长期殖利率持续攀升的背后，是市场对美国财政状况恶化的担忧日益加剧。自2007年以来，美国国债市场从4.5兆美元膨胀至31兆美元，债务占GDP比率翻倍超过100%，年度利息支出已突破1兆美元。与此同时，超过5000亿美元的人工智慧基础设施融资涌入企业债市场，进一步加剧了对债券买家的竞争，令人联想到1980年代「债券义警」迫使政府维持财政纪律的时代。
多位资深投资经理认为，5%以上的殖利率水准可能将持续存在，不同于过往类似的短暂飙升。知名长期债券多头Hoisington投资管理公司已放弃其数十年来的看涨立场，而先锋资本管理的投资组合经理指出，养老基金和保险公司等传统30年期国债买家如今拥有更多投资选择。彭博策略师认为，30年期国债殖利率正将5%从天花板转变为地板，下一个目标为5.5%。
The US 30-year Treasury yield has stayed above 5% for 27 trading days in 2026, including 12 consecutive sessions, marking the longest stretch since 2007. Notably, the Federal Reserve's benchmark rate is currently 150 basis points lower than in 2007, indicating that investors are demanding significantly greater compensation for holding long-duration government debt amid concerns over rising national debt and persistent inflation.
The sustained climb in long-dated yields reflects deepening anxiety over America's deteriorating fiscal outlook. The Treasury market has swelled to $31 trillion from $4.5 trillion since 2007, with debt-to-GDP surpassing 100% and annual interest costs exceeding $1 trillion. Compounding the pressure, over $500 billion in corporate financing tied to artificial intelligence infrastructure is competing for the same pool of long-end debt buyers, drawing parallels to the 1980s-era bond vigilantes who punished fiscal excess by driving yields higher.
Leading investors believe yields above 5% may be structural rather than transient. Hoisington Investment Management, a decades-long bond bull, recently capitulated, citing larger fiscal deficits and higher capital demand. Vanguard's senior portfolio manager noted that traditional long-bond buyers such as pensions and insurers now have a wider menu of alternatives. Bloomberg strategists suggest that 5% is becoming a floor rather than a ceiling for the 30-year yield, with 5.5% as the next likely target, while money managers increasingly favor shorter maturities to limit exposure to a potential debt-induced selloff.