Bonds and cash income · Analysis
TIPS breakeven inflation: why it is not a guaranteed CPI forecast
Compare nominal and inflation-linked Treasury yields carefully. Breakevens reflect pricing and other premia, rather than a certain future inflation rate.
The question in a changing rate environment
Inflation headlines often describe the gap between nominal Treasury yields and TIPS real yields as a market expectation. This dated analysis does not quote today’s breakeven or forecast an official CPI result. It explains why a useful pricing comparison still requires attention to maturity, liquidity, risk compensation, and the specific security terms.
Start with matched instruments
Compare similar maturities and measurement times before interpreting a gap. TIPS principal adjustments and nominal Treasury cash flows differ, while both have market-price sensitivity. An investor’s result also depends on purchase price, holding period, tax treatment, and fees. A comparison assembled from different days or maturities can create an apparent signal that reflects the mismatch instead.
A simplified pricing scenario
With invented yields of 4.5% nominal and 1.5% real, simple subtraction gives a three-percentage-point gap. A compounded comparison gives 1.045 / 1.015 − 1, about 2.96%. These figures are illustrative. Neither calculation removes all market premia or establishes exactly what the next inflation release, or every year through maturity, will show.
Use the measure with its limits
Breakevens can organize a discussion of market pricing without becoming a certainty. Our TIPS fund analysis shows why inflation adjustment and price risk coexist. If evaluating a security, examine its actual terms and cash needs. A market-implied number does not automatically describe the buying-power change of your own expense basket.