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L.11 · ADVANCED · 3 MIN

Inflation Breakevens and TIPS Pricing: Reading the Real-vs-Nominal Spread

The most direct way the bond market expresses a view on future inflation is the 'breakeven' rate -- the gap between a nominal Treasury yield and a Treasury Inflation-Protected Security (TIPS) yield of the same maturity. Reading the breakeven correctly requires understanding what it actually measures, why it diverges from realized inflation, and what the TIPS liquidity premium does to the calculation. This is one of the most-mis-cited numbers in mainstream macro commentary.

Quiz · 5 questions ↓
§ 01
Breakeven Inflation = Nominal Yield - Real Yield (TIPS) [approximately]
§ 02

The breakeven is NOT a clean forecast of expected inflation. It is expected inflation MINUS the inflation risk premium (which nominal-bond holders charge for inflation-surprise risk, biasing breakeven UP from true expectation) PLUS the TIPS liquidity premium (which TIPS-bond holders charge because TIPS are less liquid, biasing TIPS yields UP and therefore breakeven DOWN from true expectation). The two adjustments partially offset, but the net direction varies by regime. Empirically, breakevens have understated realized inflation in many sample periods -- a feature, not a bug.

§ 03

TIPS coupon and principal payments are adjusted upward (or downward) by CPI inflation, so the TIPS holder receives a yield that is REAL -- protected against inflation. The market quote on a TIPS is the REAL yield (the yield the holder expects on top of inflation). A nominal Treasury yield includes expected inflation plus a risk premium. The breakeven mechanically backs out the difference. The structural soundness of the calculation depends on the assumption that the inflation index used (CPI) accurately captures the inflation the holder cares about -- a reasonable approximation for most uses but with known biases (CPI tends to overstate inflation for some categories, understate it for others).

§ 04

TIPS LIQUIDITY can vary materially across market regimes. During calm periods, TIPS trade with bid-ask spreads close to nominal Treasuries; during stress (notably March 2020 and parts of late 2022), TIPS liquidity dried up and TIPS yields became distorted upward as forced sellers had trouble finding bids. During those stress periods, the implied breakeven dropped to artificially low levels -- not because expected inflation collapsed, but because TIPS yields spiked on liquidity stress. Reading breakevens during stress periods requires the additional context of what was happening to TIPS-specific market microstructure.

§ 05
Pull up the current 10-year nominal Treasury yield and the 10-year TIPS real yield (both available on Treasury.gov or FRED). Compute the implied breakeven. Then check FRED for the time series of 10-year breakeven inflation (T10YIE series) to see how the current level compares to its historical range. A breakeven near 2.4-2.5% is roughly average for the post-2014 period; meaningful deviations from this range warrant attention.
§ 06

TIPS make the most sense for investors who care specifically about protecting purchasing power against unexpected inflation -- particularly retirees facing long horizons with fixed nominal income, and institutions managing inflation-linked liabilities (insurance companies, pension funds with COLA features). For investors in tax-advantaged accounts, TIPS allocations can be a sensible diversifier; in taxable accounts, the annual phantom-income tax on inflation accruals creates friction that often makes TIPS less attractive than nominal Treasuries at similar yields.

§ 07

Breakeven inflation = nominal yield - real (TIPS) yield. The number is NOT a clean forecast; it is biased by the inflation risk premium (up) and the TIPS liquidity premium (down). Realized inflation can diverge from breakevens by meaningful margins because of these structural features, not because the market is forecasting badly. TIPS are useful for investors with explicit inflation-protection needs, but the liquidity premium and tax treatment matter for sizing the allocation.

Five questions · AI feedback

Sit with the ideas.

The nominal 10-year Treasury yields 4.25%; the 10-year TIPS (Treasury Inflation-Protected Security) yields 1.80% in real terms. The implied 10-year inflation breakeven is therefore approximately 2.45%. Over the past decade, realized 10-year inflation has averaged 2.85%. What is the most defensible reading of the gap between the 2.45% breakeven and the 2.85% realized inflation?

Why:

Other lessons in this course.

  1. 01Convexity: When Duration Is Not Enough
  2. 02Yield Curve Strategies: Bullets, Barbells, and Ladders
  3. 03Credit Default Swaps: Insurance on Bonds
  4. 04Structured Credit: CLOs, MBS, and ABS
  5. 05Distressed Debt Investing
  6. 06Option-Adjusted Spread (OAS): Stripping Embedded Options From Yield
  7. 07Key-Rate Duration: Decomposing Curve Risk by Maturity
  8. 08Yield-Curve Steepeners: Long Short-End, Short Long-End
  9. 09Yield-Curve Flatteners and the Inverted-Curve Signal
  10. 10Butterfly Trades on the Yield Curve: Trading Curvature Directly
  11. 11Inflation Breakevens and TIPS Pricing: Reading the Real-vs-Nominal Spread— reading now
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