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Is there private information in the FX market? the Tokyo experiment

  • Takatosh Ito
  • Richard K. Lyons
  • Michael T. Melvin

It is a common view that private information in the foreign exchange market does not exist. We provide evidence against this view. The evidence comes from the introduction of trading in Tokyo over the lunch-hour. Lunch return variance doubles with the introduction of trading, which cannot be due to public information since the flow of public information did not change with the trading rules. Having eliminated public information as the cause, we exploit recent results in microstructure to discriminate between the two alternatives: private information and pricing errors. Three key results support the predictions of private-information models. First, the volatility U-shape flattens: greater revelation over lunch leaves a smaller share for the morning and afternoon. Second, the U-shape tilts upward, and implication of information whose private value is transitory. Finally, the morning exhibits a clear U-shape when Tokyo closes over lunch, and it disappears when trading is introduced.

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Paper provided by Federal Reserve Bank of San Francisco in its series Pacific Basin Working Paper Series with number 97-04.

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Date of creation: 1997
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Handle: RePEc:fip:fedfpb:97-04
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