日本超长期国债止跌，但真正的考验在本周三

Core Viewpoint - Japan's bond market is facing a structural crisis despite a temporary technical rebound in long-term bond yields, particularly the 30-year and 40-year bonds, which saw a decline of 7 basis points to 3.029% [1][4]. Group 1: Market Dynamics - The recent sell-off has pushed the yields of 30-year and 40-year bonds to their highest levels since issuance, indicating a significant market stress [4][5]. - The upcoming auction of 40-year bonds is critical; weak demand could lead to further yield increases and exacerbate the selling cycle, while strong demand may provide temporary stability [4][5]. Group 2: Supply and Demand Imbalance - There is a pronounced steepening of the yield curve in Japan, exacerbated by the central bank's significant reduction in bond purchases, with traditional buyers like life insurance companies failing to fill the gap [5]. - Japanese life insurance companies reported a more than doubling of domestic bond investment losses in the last fiscal year, highlighting the growing supply-demand imbalance [5]. Group 3: Policy and Market Sentiment - The Bank of Japan's Governor has not indicated any plans to intervene in the bond market, contributing to increased market volatility and uncertainty [5]. - The outcome of the 40-year bond auction is seen as a crucial test of market demand, with potential implications for future market stability [5].