债券ETF跟踪：信用债类ETF规模降幅收窄

1. Report Industry Investment Rating - Not provided in the content 2. Core Viewpoints - Last week, the ChinaBond New Composite Index declined by 0.04% compared to before the Spring Festival; short - term pure - bond and medium - long - term pure - bond funds rose by 0.04% and remained flat respectively; the CSI AAA Sci - tech Innovation Bond Index and the SSE Benchmark Market - making Corporate Bond Index both rose by 0.05% [3] 3. Summary by Related Catalogs 3.1 Fund Flows - As of February 27, 2026, bond - type ETFs had a net outflow of 713 million yuan in the past week. Interest - rate, credit, and convertible - bond ETFs had net outflows of 520 million yuan, 1.466 billion yuan, and a net inflow of 1.273 billion yuan respectively. Among credit - type ETFs, short - term financing, corporate bonds, and urban investment bonds had net inflows of 1.837 billion yuan, 205 million yuan, and 94 million yuan respectively, while market - making credit bonds had a net outflow of 376 million yuan, and sci - tech innovation bonds had a net outflow of 3.225 billion yuan. Since 2025, interest - rate, credit, and convertible - bond ETFs have had cumulative net inflows of 56.529 billion yuan, 468.087 billion yuan, and 36.144 billion yuan respectively, with a total of 560.759 billion yuan [5] 3.2 Net Value Performance - Throughout the week, the net values of various types of bond ETF products generally rose. As of February 27, 2026, the 30 - year Treasury Bond ETF performed weakly, falling 0.67% for the week. The Treasury Bond ETF Dongcai and the National Development Bond ETF rose 0.04%. The Convertible Bond ETF and the SSE Convertible Bond ETF fell 0.23% and 0.48% respectively last week [6] 3.3 Performance of Credit Bond ETFs and Sci - tech Innovation Bond ETFs - As of February 27, 2026, the median unit net values of credit bond ETFs and sci - tech innovation bond ETFs were 1.0166 and 1.0043 respectively, rising 0.06% for the week. Among credit bond ETFs, Bosera Credit Bond ETF performed relatively well, rising 0.04% for the week. Among sci - tech innovation bond ETFs, Dacheng Sci - tech Innovation Bond ETF and Yongying Sci - tech Innovation Bond ETF performed relatively well. As of February 27, 2026, the median discount rate of credit bond ETFs was 19BP, and that of sci - tech innovation bond ETFs was 17BP [7] 3.4 Duration Tracking of Credit - type ETFs - As of February 27, 2026, the holding durations of short - term financing ETFs, corporate bond ETFs, and urban investment bond ETFs were 0.31 years, 1.92 years, and 2.01 years respectively. Among market - making credit bond ETFs, the median holding durations of products tracking the Shanghai Market - making Corporate Bond Index and the Shenzhen Market - making Corporate Bond Index were 3.49 years and 2.73 years respectively. Among sci - tech innovation bond ETFs, the median holding durations of products tracking the AAA Sci - tech Innovation Bond Index, the Shanghai AAA Sci - tech Innovation Bond Index, and the Shenzhen AAA Sci - tech Innovation Bond Index were 3.28 years, 3.20 years, and 3.09 years respectively [8]