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Fortune
Fortune
Eleanor Pringle

Debt hawks worried when lenders to the U.S. would start demanding higher interest to offset risk—Moody’s top economist says the time is nigh

A view of a bus shelter at 18th and K St's NW where a poster and electronic billboard displays the current U.S. National debt per person and as a nation at 40 Trillion dollars on August 30, 2026 in Washington, DC. (Credit: Jemal Countess—Getty Images for the Peter G. Peterson Foundation)

Policy optimists have long waved off concerns about a fiscal crisis in the U.S.: the moment at which the debt burden would grow so large that it would be either impossible to finance repayments or would require economic consequences. The national debt burden now stands at more than $40 trillion, but the U.S. remains the largest economy on the planet—why worry?

Borrowing advocates also suggest that interest rates are elevated across many markets; the U.S. isn’t alone in relatively higher rates and therefore does not stand out as a cause for concern.

But Moody’s top economist, Mark Zandi, believes he is seeing the first signs of discomfort in the Treasury market. He also says that while many nations will have to wrangle with their borrowing burdens, the scale of the U.S. economy means its situation is “far and away the most important one.”

Zandi isn’t an outlier in his outlook. For many years, debt hawks (those concerned about the eye-watering levels of government borrowing) have warned that just because no crisis has happened yet, it doesn’t mean it won’t happen at all. Their concern is not necessarily the value of public debt, but rather the country’s debt-to-GDP ratio.

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