The 10-year U.S. Treasury yield rose above 5% this week, reaching its highest level since 2007 and moving well above the Congressional Budget Office's earlier projections for borrowing costs over the coming decade. The rise is tightening financing conditions for companies, households and the government while directly increasing the interest bill on roughly $40 trillion of federal debt.
The 10-year yield has moved above CBO estimates
In its long-term outlook published in February 2026, the CBO projected that the 10-year Treasury yield would average about 4.1% this year and 4.2% in 2027. It expected the rate to remain near 4.3% from 2028 through 2031 before rising to roughly 4.4% between 2032 and 2036. Those estimates were issued before the war involving Iran pushed up oil prices and altered market expectations for inflation.
The yield has now exceeded 5%, well above the CBO's baseline estimates for this year and the years ahead. That implies the U.S. government may face higher interest costs when it issues new debt or refinances maturing securities. The 10-year Treasury yield also serves as a key reference rate for other forms of borrowing, so its move is transmitted across bond markets, housing finance, corporate credit and government funding.
An end to the war involving Iran and a decline in energy prices could ease some inflation pressure and create room for yields to fall. Energy markets, however, are not the only force pushing rates higher. U.S. economic growth remains relatively strong, the labor market is still tight, and part of the increase may reflect a return from the unusually low interest-rate conditions seen during the crisis period.
$40 trillion debt stock raises fiscal exposure
U.S. federal debt has reached roughly $40 trillion, while the annual budget deficit is about $2 trillion, with no clear near-term improvement. The larger the debt stock, the more directly changes in interest rates affect government spending. New issuance and refinancing can both bring higher market yields into the Treasury's interest bill.
The United States is not the only borrower competing for funding in the bond market. Other heavily indebted countries and large artificial-intelligence infrastructure companies are also seeking capital from global bond investors. To ensure sufficient demand at Treasury auctions, the U.S. government may have to offer more attractive yields.
War, trade tensions and natural disasters have also become more frequent in recent months. Markets are increasingly treating these shocks not simply as isolated events, but as part of a longer-term deterioration in global stability. If investors demand a higher return as compensation, the cost of financing U.S. debt could rise further.
Annual interest bill could reach $2.7 trillion
The Committee for a Responsible Federal Budget estimates that if yields remain more than 80 basis points above baseline projections, annual U.S. interest payments could reach $2.7 trillion by the end of the 2020s. That would exceed federal Medicare spending and also surpass retirement benefits paid through Social Security.
CRFB president Maya MacGuineas said the central concern is the feedback loop between debt and interest costs. Higher interest payments widen the deficit, a larger deficit requires additional borrowing, and that borrowing can accelerate the growth of the debt. In her view, a fiscal crisis that once seemed difficult to imagine has become a possibility that requires serious consideration.
Ed Yardeni revisits his “bond market police” view
Market veteran Ed Yardeni previously argued that 4% to 5% yields could still be considered normal for an economically strong United States. He coined the phrase “bond market police” to describe investors who sell Treasuries and push yields higher to signal dissatisfaction with large fiscal deficits.
As yields continued to rise over the summer, Yardeni initially concluded that the market had not yet seen a collective reaction from those investors. His assessment is now changing. In a report published on Tuesday, he wrote that discussion of a debt crisis would only be warranted if the bond market were genuinely worried about one. The market, he said, is now beginning to worry that the 10-year Treasury yield could break through the key 5% threshold.
The 10-year yield has risen by about 1 percentage point since late February, before the war involving Iran began, and has climbed roughly 0.5 percentage point in just the past two months. Such a rapid move makes it more difficult to attribute the trend solely to the normalization of rates following an economic recovery.
Jared Bernstein points to mounting fiscal pressure
Jared Bernstein, who previously chaired the Council of Economic Advisers, has also adopted a more cautious tone in discussing U.S. debt. He said he had not been part of the “alarmist” camp on debt for many years and had even criticized calls for tougher budget austerity.
But rising interest rates, the scale of the fiscal deficit and the lack of political will in both parties to address the problem have changed the calculation, Bernstein said. He wrote that he could not identify the exact day on which the risk would materialize, but that the United States was moving closer to that point. The speed of that approach, he added, was concerning even to someone who had not previously favored creating alarm.
For markets, the key questions remain whether yields can return to lower levels, whether energy prices and inflation will cool, and whether the U.S. deficit can improve materially. Until those factors show a clear shift, a 10-year Treasury yield above 5% will continue to feed into the government's future interest bill through debt refinancing and new issuance.