July 16th, 2011, 4:24 pm
QuoteOriginally posted by: kindlyMeDear all, suppose a bank has a forward contract where to sell 1mn USD to buy 0.75mn EUR. In this case how to determine what is this bank's exposure amount? I really appreciate if somebody explains me.What could be the case if just opposite happens?Thanks,The easiest way to understand this is by acknowledging that currency forward are really swaps; you can formally derive this from the covered interest rate parity (it's really the other way around, but never mind). As in any swap, we have a long and a short leg; in your example, assuming virtually zero interest rate (which is pretty much a market reality nowadays) the bank loads a short and a long exposure: -1mn USD and +0.75mn EUR. If interest rates are not zero, you have to discount by the relevant money market rates. This is at inititation; if you determine the exposures at any points in time later, you have to consider changes in the spot rate as well as changes in interest rates.This is a rather basic question, it is not surprsing that some people in this forum don't think your question is real. Personnally, I am not surprised, because a lot of the textbooks used do not explain the economic meaning of derivative contracts because they are written by people with math beackgrounds (Hull, for example) or then from an accounting perspective.A long call option on a stock has legs too: a short cash position and a long position in the stock. The clue here is that the exposures depend on the delta of the option (see Black/Scholes).Another story are certain regulatory exposure calculations. I prefer not to comment on these in public. What I decribed above is the "economic exposure".Rgrds,Andi
Last edited by
andste on July 15th, 2011, 10:00 pm, edited 1 time in total.