TY - JOUR AU - Lyons,Richard K. AU - Rose,Andrew K. TI - Explaining Forward Exchange Bias..Intraday JF - National Bureau of Economic Research Working Paper Series VL - No. 4982 PY - 1995 Y2 - January 1995 UR - http://www.nber.org/papers/w4982 L1 - http://www.nber.org/papers/w4982.pdf N1 - Author contact info: Richard K. Lyons 460 Michigan Ave Berkeley, CA 94707 Tel: 510-642-1059 Fax: 510-642-4700 E-Mail: lyons@haas.berkeley.edu Andrew K. Rose Haas School of Business Administration University of California, Berkeley Berkeley, CA 94720-1900 Tel: 510/642-6609 Fax: 510/642-4700 E-Mail: arose@haas.berkeley.edu AB - 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. ER -