Overview
- Long-term U.S. Treasury yields climbed in mid‑August 2026, with the 30‑year around 5.22% and the 10‑year near 4.68%, the highest readings in decades and confirmed by recent large auctions.
- The move was driven by inflation that remains above target, with U.S. consumer prices at 3.4% in July, and a near $90 a barrel jump in Brent crude after US–Iran peace talks stalled, which lifted inflation expectations.
- Fiscal pressure is increasing supply that markets must absorb, as the Congressional Budget Office now projects a $2.1 trillion deficit for the year driven in part by a $250 billion tariff revenue shortfall.
- Market structure changes are amplifying price moves because official holders have stepped back and more price‑sensitive private buyers now dominate demand, and U.S. actions to support the yen reflected worries that foreign Treasury sales could push yields even higher.
- Higher long-term yields are already raising mortgage and corporate borrowing costs, which squeezes homebuyers, may slow business investment and hiring, and could force other central banks to reassess policy and global portfolio allocations.