US 30-year Treasury yields hit their highest level since 2004 as the sell-off deepens (September 24, 2026)

The U.S. bond market continues to face strong pressure, after the yield on 30-year Treasury bonds rose to its highest level in more than two decades, in the latest sign of a widening sell-off that is weighing on long-term bonds amid growing concerns about inflation and U.S. public finances.

 The yield on 30-year US Treasury bonds rose by as much as 4 basis points during trading on Thursday, to reach 5.44% , its highest level since 2004.

 This rise came after Brent crude prices climbed, while US bond yields across various maturities experienced a strong surge during the week, pushing yields to their highest levels since approximately 2007.

 The rise in yields reflects the decline in bond prices, as investors continue to sell long-term bonds or demand a higher return in exchange for holding them for periods of time that extend for decades.

 Inflation, energy, and government spending are putting pressure on bonds. Long-term bonds are under increasing pressure as several factors converge at once, most notably continued economic growth, rising energy prices, inflation fears, and increased US government borrowing.

 These factors are driving investors to demand higher compensation for locking up their money for 20 or 30 years, especially given the uncertainty surrounding the future path of inflation, the size of the national debt, and the United States’ financing needs. Ed El-Husseini, portfolio manager at Columbia Threadneedle, said that investors are now demanding significantly higher compensation for committing their money to 30-year bonds.

 The rise in 30-year bond yields coincided with a surge in Brent crude prices, adding another layer of inflation concerns. Higher energy prices can put downward pressure on price levels, making investors more cautious about long-term bonds, as higher inflation erodes the real value of future returns for bondholders.

 Therefore, the rise in oil prices is not just a development in the energy market, but its impact can extend to the bond market, interest rates, and expectations regarding monetary policy.

 The US government faces a more difficult equation: rising long-term yields present the US Treasury with an additional challenge, as higher yields mean higher borrowing costs when the government issues new debt or refinances existing debt.

 This comes as the Treasury Department seeks to lower long-term borrowing costs. In an effort to ease market pressures, the U.S. Treasury expanded its bond-buying program in mid-August, a move aimed at supporting liquidity and reducing market stress. However, the program’s impact has been limited so far, and it has failed to halt the continued rise in long-term bond yields.

 Long-term US Treasury bonds are not merely an investment tool; they are a key pricing benchmark in the global financial system. When the yield on 30-year US Treasury bonds rises to high levels, it significantly increases the cost of capital, impacting the valuation of stocks, real estate, and companies, and raising the cost of both government and private financing.

 Therefore, the continued rise in long-term yields could become one of the most important variables that markets will be monitoring in the coming period, especially if the increase is accompanied by continued rises in energy prices, inflation, and government borrowing. Currently, the bond market is sending a clear message: investors are demanding higher returns in exchange for taking on the risk of holding long-term US debt for decades, which is putting increasing pressure on the cost of long-term borrowing in the United States.