NEW YORK, Sept. 8, 2026 — The U.S. government is borrowing at a pace that is becoming more significant for financial markets. Federal deficits have remained around 6% of gross domestic product in recent years, while public debt has climbed to roughly 100% of GDP. The scale of that borrowing is now showing up in the government's interest bill and in the yield investors demand to hold U.S. debt.

Interest payments on U.S. government debt have more than doubled over the past five years to more than 3% of GDP, a record level for the country and the highest among major developed economies. At the same time, the yield on the 10-year Treasury has moved to about 4.8%, bringing the 5% level into view.

Federal Borrowing Takes on Greater Weight

The federal government has been running large deficits for years, but the size of those deficits now matters more because the debt stock is much larger. A deficit of roughly 6% of GDP means Washington continues to add substantially to its outstanding debt even without a major recession or financial crisis.

The interest bill is becoming another part of the equation. As existing debt matures and is replaced with new borrowing at higher rates, the government has to devote more money to interest payments. That leaves less room in the federal budget for other spending and makes future borrowing costs more important to the country's finances.

Treasury Yields Near a Critical Level

The 10-year Treasury yield is now close to 5%, a level that matters because it serves as a reference rate for borrowing across the U.S. economy. Mortgage rates, corporate bonds, and other forms of long-term financing are influenced by movements in Treasury yields.

A sustained move above 5% would therefore have consequences beyond government debt. Companies would face higher financing costs, while investors could earn higher yields on government bonds without taking on the risks associated with stocks or corporate debt. That can change how investors value companies and how businesses assess large capital projects.

AI Spending Adds to Capital Demand

The scale of AI investment is adding to the demand for capital. Companies are spending heavily on data centers, computing equipment, and other infrastructure, while revenue from AI-related businesses remains well below the amount being invested. That gap means major technology companies are relying more heavily on debt and other forms of external financing to fund their infrastructure spending.

Higher Treasury yields make that financing more expensive. Large technology companies have already become significant borrowers as they fund data centers and other AI projects, adding corporate demand for capital alongside the government's borrowing needs. If long-term rates remain elevated, some companies may have to reassess the cost and timing of major investments.

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What Higher Yields Mean for Business

The consequences of higher yields are not limited to the federal government or technology companies. More expensive credit can affect corporate investment, mergers and acquisitions, and the value investors place on future earnings. Recent market activity shows that higher rates are already making some transactions more difficult to finance.

The bigger question is whether Treasury yields remain below the rate of nominal economic growth. If borrowing costs eventually exceed the economy's growth rate, keeping the federal debt from growing relative to GDP becomes more difficult. For now, the U.S. economy continues to grow at a pace that gives policymakers some room, but a sustained move in the 10-year Treasury yield above 5% would mark an important change for both government finances and private-sector borrowing.