信用策略系列：扩容在即，再看科创债ETF

Group 1 - The core viewpoint of the report highlights the significant growth of the first batch of 10 Sci-Tech Bond ETFs, which reached a total scale of over 120 billion yuan, increasing by more than 90 billion yuan since their launch [1][9][12] - The report notes that the trading volume of some Sci-Tech Bond ETFs has decreased to below 10% since the end of July, but has recently rebounded as the market stabilizes [1][16] - The weighted duration of the bonds held by the 10 Sci-Tech Bond ETFs ranges from 3.20 to 4.74 years, indicating a relatively long duration compared to the initial listing [23][24] Group 2 - The report identifies the most heavily held component bonds, with issuers such as State Power Investment Group and China Railway Corporation having holdings exceeding 3 billion yuan [2][32] - Other notable issuers with holdings between 2 to 3 billion yuan include China Ordnance Industry Group and China National Building Material [2][32] - The report provides a detailed breakdown of the holdings of the top 50 component bonds, indicating a concentration in the 1-3 year and 3-5 year maturity ranges [33][35] Group 3 - Since July, the credit bond yields and credit spreads have shown a "W-shaped" trend, with component bonds experiencing significant valuation changes compared to non-component bonds [3][36] - In the early July period, the demand for building positions in the newly launched Sci-Tech Bond ETFs led to a rapid decline in the valuations of component bonds, which outperformed non-component bonds by approximately 10 basis points [3][38] - The report notes that during the adjustment phase, the short-term component bonds reacted most significantly to market changes, while the 1-3 year and 3-5 year component bonds showed higher volatility during recovery periods [3][43] Group 4 - The upcoming issuance of the second batch of Sci-Tech Bond ETFs is expected to further benefit the valuation of component bonds and compress spreads, as current valuations present a better cost-performance ratio compared to mid-July lows [4][30] - The report suggests that there may be limited room for further compression in valuations for high-rated individual bonds, with an estimated potential of 14-15 basis points [4][30] - From an investment perspective, the report advises early positioning in component bonds to avoid the trap of trying to capture the last few basis points during market fluctuations [4][30]