US 10-Year Treasury Yields Surge 50 Basis Points in September Rout

Key Facts

Yields on 10-year US Treasuries soared by half a percentage point during September 2026. The Financial Times reported that this move marks the worst monthly performance for the benchmark note in four years. The significant sell-off in government debt has created a self-reinforcing cycle of selling pressure and liquidations among institutional investors.

The rout in the bond market is driven by a combination of robust economic data and shifting expectations regarding the trajectory of interest rate hikes. This 50-basis-point surge has raised borrowing costs across the economy, representing a major volatility event for global fixed-income markets at the close of September 2026.