US 30-Year Treasury Yield Hits 19-Year High Amid Debt Worries

The yield on benchmark 30-year Treasury bonds touched a fresh 19-year high of 5.3% on August 18, 2026, before pulling back slightly. This surge comes amid global bond selloffs and concerns about inflation, monetary policy under new Federal Reserve Chair Kevin Warsh, and US borrowing that has the national debt poised to hit $40 trillion.

Investors are factoring in a longer-term closure of the Strait of Hormuz and higher oil prices, demanding higher yields as the US government borrows more. 'Rising long-dated bond yields are not driven solely by expectations of higher interest rates and inflation fears,' said Dan Coatsworth, head of markets at AJ Bell.

The recent deficit surge to $432 billion in July has drawn attention to Treasury auctions, where yields have reached long-term highs. A sale of $42 billion in 10-year notes cleared at a high yield of 4.68%, the highest in 19 years, while the most recent 30-year bond auction drew a yield of roughly 5.22%, the highest since 2021.