type, the scale growth of index funds was significantly beyond the seasonal trend 3.2.1 Index bond funds: credit - based ones had explosive growth, and interest - rate based ones had a recovery - In Q1 2025, due to the seasonal effect, the scale of index - type bond funds decreased by 92.6 billion yuan. In Q2, the scale increased by 308.3 billion yuan, reaching the highest level since 2019 [33]. - Credit - bond index funds grew rapidly, with a net increase of about 220 billion yuan in Q2, and their proportion in index - type bond funds rose from 12% at the end of Q1 to 24%. Policy - financial bond index funds had a recovery, but their proportion decreased from 71% to 60% [35]. 3.2.2 Medium - and long - term bond funds: the equilibrium and interest - rate styles grew in scale, while the credit style declined - The medium - and long - term bond fund market was first depressed and then rebounded in H1 2025. The scale decreased by 394.6 billion yuan in Q1 and rebounded by 275.1 billion yuan in Q2 but did not fully recover the losses in Q1 [48]. - There was a significant style rotation in H1 2025. In Q1, funds flowed into credit - style products, while in Q2, the equilibrium and interest - rate styles grew, and the credit style shrank. The main reason was the active adjustment of the holding structure of existing funds [48][49]. 3.2.3 Short - term and medium - short - term bond funds: ended three consecutive quarters of scale reduction - In Q2 2025, the scale of short - term and medium - short - term bond funds rebounded, ending the downward trend since Q3 2024. The scale of short - term bond funds increased by 17.1% to 545.5 billion yuan, and that of medium - short - term bond funds increased by 18.5% to 600.5 billion yuan [59]. 3.3 Appendix: Fund classification method - For the selection of the fund list each quarter, start from the initial funds of bond - type funds in the Wind first - level classification and partial - debt hybrid funds in the second - level classification. Eliminate funds that do not meet the requirements to ensure that they are pure - bond funds [67]. - Classify short - term and medium - short - term bond funds based on the full - name matching of fund products, investment scope, performance comparison benchmark, and weighted duration of heavy - position bonds. Classify medium - and long - term bond funds according to the bond - holding situation in the quarterly report and assign style labels [68].