A financial television reports the 10-year Treasury yield to four decimal places every trading day. The number sounds precise, and in one sense it is. In another sense, that number is not the number that matters for almost any of the macro questions asked about it. The number that matters is the real yield — the nominal yield minus expected inflation — and confusing the two is at the root of most macro miscomprehensions.
The two definitions
The nominal yield is what a Treasury bond pays. If a 10-year note has a coupon of 4.5%, and inflation over its life turns out to average 2.5%, the bond holder earns a real return of 2%. If inflation turns out to average 4.5%, the real return is zero. If inflation turns out to average 6%, the real return is negative 1.5%.
The distinction matters because almost every decision made on the basis of interest rates is really a decision about the real rate, not the nominal one. A company deciding whether to borrow at 6% cares whether its revenue will grow with inflation; if it will, then 6% nominal with 4% inflation is really a 2% real cost of capital, which is a very different decision than 6% nominal with 1% inflation.
Where the real rate lives
The market publishes an implicit real yield through two instruments. Treasury Inflation-Protected Securities (TIPS) have their principal adjusted for CPI inflation, so their quoted yield is a real yield directly. The 10-year TIPS yield sits in the mid-to-high 1% range as of late 2026.
The gap between the nominal 10-year Treasury and the 10-year TIPS is the "breakeven inflation rate" — the market's implied forecast of average CPI inflation over the next ten years. A nominal 10-year at 4.4% and a TIPS 10-year at 1.7% implies a breakeven of 2.7%, meaning the market is pricing average inflation over the next decade at 2.7%.
Neither number is exactly the "true" real yield, because TIPS carry their own liquidity premium and CPI-adjustment lags. But the pair together is the cleanest read available on how the market is dividing nominal yields into their two components.
Why the Fed cares about real rates specifically
The Fed's policy target is a real interest rate — specifically, the real federal funds rate relative to its estimate of the "neutral" real rate. If the neutral real rate is 0.5% and current inflation is 2%, then neutral nominal fed funds is around 2.5%. Fed funds above that level is restrictive; below it is accommodative.
This is why current Fed policy is described as "restrictive" even though nominal fed funds is well below the peaks of the 1980s. Nominal fed funds is around 4.5%; inflation is around 2.5%; the real rate is about 2%. That real rate is above most estimates of neutral, which is what "restrictive" means in practice. In the 1980s, nominal fed funds sat above 15%, but inflation ran above 10%, so the real rate was often only modestly higher than today's — despite the enormous difference in the nominal number.
Where investors get this wrong
The most common error is comparing nominal yields across eras without adjusting for inflation. A 10-year Treasury at 4.5% today is not directly comparable to a 10-year Treasury at 8% in 1990, because inflation was 5% in 1990 and 2.5% now. The real yield in 1990 was about 3%; the real yield today is about 2%. The 1990 bond was more attractive on a real basis despite the lower headline number.
The same error appears in equity valuation. The "equity risk premium" is properly measured against the real yield, not the nominal one, because equity earnings tend to grow with inflation. Comparing forward earnings yields on stocks against nominal Treasury yields — a common shorthand in retail commentary — systematically overstates or understates the equity premium depending on the inflation environment.
What real yields tell you now
Real yields in the high-1% range on 10-year TIPS are historically normal — roughly the average of the pre-2008 era. What is unusual is that they are this high after fifteen years of much lower real yields (often negative in the 2010s). The shift from negative real rates to positive real rates is one of the most consequential macro moves of the decade, and its consequences are still working through valuations across asset classes.
The rule to internalise
When a headline quotes "the 10-year is at 4.4%," ask what the corresponding real yield is doing. If real yields are rising, the environment is tightening even if the nominal yield is flat. If real yields are falling, it is loosening even if the nominal yield is rising. The nominal number is what gets quoted; the real number is what actually moves the economy.
Educational content only. Not investment advice.