November 27th, 2012, 11:12 am
Hello everyone,I try to solve the same puzzle regarding flexible forwards. I have an instrument (say an FX-Forward) which can be exercised at any time before maturity (aka Callable Forward) . Therefore, it can be thought of as an american type forward agreement: trader is free to exercise at any time before maturity, however obligated to make the transaction (at latest) at maturity. Well, according to this description I made a literature review on how to price such instruments. Unfortunately, there is no exact match. I am not sure, but for the put case where spot<strike, I guess Longstaff-Schwartz simulation algorithm can be used for valuation (although it is very time consuming). The call case (where spot>strike) is a little bit tricky and I think one can simply value a forward contract under the assumption that it is not optimal to exercise an american call before maturity or simply use american call approximation (Bjerksund-Stensland). However, I am afraid that in both cases something is missing, because the instrument has both forward and option features. One approach would be to use a portfolio composed of a forward contract and an american option, but I am not really sure about the combination, given the underlying strategy (call/put). Any help will be appreciated. Thanks a lot in advance!