2026年1月6日利率债观察：为何央行只购入500亿国债？

1. Report Industry Investment Rating - No investment rating for the industry is provided in the report. 2. Core Viewpoints - Prudent control of the scale of bond net - buying is the most appropriate approach at the initial stage of restarting bond purchases to avoid the superposition and resonance of the two channels affecting bond yields [1][3] - The ideal state is that investors treat information on treasury bond trading operations like daily open - market reverse repurchase operations, and the central bank can flexibly use open - market treasury bond trading tools to inject base money and adjust bank - system liquidity without overly affecting bond yields [4] 3. Summary by Relevant Catalogs Why did the central bank only purchase 50 billion yuan of treasury bonds? - On January 5, 2026, the People's Bank of China announced the liquidity injection situation of the central bank's various tools in December 2025, showing a net liquidity injection of 50 billion yuan through open - market treasury bond trading tools. Compared with the monthly net purchases of 100 - 300 billion yuan from August to December 2024, the monthly net purchases of 20 - 50 billion yuan since the restart of treasury bond trading in October 2025 are relatively small. Prudent control of the purchase scale is appropriate in the initial months after restarting bond purchases [1] Impact of open - market treasury bond trading on bond yields - Open - market treasury bond trading affects bond yields through two channels. The asset - liability - sheet channel is that the central bank's trading of treasury bonds changes market supply - and - demand relations, and the expected channel is that investors trade on the information of the central bank's treasury bond trading, increasing the volatility of bond yields. The decline in yields largely comes from the expected channel [2] Measures to suppress the impact of the expected channel - The way to suppress the second channel is to dilute investors' attention to the central bank's bond purchases and weaken the relationship between the central bank's bond purchases and yields. At the beginning of restarting bond purchases, it is necessary to control the scale of bond net purchases to avoid the superposition of the two channels. When the market no longer overly focuses on the central bank's bond - purchase scale, the central bank can gradually increase the scale [3]