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Nonlinearity in Deviations from Uncovered Interest Parity: An Explanation of the Forward Bias Puzzle

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  • Leon, Hyginus
  • Sarno, Lucio
  • Valente, Giorgio

Abstract

We provide empirical evidence that deviations from the uncovered interest rate parity (UIP) condition display significant nonlinearities, consistent with theories based on transactions costs or limits to speculation. This evidence suggests that the forward bias documented in the literature may be less indicative of major market inefficiencies than previously thought. Monte Carlo experiments allow us to reconcile these results with the large empirical literature on the forward bias puzzle since we show that, if the true process of UIP deviations were of the nonlinear form we consider, estimation of conventional spot-forward regressions would generate the anomalies documented in previous research.

Suggested Citation

  • Leon, Hyginus & Sarno, Lucio & Valente, Giorgio, 2006. "Nonlinearity in Deviations from Uncovered Interest Parity: An Explanation of the Forward Bias Puzzle," CEPR Discussion Papers 5527, C.E.P.R. Discussion Papers.
  • Handle: RePEc:cpr:ceprdp:5527
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    Keywords

    foreign exchange; forward bias; nonlinearity; uncovered interest parity;

    JEL classification:

    • F31 - International Economics - - International Finance - - - Foreign Exchange

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