Explaining Forward Exchange Bias..Intraday

Richard K. Lyons, Andrew K. Rose

NBER Working Paper No. 4982
Issued in January 1995
NBER Program(s):International Finance and Macroeconomics

Intraday interest rates are zero. Consequently, a foreign exchange dealer can short a vulnerable currency in the morning, close this position in the afternoon, and never face an interest cost. This tactic might seem especially attractive in times of crisis, since it suggests an immunity to the central bank's interest rate defense. In equilibrium, however, buyers of the vulnerable currency must be compensated on average with an intraday capital gain as long as no devaluation occurs. That is, currencies under attack should typically appreciate intraday. Using data on intraday exchange rate changes within the EMS, we find this prediction is borne out.

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Document Object Identifier (DOI): 10.3386/w4982

Published: Journal of Finance, vol. 50, no. 4, pp. 1321-1329, September 1995 citation courtesy of

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