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Regime-dependent predictive accuracy and structural stability of Eurozone inflation swaps

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  • Kothe, Rafael

Abstract

This paper investigates the predictive accuracy of Eurozone inflation-linked swaps (ILS) across volatility regimes using a Markov-switching framework and regime-specific Mincer–Zarnowitz regressions. Results show a sharp divergence by maturity. While 12-month ILS remain approximately unbiased, their forecast precision (RMSE) deteriorates sharply in high-volatility states. In contrast, longer maturities (24–36 months) develop statistically significant, large positive biases (up to 378 basis points) and calibration losses evident across both volatility periods — a finding masked by standard asymptotic inference. These findings highlight the structural, persistent nature of the mispricing at medium horizons and the risk of policy misinterpretation.

Suggested Citation

  • Kothe, Rafael, 2026. "Regime-dependent predictive accuracy and structural stability of Eurozone inflation swaps," Economics Letters, Elsevier, vol. 262(C).
    • Handle: RePEc:eee:ecolet:v:262:y:2026:i:c:s0165176526000200
    DOI: 10.1016/j.econlet.2026.112826
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    JEL classification:

    • C22 - Mathematical and Quantitative Methods - - Single Equation Models; Single Variables - - - Time-Series Models; Dynamic Quantile Regressions; Dynamic Treatment Effect Models; Diffusion Processes
    • C52 - Mathematical and Quantitative Methods - - Econometric Modeling - - - Model Evaluation, Validation, and Selection
    • E52 - Macroeconomics and Monetary Economics - - Monetary Policy, Central Banking, and the Supply of Money and Credit - - - Monetary Policy
    • E31 - Macroeconomics and Monetary Economics - - Prices, Business Fluctuations, and Cycles - - - Price Level; Inflation; Deflation
    • G12 - Financial Economics - - General Financial Markets - - - Asset Pricing; Trading Volume; Bond Interest Rates

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