Breakeven Inflation Rate (BEI) — The Bond Market's Inflation Outlook
How much does the market expect prices to rise going forward? Surprisingly, a hint of the answer is contained in the rate difference between two kinds of bonds.
Definition of BEI
The Breakeven Inflation Rate (BEI) is the 'nominal government bond yield' minus the 'inflation-linked bond (TIPS) yield' of the same maturity.
BEI = nominal government bond rate − inflation-linked bond (TIPS) rate
A nominal government bond pays a fixed interest but does not compensate for the rise in prices, while an inflation-linked bond has its principal and interest grow by however much prices rise. The rate difference between the two bonds becomes a proxy for the 'average inflation rate the market expects.' It is also called the 'breakeven inflation.'
How to read it
The Federal Reserve Bank of St. Louis's FRED calculates and publishes the '10-year BEI (T10YIE),' the 10-year nominal government bond rate minus the 10-year TIPS rate, every day.
For example, if the BEI is 2%, it is interpreted to mean the market sees prices rising by an average of about 2% a year over the next 10 years. For reference, as of mid-July 2026 the 10-year BEI was observed at around 2.2%, and this value changes daily.
If the BEI rises, the market's inflation expectation has increased; if it falls, it has decreased.
Points to watch — it is not a pure expectation
The BEI is useful but has a few limits.
First, the BEI has an 'inflation risk premium' mixed in. The extra compensation investors demand for price uncertainty is included, so it can come out slightly higher than pure expected inflation.
Second, inflation-linked bonds trade less than nominal government bonds, so they are also affected by a liquidity premium. When the market is unstable, this distortion grows larger.
Therefore the BEI is merely 'one window into the market's inflation expectations,' not a forecast that precisely predicts future prices. You should look at it together with other indicators such as survey-based expected inflation.
The BEI has inflation risk and liquidity premiums mixed in, so it differs from pure expected inflation. The mentioned figure of about 2.2% is a reference value from mid-July 2026 and changes daily. This article does not predict or make definitive claims about future prices or interest rates.
Frequently Asked Questions
Q. If the BEI rises, do prices necessarily rise by that much?
No. The BEI is only a proxy for the average inflation rate the market 'expects'; it does not guarantee actual prices. On top of that, risk and liquidity premiums are mixed in, so it differs even from a pure expectation.
Q. Where can I see the BEI?
In the U.S. case, the Federal Reserve Bank of St. Louis's FRED publishes the 5-year and 10-year BEI daily. It is calculated from the rate difference between nominal government bonds and inflation-linked bonds (TIPS), and the value changes every day.
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