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Treasury Yields Jump to Multi‑Year Highs, Forcing Repricing of Fed Policy and U.S. Borrowing Costs

Oil-price shocks from the U.S.–Iran conflict have pushed long-term rates up, which could add billions to the federal interest bill and delay expected Fed rate cuts.

Signage is seen at the United States Department of the Treasury headquarters in Washington, D.C., U.S., August 29, 2020. REUTERS/Andrew Kelly/File Photo
The Dow just clinched back-to-back record highs. But higher Treasury yields are a fresh test for the stock market.
The US Treasury building in Washington, DC, US, on Tuesday, Aug. 5, 2025. The US government plans to borrow $100 billion in a single Treasury debt sale this week, an unprecedented figure that showcases both the magnitude of its borrowing needs and its ability to attract investors. Photographer: Al Drago/Bloomberg
A trader works at his desk on the floor of the New York Stock Exchange on May 19, 2026.

Overview

  • Bond markets have sold Treasuries since late February as the U.S.–Iran conflict tightened oil supply routes and pushed inflation expectations higher, lifting the 10-year yield into the mid‑4% range and the 30‑year above 5%.
  • President Trump’s May 20 comments that Iran talks were in their 'final stages' produced a short-lived Treasury rally, but yields remained materially higher by late May as markets weighed the deal’s durability.
  • Markets and major research houses have shifted away from priced-in Fed cuts toward a higher‑for‑longer view for interest rates with a rising chance of at least one hike by year‑end, compressing equity risk premia and raising borrowing costs.
  • Analysts warn that even if the oil shock eases, structural forces — growing public debt, higher neutral real rates, strong investment trends and central-bank policy shifts — could keep long-term real yields elevated.
  • Higher yields are already squeezing households and the government by raising mortgage and corporate borrowing costs and weakening short-term Treasury auction performance, which could add tens of billions to federal interest payments as debt rolls over.