财政扩张与需求疲软双重打压！日本超长债收益率升至数十年高位

Group 1 - The yield on Japan's 20-year government bonds has risen to 2.655%, the highest level since 1999, while the 30-year bond yield has reached 3.185%, approaching historical highs since its introduction [1][2] - The fluctuations in bond yields are attributed to expectations of increased bond issuance following the ruling coalition's losses in the July Senate elections, exacerbating the pressure on already strained long-term bonds [1] - Ongoing inflation concerns are increasing pressure on ultra-long-term bonds, forcing the Bank of Japan to face greater interest rate hike pressures [1] Group 2 - Investor demand for Japanese government bonds is declining, with net purchases of bonds with maturities over 10 years by foreign investors dropping to 480 billion yen (approximately 3.3 billion USD) in July, only one-third of the June level [2] - The significant decrease in foreign net purchases raises concerns about potential volatility in the long end of the yield curve [2] - Recent increases in open interest in Japanese government bond futures indicate that aggressive traders are increasingly confident that the probability of an interest rate hike in October has shifted from 50% to fully priced in [2]