April 23rd, 2014, 6:19 pm
QuoteOriginally posted by: yktsuiSo after a forward contract was established, subsequent shift in yield curves of both currency have no impact to its value at time t??? That means it has no interest rate risk???Was the formula reli incorrect??? Any idea on where to get the correct one???Thanks.I am not sure about your formula but the forward exchange rate at time t is given by[$] F = S e^{(r_d-r_f)(T-t)}[$] where S is the spot rate, [$]r_d[$] is the domestic interest rate and [$]r_f[$] is the foreign interest rate. the present value of a contract to buy a foreign currency at a price K is given by[$] V = e^{-r_d(T-t)}(F-K)[$] where F is given by the previous equation. So you can see that time 0, if K is chosen to be the same as F then the value of the contract is 0.
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