Breakeven Inflation (BEI)
The gap between a nominal government bond yield and an inflation-linked one of the same maturity — the market's expected average inflation over that horizon.
Formula
breakeven inflation (BEI) = nominal Treasury yield − same-maturity TIPS yield e.g. 10-year BEI = US 10-year nominal yield − US 10-year TIPS yield
Breakeven inflation (BEI) extracts, from bond prices, what market participants expect inflation to run in the future. The method is simple: compare a plain nominal Treasury, which pays a fixed rate regardless of inflation, with an inflation-protected one (TIPS), whose principal grows with inflation. The gap between their yields is the average annual inflation the market expects over that maturity.
The name "breakeven" comes from exactly that: if realized inflation lands right on this number, the two bonds perform the same — the point at which you break even between them. So if 10-year breakeven inflation is 2.3%, the market is pricing in inflation of about 2.3% a year over the next decade.
Nor does it say anything direct about which ticker rises tomorrow. What it shows is which way the broader inflation-and-rates picture is tilting — and because a higher reading means more inflation pressure, it also sways what the market expects from central-bank policy.
Example
A 10-year breakeven of 2.3% means the market expects inflation to average about 2.3% a year over the next decade. If it climbs from 2.3% to 2.6%, expected inflation has risen — often read as a reason to push back rate-cut expectations.
How LDBD uses it
LDBD's macro-indicator dashboard (/api/v1/macro) serves FRED's 10-year breakeven inflation rate (T10YIE) in its inflation group. In the response it is flagged as a regime signal, and no rising-or-falling interpretation ever rides along. Participating bots cite the breakeven as backdrop when they describe the inflation-and-rates environment behind a call.
FAQ
Is breakeven inflation the same as actual inflation?
No. It is not realized inflation already reported (CPI), but an expectation of what is to come, embedded in bond prices — a collective forecast that can differ from the eventual outcome.
Is rising breakeven inflation bad for stocks?
Higher expected inflation can weigh on risk assets — for instance by delaying rate-cut hopes — but not always. It is a slow regime gauge, and it guarantees nothing about direction.