Written and reviewed by Kevin Nerway · Last verified 29 September 2026
Key Takeaways
- The 10-year US Treasury yield reached a 19-year peak above 5.27%, climbing nearly 50 basis points in September during the heaviest monthly bond selloff in two years.
- Short-term paper faced intense selling pressure, with the 2-year Treasury yield advancing more than 57 basis points over the month to touch the 5.00% threshold.
- Federal Reserve policy expectations shifted hawkishly, with pricing now incorporating three additional rate hikes by mid-2027 due to sticky inflation and economic growth.
- Equity markets slipped broadly, pulling the Nasdaq down 0.9% overnight even as Nvidia cushioned losses by adding $150 billion to its share buyback program.
On September 29, 2026, global fixed income markets experienced a sharp repricing as the benchmark 10-year US Treasury yield spiked to a 19-year high above 5.27%. This rise represented a selloff of nearly 50 basis points through the month of September alone, marking the heaviest monthly decline in Treasury bond prices in two years. Simultaneously, short-term yields surged as the 2-year US Treasury yield shot up more than 57 basis points across September to test the critical 5.00% threshold. The catalyst behind this aggressive bond liquidation stems from market participants pricing in a prolonged high-rate regime, anticipating that resilient US economic growth and persistent inflation will force the Federal Reserve to deliver three additional rate hikes by mid-2027.
Treasury Yield Explosion: Deconstructing the September Rate Selloff
The violent selloff in sovereign paper has reset baseline borrowing costs across global financial markets. Because benchmark Treasury