As far as I understand, a compounded swap rolls up individual payments into one final payment which becomes: V(tn)=Nn−1∏i=0(1+diLi)−N
where di is the day fraction for period ti to ti+1 and Li is the index for the same period and where N is deducted at the end because we assume no exchange of notional.
Now, to value this we need to calculate the expectation of V(T) under some appropriate numéraire and measure, but we are dealing with products of various Li's which are, in general, not mutually independent, so it's not a simple matter of replacing with them forwards.
How is this then done? An internet search only revealed simple formulas using forwards. A good reference text would be welcome.
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Following suggestions in the comments, if I use the adjusted forward numéraire with maturity equal to the payment date tn and using P(ti,ti+1)=11+d(ti,ti+1)L(t,ti+1), then I get: V(t)=P(t,tn)EQtn[V(tn)|Ft]=NP(t,tn)(EQtn[n−1∏i=01P(ti,ti+1)|Ft]−1)
but I'm not sure that this gets me anywhere.
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