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品浩 · Tiffany Wilding · 2026/08/26

宏观路标 | 回购、市场运作与国债可预测性

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宏观路标 | 回购、市场运作与国债可预测性

上周,美国财政部宣布将至少翻倍进行特定长期国债的回购,令债券市场感到意外。长期收益率最初下跌,但迅速逆转,引发许多投资者和观察人士质疑这是否意味着财政部的债务管理策略及其长期秉持的“定期且可预测”的发行原则将发生变化,该原则旨在实现美国政府借款成本最小化。

我们认为,回购有助于改善市场运作,并长期平均降低财政部借款成本,尤其是在财政部旨在将自己定位为新的“最后做市商”的情况下——美联储一直希望退出的角色。然而,财政部自身无法完全改变决定长期国债定价的基本面。事实上,正如我的同事们上周所写(PIMCO观点:“是什么推高了长期债券收益率?”),长期收益率上涨是全球性的,原因包括疫情后仍然庞大的财政债务负担、政策和通胀不确定性上升,以及最近与人工智能相关的企业大量发行债券。

重要的是,对于债券市场而言,财政部债务管理策略的稳定性是关键。1970年代对机会主义融资的成本和风险是一个警示。在“定期且可预测”的发行基础上,提供易于理解、稳定的流动性后盾,以防市场功能失常,这对市场应该是积极的。

目前,财政部在曲线5.2%年期点的融资成本为30,比同期限固定利率互换高出70 basis points基点(根据财政和彭博数据)。部分差异可以被解释为市场持有国债抵押品的“收费”利率。财政部有很大的空间通过增强市场流动性政策来压缩这一利率,从而为政府获得更好的融资水平。

了解财政部债务管理策略的一些背景和历史,包括回购,可能有助于澄清国债市场未来可能面临的情况。

Kenneth D. Garbade。《“定期且可预测”作为国债管理策略的出现》。纽约联邦储备银行经济政策评论(2007年3月)返回内容↩

美国财政部债务管理办公室。《美国财政部债务发行框架介绍》(19年11月2015日)返回内容↩

《关于最优债务发行的考虑》。财政部借贷咨询委员会(2025年11月)返回内容↩

完整英文原文

Last week, the U.S. Treasury Department surprised the bond market by announcing that it would at least double selected long-end bond buybacks. Long-term yields initially fell but quickly reversed, raising questions from many investors and observers about what this could mean for Treasury’s debt management strategy and its long-held view that “regular and predictable” issuance best serves its goals to minimize borrowing costs for the U.S. government.

Our view is that buybacks can help with market functioning and reduce Treasury borrowing costs on average over time, especially if Treasury aims to establish itself as the new “market maker of last resort” – a role that the Federal Reserve has wanted to step away from. However, Treasury by itself can’t completely alter the fundamentals that drive longer-term Treasury pricing. Indeed, as my colleagues wrote last week (PIMCO Perspectives: “What’s Pushing Long-Term Bond Yields Higher?”), longer-term yields have risen globally for several reasons, including still-large post-pandemic fiscal debt burdens, rising policy and inflation uncertainty, and, more recently, heavy AI-related corporate issuance.

Importantly, for the bond market, stability in Treasury debt management strategy is key. The 1970s are a cautionary tale for the costs and risks of opportunistic funding. Complementing “regular and predictable” issuance by providing a well-understood, stable liquidity backstop to guard against bouts of market dysfunction should be positive for the market.

Currently, Treasury funds itself at 5.2% at the 30-year point on the curve – that’s 70 basis points above the similar-maturity fixed-rate swap (according to Treasury and Bloomberg data). Part of the discrepancy can be interpreted as the rate the market “charges” to hold Treasury collateral. There is a lot of room for Treasury, through enhanced market liquidity policies, to compress that rate for better funding levels for the government.

Some background and history on Treasury debt management strategy, including buybacks, could help clarify what may lie ahead for Treasury markets.

Kenneth D. Garbade. “The Emergence of ‘Regular and Predictable’ as a Treasury Debt Management Strategy.” Federal Reserve Bank of New York Economic Policy Review (March 2007) Return to content↩

U.S. Treasury Department, Office of Debt Management, “Presentation of U.S. Treasury’s Debt Issuance Framework” (19 November 2015) Return to content↩

“Considerations for Optimal Debt Issuance.” Treasury Borrowing Advisory Committee (November 2025) Return to content↩

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关键论点
  • 回购有助于改善市场功能,并随时间平均降低美国国债的借贷成本,尤其是当财政部旨在成为‘最后做市商’时。
  • 财政部本身无法完全改变驱动长期国债定价的基本面。
  • 美国国债债务管理策略的稳定性至关重要;1970年代对机会主义融资发出警示。
  • 以稳定的流动性后盾补充‘常规且可预测’的发债策略应有利于市场。
风险
  • 国债回购计划可能无法有效压缩互换利差或降低借贷成本。
  • 不可预测或机会主义的债务管理可能导致成本上升和市场功能失调。
  • 财政债务负担、政策不确定性以及大量企业发行等基本面因素可能使长期收益率维持高位。