30-Year Treasury Yield Touches a 19-Year High as US Debt Approaches $40 Trillion

The yield on 30-year U.S. Treasury bonds reached a 19-year high of 5.3% on Tuesday, marking the highest level since 2007. This surge occurred amid a global bond selloff and concerns over stalled negotiations to end the conflict with Iran, fears of persistent inflation, uncertainty over monetary policy under the new Federal Reserve Chair Kevin Warsh, and mounting worries about the U.S. national debt, which is projected to exceed $40 trillion.

Investors are now considering the prospect of a prolonged closure of the Strait of Hormuz and potential increases in oil prices, but they are also requiring higher yields due to the government's increasing borrowing needs. Dan Coatsworth, the head of markets at AJ Bell, pointed out that rising long-dated bond yields can stem from concerns over excessive government borrowing and the need for greater compensation from investors for holding such bonds.

Following a surge in the U.S. deficit to $432 billion in July, two recent Treasury auctions saw yields hit multi-year highs. The $42 billion 10-year note auction cleared at a 4.68% yield, the highest in 19 years, while the 30-year bond auction drew a yield of around 5.22%, the highest since 2021.

Anthony Saglimbene, chief market strategist at Ameriprise Financial, highlighted that investors are increasingly concerned about the growing U.S. debt and the government's lack of fiscal responsibility. Large-scale Treasury auctions provide an opportunity for the bond market to challenge the government's deteriorating financial situation, as they seek higher yields to ensure the successful completion of these auctions.

The competition from companies issuing debt to fund the AI investment boom is also playing a role in driving up yields, as investors demand better returns when both governments and corporations are vying for the same pool of buyers. Ed Yardeni of Yardeni Research noted that global worries about inflation and fiscal outlook are not limited to the United States, with longer-dated bonds in countries like Japan, Germany, and France also hitting multi-year highs.