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Long‑Term U.S. Treasury Yields Reach Multi‑Decade Highs

The surge in long yields reflects persistent inflation, heavy Treasury and corporate borrowing for AI projects, and market bets on more Federal Reserve rate increases.

Overview

  • On Thursday, Sept. 24, 2026, the 10‑year Treasury topped 5% and the 30‑year pushed to about 5.44%, marking levels not seen in roughly two decades.
  • Investors say four main forces drove the move: stronger U.S. growth, rising energy prices that keep inflation high, large federal debt sales, and heavy long‑term corporate issuance tied to AI and data‑center buildouts.
  • Higher Treasury yields are feeding directly into consumer costs, with the average 30‑year fixed mortgage near 7% and borrowing becoming more expensive for homebuyers and businesses.
  • The rise raises U.S. interest costs and pressures fiscal forecasts as new debt is priced at much higher rates, and it is forcing investors to revalue stocks and other risk assets worldwide.
  • Watch for further Fed decisions and continued supply from Treasuries and tech issuers, since small targeted buybacks are unlikely to stop a broader, global repricing of long‑duration rates.