Real yields explain almost all of the 10-year Treasury's rise to 5.00% in a year

The 10-year Treasury yield stood at 5.00% on October 26, up 0.99 percentage point from 4.01% on October 23, 2025, according to the US Treasury's daily yield curve. The Treasury's real yield curve, which strips out expected inflation, shows that 0.95 percentage point of the rise came from the inflation-adjusted yield (both computed).

What happened

The Treasury publishes two daily curves: nominal yields on Treasury securities, and real yields taken from inflation-protected securities (TIPS). The 10-year nominal yield minus the 10-year real yield is the breakeven rate, the average annual inflation that would leave a holder of either security equally well off. The Treasury does not publish it directly; the St. Louis Fed does, as a daily series built from the same two yields.

On October 23, 2025 the 10-year nominal yield was 4.01% and the real yield 1.71%, which puts the breakeven at 2.30% (computed). On October 26, 2026 the nominal yield was 5.00%, the real yield 2.66% and the breakeven 2.34%. Over the 12 months the nominal yield rose 0.99 percentage point, the real yield 0.95 percentage point and the breakeven 0.04 percentage point (all computed).

Shorter maturities moved too: the 2-year nominal yield was 4.68% on October 26, up 1.20 percentage points from 3.48% a year earlier, and the 3-month yield was 4.22%, up from 3.95% (computed). The Treasury's real yield curve starts at 5 years, so the split between real yield and breakeven is shown for 5 years and longer.

The pattern held over shorter spans too. From March 31 to June 30 the 10-year nominal yield rose 0.14 percentage point, the real yield 0.20 and the breakeven fell 0.06. From August 31 to September 30 the nominal yield rose 0.54 percentage point, the real yield 0.49 and the breakeven 0.05 (all computed).

The same split holds along the curve. The 5-year nominal yield rose 1.23 percentage points, to 4.84% from 3.61%, while the real yield rose 1.18 percentage points, to 2.37% from 1.19%. The 30-year nominal yield rose 0.73 percentage point, to 5.31% from 4.58%, and its real yield rose 0.71 percentage point, to 3.07% from 2.36% (all computed).

Why it matters

A nominal yield is the sum of two parts: the real return a lender asks for and the inflation the market builds in. A rise in the real part makes borrowing more expensive after inflation, which is why the split matters. FinanceInTime has reported on the 5-year TIPS auction and on demand at recent Treasury auctions.

Consumer prices have risen faster than the breakeven suggests. The Bureau of Labor Statistics said the all items consumer price index rose 3.7% in the 12 months to September, after 3.4% in the 12 months to August, and 2.6% excluding food and energy. The energy index rose 20.4% over the year. The 10-year breakeven of 2.34% is 1.36 percentage points below the 3.7% current inflation rate (computed). The two measure different things, since the breakeven covers a 10-year horizon and the CPI figure a single year, and the data do not show why they differ.

The Federal Reserve raised its target range for the federal funds rate on September 16 by 1/4 percentage point to 3-3/4 to 4 percent, in a 12-0 vote. Its statement said that "inflation remains elevated" and that the action "will support a timelier return to the Committee's 2 percent goal." The effective federal funds rate, a daily rate published by the New York Fed, was 3.63% on September 16 and 3.88% on September 30, according to FRED data.

The numbers behind it

The 10-year real yield rose from 1.71% to 2.44% by August 31, then to 2.68% on September 16 and 2.93% on September 30. It peaked at 2.95% on October 5, when the nominal yield peaked at 5.31%, and has eased since. The nominal yield has fallen 0.29 percentage point from its September 30 level, the real yield 0.27 percentage point and the breakeven 0.02 percentage point (all computed).

Date	10-year nominal yield	10-year real yield	Breakeven (computed)
October 23, 2025	4.01%	1.71%	2.30%
January 2, 2026	4.19%	1.94%	2.25%
March 31, 2026	4.30%	2.00%	2.30%
June 30, 2026	4.44%	2.20%	2.24%
August 31, 2026	4.75%	2.44%	2.31%
September 30, 2026	5.29%	2.93%	2.36%
October 26, 2026	5.00%	2.66%	2.34%

Source: US Treasury daily nominal and real yield curve rates. Breakeven is the nominal yield minus the real yield.

The breakeven stayed between 2.24% and 2.36% on every date in the table. The real yield rose on each successive date until September 30.

What the data do not show

The Treasury data record levels, not reasons. They do not say whether the rise in real yields reflects expectations for the Fed's policy rate, the supply of Treasury debt or demand for it, and no source opened for this analysis assigns a cause. What the data do establish is where the move sits: in the real yield, not in the breakeven.

The breakeven is also a derived measure, computed here from two published yields, and the Treasury does not present it as a forecast of inflation.

What to watch

The Fed's policy meeting runs on October 27 and 28, according to its calendar. The Bureau of Economic Analysis lists the advance estimate of third-quarter gross domestic product and September's personal income and outlays, which includes the PCE price index, for October 29 at 8:30 a.m. ET, on its release schedule.

If the breakeven stays near 2.3% while the real yield moves, the split described here would continue to hold; if the breakeven rises toward the 3.7% consumer price rate, more of any further move in the nominal yield would come from inflation compensation. Both depend on data not yet released.