What the bond market reveals about Congress, the national debt and the middle class—and where America goes from here

The bond market is repricing the federal government's fiscal folly. Congress knows it can't touch the middle class and has no ideas about how to help them other than growing the debt–and it's headed for a bad outcome thanks to bond vigilantes. The 30-year Treasury yield closed at 5.62% on September 30, territory last seen in 2002 . The 10-year sits near 5.3%. The consequences for the budget are severe. Interest on the national debt reached $857 billion over the first nine months of the fiscal year, more than the government spent on Medicare or national defense. Before Washington responds, it should understand what the market is really saying.

One possible explanation is that investors are losing faith in the dollar. Gold has more than doubled in two years. Commentators talk of a "debasement trade," in which bondholders flee paper claims ahead of expected inflation. On this view, rising yields and record gold prices are two symptoms of the same disease: Uncle Sam printing dollars to cover its debt.

It's a tidy story, but other data disprove it. A bond yield has two components: expected inflation and the real, inflation-adjusted return. Comparing conventional Treasuries with inflation-protected securities lets us separate the two. The 30-year breakeven inflation rate, the market's long-run inflation forecast, sits near 2.3 %. That is unremarkable. The 30-year real yield, by contrast, has climbed above 3% , its highest level since before the 2008 financial crisis. Bondholders expect the dollar to hold its value tolerably well. What has changed is the real price of financing the government.

Supply and demand explain why The federal government is running deficits near $1.9 trillion , with the Congressional Budget Office projecting larger ones ahead. Meanwhile, private demand for capital is surging. The artificial-intelligence buildout requires enormous borrowing for data centers, chips, and electric power. Public deficits and private investment are competing for the same pool of savings. When the demand for savings outruns the supply, its price rises. That price is the real interest rate.

Some of this is good news. Real returns driven by productive investment indicate a growing economy. But deficits at this scale crowd out the very investment that raises future living standards. Worse, the arithmetic compounds. Higher yields raise debt-service costs, which enlarge deficits, which require still more borrowing at those same higher yields. A 3 percent long-term real yield means capital scarcity is binding again. Near-zero rates from 2008 to 2020 taught borrowers, Congress most of all, to treat capital as basically free. Those days are gone.