30-Year Treasury Yield Hits 5.33%, Highest Since 2007, on Fiscal and Inflation Fears

The yield on the 30-year U.S. Treasury bond surged to 5.33% on August 18, its highest level in 19 years, as investors grew increasingly alarmed by the deteriorating U.S. fiscal outlook and persistently elevated inflation. The 10-year yield hovered around 4.70%, near its highest since early 2025.

Pressure on long-term rates is being driven by a combination of factors: rising government debt, heavy Treasury issuance, and massive AI-related borrowing demand. The U.S. fiscal deficit in July hit its highest monthly total since March 2021, and the annual inflation rate remains well above the Federal Reserve's 2% target, compounded by higher oil prices tied to Middle East tensions. The 10-year forward rate, known as the 10y10y, has climbed above levels last seen before the 2008 financial crisis, prompting some analysts to argue that equity markets are absorbing the traditional role of bonds as long-duration yield instruments.

Government borrowing costs rose to multidecade highs globally as well. The 30-year yield pulled back slightly late in the session, trading around 5.285%, but the move reinforced a broader repricing of long-term risk in fixed income markets.