U.S. Debt Nears $40 Trillion as Yield Pressures Mount on Treasury Market

The U.S. national debt reached $39.9 trillion in mid-August and is on pace to pass the $40 trillion threshold following a sustained surge in federal spending and borrowing. Official Treasury Department data shows the government added $1.8 trillion in debt during the first 10 months of the current fiscal year, bolstered by $432 billion in net borrowing in July alone. The public and intragovernmental debt total highlights an expanding fiscal imbalance that is reshaping borrowing costs across fixed-income markets.

Bank of America Research chief investment strategist Michael Hartnett projects the national debt will reach $50 trillion by 2029. The persistent issuance of federal debt to fund deficits has created an environment where investors require higher yields to absorb government bond supply, driving the yield on 10-year Treasurys to 4.6% and pushing 30-year yields to 5.2%. Hartnett has urged investors to adopt an “Anything but Bonds” strategy, warning that long-duration government bonds remain particularly vulnerable to price erosion as yields adjust upward.

The acceleration in national debt has triggered a self-reinforcing debt feedback loop. The annual interest payments on U.S. government debt have climbed to approximately $1.4 trillion over the past year, requiring the Treasury to issue additional debt simply to cover its debt service obligations. When Treasury yields rise to clear new issuance, baseline interest rates throughout the real economy adjust higher, elevating the cost of corporate loans, consumer credit, and mortgages.

While rising interest rates offer higher income on newly issued bonds, existing long-duration Treasurys experience declines in market value due to their elevated sensitivity to rate adjustments. Hartnett maintains that the rotation away from long-term sovereign debt will persist until fundamental market conditions change, noting that his team expects the “Anything but Bonds” framework to stay relevant until five-year Treasury yields fall below roughly 3.25%.

In place of long-duration fixed income, Hartnett favors real and growth assets, including gold, equities, real estate, and biotech opportunities. Commenting on the structural divergence in asset pricing, Hartnett noted in a recent outlook report: “The U.S. stock market hit an all-time high on the same day that the U.S. Treasuries issued at their highest yield in 25 years. That’s reality.”