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Nonlinearity in the reaction of the foreign exchange market to interest rate differentials: evidence from a small open economy with a long-term peg


  • Mahalia Jackman
  • Roland Craigwell
  • Michelle Doyle-Lowe


This article incorporates the Castle and Hendry (2010) portmanteau test into an Exponential Generalized Autoregressive Conditional Hetroscedasticity in Mean (EGARCH-M) model to investigate nonlinearities in the reaction of daily foreign exchange activity to the interest rate differential between the US and Barbados -- a small open economy which has been pegged to the US dollar for over 35 years. The results suggest that changes in the interest differential have a significant and nonlinear effect on the Barbadian foreign exchange market. The linear spread term is positive, and so is in line with a theory of uncovered interest parity for an economy with a fixed exchange rate. But, all other spread coefficients have a negative sign, implying that asymmetry is present. Thus, it is possible that there is a threshold at which foreign currencies no longer conform to the uncovered interest parity condition, but rather are negatively correlated with interest spreads. Finally, these findings were consistent in the pre-financial crisis analysis.

Suggested Citation

  • Mahalia Jackman & Roland Craigwell & Michelle Doyle-Lowe, 2013. "Nonlinearity in the reaction of the foreign exchange market to interest rate differentials: evidence from a small open economy with a long-term peg," Applied Financial Economics, Taylor & Francis Journals, vol. 23(4), pages 287-296, February.
  • Handle: RePEc:taf:apfiec:v:23:y:2013:i:4:p:287-296 DOI: 10.1080/09603107.2012.718063

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    Cited by:

    1. Jackman, Mahalia, 2012. "What Prompts Central Bank Intervention in the Barbadian Foreign Exchange Market?," MPRA Paper 41703, University Library of Munich, Germany.
    2. Mahalia Jackman, 2012. "Foreign exchange intervention in a small open economy with a long term peg," Economics Bulletin, AccessEcon, vol. 32(3), pages 2207-2219.

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