Coupling Smiles
26 Pages Posted: 7 Aug 2007
Date Written: March 20, 2007
Abstract
The present paper addresses the problem of computing implied volatilities of options written on a domestic asset based on implied volatilities of options on the same asset expressed in a foreign currency and the exchange rate. It proposes an original method together with explicit formulas to compute the at-the-money implied volatility, the smile's skew, convexity, and term structure for short maturities. The method is completely free of any model specification or Markov assumption; it only assumes that jumps are not present. We also investigate how the method performs on the particular example of the currency triplet dollar, euro, yen. We find a very satisfactory agreement between our formulas and the market at one week and one month maturities.
Keywords: Implied volatility, foreign exchange options.
JEL Classification: G13
Suggested Citation: Suggested Citation
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