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Martingale Property of Exchange Rates and Central Bank Interventions

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  • Yilmaz, Kamil

Abstract

This article uses the variance ratio-based multiple comparison test and the Richardson-Smith Wald test procedures to test for the martingale property of daily exchange rates of seven major currencies vis-a-vis the U.S. dollar. To allow for the possibility that exchange rates are not governed by a single process throughout the float, the test statistics are calculated and plotted for fixed-length moving subsample windows rather than being applied to the full sample. The results show that exchange rates do not always follow the martingale process. During the times of coordinated central bank interventions, exchange rates deviate from the martingale property.

Suggested Citation

  • Yilmaz, Kamil, 2003. "Martingale Property of Exchange Rates and Central Bank Interventions," Journal of Business & Economic Statistics, American Statistical Association, vol. 21(3), pages 383-395, July.
    • Handle: RePEc:bes:jnlbes:v:21:y:2003:i:3:p:383-95
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    References listed on IDEAS

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    1. Guy Meredith & Menzie D. Chinn, 1998. "Long-Horizon Uncovered Interest Rate Parity," NBER Working Papers 6797, National Bureau of Economic Research, Inc.
    2. McKinnon, Ronald I, 1993. "The Rules of the Game: International Money in Historical Perspective," Journal of Economic Literature, American Economic Association, vol. 31(1), pages 1-44, March.
    3. Maurice Obstfeld, 1988. "The Effectiveness of Foreign-Exchange Intervention: Recent Experience," NBER Working Papers 2796, National Bureau of Economic Research, Inc.
    4. Baillie, Richard T. & P. Osterberg, William, 1997. "Central bank intervention and risk in the forward market," Journal of International Economics, Elsevier, vol. 43(3-4), pages 483-497, November.
    5. Mark, Nelson C, 1995. "Exchange Rates and Fundamentals: Evidence on Long-Horizon Predictability," American Economic Review, American Economic Association, vol. 85(1), pages 201-218, March.
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