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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.

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Bibliographic Info

Article provided by American Statistical Association in its journal Journal of Business and Economic Statistics.

Volume (Year): 21 (2003)
Issue (Month): 3 (July)
Pages: 383-95
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Handle: RePEc:bes:jnlbes:v:21:y:2003:i:3:p:383-95

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Cited by:
  1. Kaltenbrunner, Annina & Nissanke, Machiko, 2009. "The Case for an Intermediate Exchange Rate Regime with Endogenizing Market Structures and Capital Mobility," Working Papers UNU-WIDER Research Paper , World Institute for Development Economic Research (UNU-WIDER).
  2. Shyh-wei Chen, 2009. "Random walks in asian foreign exchange markets:evidence from new multiple variance ratio tests," Economics Bulletin, AccessEcon, vol. 29(2), pages 1296-1307.
  3. Hyginus Leon & Serineh Najarian, 2005. "Asymmetric adjustment and nonlinear dynamics in real exchange rates," International Journal of Finance & Economics, John Wiley & Sons, Ltd., vol. 10(1), pages 15-39.
  4. Young-Sook Lee & Tae-Hwan Kim & Paul Newbold, 2005. "Revisiting the Martingale hypothesis for exchange rates," Money Macro and Finance (MMF) Research Group Conference 2005 19, Money Macro and Finance Research Group.
  5. Yang, Jian & Su, Xiaojing & Kolari, James W., 2008. "Do Euro exchange rates follow a martingale? Some out-of-sample evidence," Journal of Banking & Finance, Elsevier, vol. 32(5), pages 729-740, May.
  6. Serineh Najarian & H. L. Leon, 2003. "Asymmetric Adjustment and Nonlinear Dynamics in Real Exchange Rates," IMF Working Papers 03/159, International Monetary Fund.

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