Session 4: Economics for Valuation Reading 18: Currency Exchange Rates
LOS h: Explain interest rate parity, and illustrate covered interest arbitrage.
Assume the 1 year USD:EUR forward rate is 0.89348, the German interest rate is 3.38 percent, and the U.S. interest rate is 1.90 percent. If interest rate parity (IRP) holds, the USD:EUR spot rate is approximately:
Interest rate parity is given by:
Forward FCC = Spot FCC × [(1 + rdomestic) / (1 + rforeign)], or alternatively Spot FCC = Forward FCC × [(1 + rforeign) / (1 + rdomestic)] = 0.89348 × (1.0190 / 1.0338) = 0.88069
Note that in this question, the dollar is the foreign currency and the Euro is the domestic currency.
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