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Below the zero lower bound: A shadow-rate term structure model for the euro area

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  • Lemke, Wolfgang
  • Vladu, Andreea L.

Abstract

We propose an arbitrage-free shadow-rate term structure model to analyze the euro-area yield curve from 1999 to mid-2015, when bond yields turned negative at various maturities. In the model the 'shadow rate' can reach any positive or negative level, while the actual one-month rate cannot fall below some lower bound perceived by market participants. This bound is estimated to have first ranged marginally above zero, before falling to -11 bps in September 2014. We show analytically that the lower bound itself can be interpreted as a 'policy parameter' and interpret the September 2014 ECB rate cut from this perspective. Our model improves upon a standard Gaussian affine model by providing a better match with survey forecasts of short-term rates during the low-rate period and by capturing the decline in yield volatility. The model implies that since mid-2012, the median horizon after which future short rates are expected to return to 25 bps has ranged between 18 and 62 months. However, the liftoff timing, as well as the quantification of forward premia, is highly sensitive to the level of the lower bound.

Suggested Citation

  • Lemke, Wolfgang & Vladu, Andreea L., 2016. "Below the zero lower bound: A shadow-rate term structure model for the euro area," Discussion Papers 32/2016, Deutsche Bundesbank.
  • Handle: RePEc:zbw:bubdps:322016
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    More about this item

    Keywords

    term structure of interest rates; lower bound; nonlinear state-space model; monetary policy expectations;

    JEL classification:

    • C32 - Mathematical and Quantitative Methods - - Multiple or Simultaneous Equation Models; Multiple Variables - - - Time-Series Models; Dynamic Quantile Regressions; Dynamic Treatment Effect Models; Diffusion Processes; State Space Models
    • E43 - Macroeconomics and Monetary Economics - - Money and Interest Rates - - - Interest Rates: Determination, Term Structure, and Effects
    • E52 - Macroeconomics and Monetary Economics - - Monetary Policy, Central Banking, and the Supply of Money and Credit - - - Monetary Policy

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