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Tokyo insiders and the informational efficiency of the yen|dollar exchange rate


  • Vicentiu Covrig

    (Department of Finance, California State University-Northridge, USA)

  • Michael Melvin

    (Department of Economics, Arizona State University, USA)


When there is a high concentration of informed yen|dollar traders active in Tokyo, theory suggests that there should be a faster adjustment of the yen|dollar exchange rate to the full-information level. We exploit the data during a period believed to contain a high concentration of informed Japanese traders in order to test this hypothesis. Comparing the period of informed trader clustering to a similar period without the informed, we find that yen|dollar exchange rate quotes adjust to full-information levels three times faster when the informed are active than when they are not. These results are consistent with a view of the foreign exchange market where private information is at times quite important. Copyright © 2005 John Wiley & Sons, Ltd.

Suggested Citation

  • Vicentiu Covrig & Michael Melvin, 2005. "Tokyo insiders and the informational efficiency of the yen|dollar exchange rate," International Journal of Finance & Economics, John Wiley & Sons, Ltd., vol. 10(2), pages 185-193.
  • Handle: RePEc:ijf:ijfiec:v:10:y:2005:i:2:p:185-193 DOI: 10.1002/ijfe.263

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    References listed on IDEAS

    1. Takatoshi Ito & Richard K. Lyons & Michael T. Melvin, 1998. "Is There Private Information in the FX Market? The Tokyo Experiment," Journal of Finance, American Finance Association, vol. 53(3), pages 1111-1130, June.
    2. Brock, William A. & Kleidon, Allan W., 1992. "Periodic market closure and trading volume : A model of intraday bids and asks," Journal of Economic Dynamics and Control, Elsevier, vol. 16(3-4), pages 451-489.
    3. Anat R. Admati, Paul Pfleiderer, 1988. "A Theory of Intraday Patterns: Volume and Price Variability," Review of Financial Studies, Society for Financial Studies, vol. 1(1), pages 3-40.
    4. Kyle, Albert S, 1985. "Continuous Auctions and Insider Trading," Econometrica, Econometric Society, vol. 53(6), pages 1315-1335, November.
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    Cited by:

    1. Ito, Takatoshi & Hashimoto, Yuko, 2006. "Intraday seasonality in activities of the foreign exchange markets: Evidence from the electronic broking system," Journal of the Japanese and International Economies, Elsevier, vol. 20(4), pages 637-664, December.
    2. Yuko Hashimoto & Takatoshi Ito, 2009. "Effects of Japanese Macroeconomic Announcements on the Dollar/Yen Exchange Rate: High-Resolution Picture," NBER Working Papers 15020, National Bureau of Economic Research, Inc.
    3. Yuko Hashimoto & Takatoshi Ito & Takaaki Ohnishi & Misako Takayasu & Hideki Takayasu & Tsutomu Watanabe, 2008. "Random Walk or A Run: Market Microstructure Analysis of the Foreign Exchange Rate Movements based on Conditional Probability," NBER Working Papers 14160, National Bureau of Economic Research, Inc.
    4. Geir H. Bjønnes & Carol L. Osler & Dagfinn Rime, 2009. "Asymmetric information in the interbank foreign exchange market," Working Paper 2008/25, Norges Bank.

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