Breakeven Inflation
Market-implied inflation expectation: the inflation rate at which the nominal Treasury and the comparable-maturity TIPS would deliver the same real return. Approximated by the nominal-minus-real yield difference.
When to use: Use as the cleanest market read on inflation expectations. The 10-year breakeven (10y Treasury yield − 10y TIPS yield) is a daily-quoted indicator of market-priced inflation, watched closely by bond and Fed-policy traders.
Formula
Variables
| Symbol | Name | Description | Unit |
|---|---|---|---|
| BreakevenInflation | Breakeven Inflation | Market-implied inflation expectation, as a decimal | % |
| TreasuryYield | Treasury Yield | Risk-free benchmark yield as a decimal | % |
| TIPSYield | TIPS Yield | Real yield on inflation-protected security, as a decimal | % |
Real-Life Examples
Example 1: 10y Treasury vs. 10y TIPS
10y nominal Treasury yields 4.50%; 10y TIPS yields 2.00%.
Given
Step-by-Step
10y breakeven inflation is 2.45% (or 2.50% by the simple-subtraction approximation). The market expects average annual CPI of about 2.5% over the next decade — a key real-time indicator for monetary-policy and asset-allocation decisions.
Frequently Asked Questions
Because it embeds an inflation risk premium (compensation for inflation uncertainty) and a TIPS liquidity premium (TIPS are less liquid than nominal Treasuries, so demand a yield premium). Breakeven typically overstates expected inflation by ~25-50 bps in normal times.
Daily by Fed officials, fixed-income traders, and macro investors. The 5y5y forward breakeven (5-year inflation, 5 years from now) is a particularly clean read on long-term inflation expectations free of near-term noise.
Because nominal yields and real yields are both in the few-percent range, the (1+Nominal)/(1+Real) − 1 form differs from the simple subtraction by only a few basis points. Most market commentary uses the simple form.