Is There Private Information in the FX Market? The Tokyo Experiment

Takatoshi Ito (), Richard Lyons () and Michael Melvin

No 5936, NBER Working Papers from National Bureau of Economic Research, Inc

Abstract: 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 the volatility pattern over the whole day 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, an 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.

JEL-codes: F31 G15 (search for similar items in EconPapers)
Date: 1997-02
Note: AP IFM
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (18)

Published as Journal of Finance (June 1998): 1111-1130.

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Working Paper: Is there private information in the FX market? the Tokyo experiment (1997)
Working Paper: Is There Private Information on the FX Market? The Tokyo Experiment (1997)
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