US Treasury yields across key tenors rose sharply in September 2026, with the 10-year yield surpassing 5.21% on September 24, its highest level in 19 years, exceeding the prior September 18 high of 5.01%. [1]
The 10-year yield crossed above 5% on September 15 for the first time since July 2007, reaching an intraday high of 5.041% before settling at 5.016% post-FOMC, marking a significant breach of a long-standing threshold. [2][3]
Earlier in September, the 10-year yield approached but did not breach the 5.00% threshold on September 11, closing at approximately 4.97%, the highest level since January 2025, after surging from around 4.78% in early September driven by hot CPI data, a Saudi pipeline attack, and global tightening read-through. [4][5][6]
On September 16, post-FOMC, the 10-year yield was 5.016% and the 2-year yield was approximately 4.70%, reflecting continued upward pressure across the curve. [7][8]
The 20-year Treasury auction on September 15 achieved a yield of 5.42%, the highest since January 1986, while the 30-year yield reached its highest level since 2004 on September 24, indicating broad-based yield increases across longer tenors. [9][10]
Market re-pricing for a September interest rate hike scenario was driving upward pressure on yields as early as August 21, with the 10-year yield in the 4.706–4.737% range, up from approximately 4.63% the prior Friday, amid global bond selloffs and inflation fears. [11][12][13]