public override void calculate()
{
Utils.QL_REQUIRE(arguments_.exercise.type() == Exercise.Type.European, () => "not an European Option");
EuropeanExercise exercise = arguments_.exercise as EuropeanExercise;
Utils.QL_REQUIRE(exercise != null, () => "not an European Option");
BasketPayoff basket_payoff = arguments_.payoff as BasketPayoff;
MinBasketPayoff min_basket = arguments_.payoff as MinBasketPayoff;
MaxBasketPayoff max_basket = arguments_.payoff as MaxBasketPayoff;
Utils.QL_REQUIRE(min_basket != null || max_basket != null, () => "unknown basket type");
PlainVanillaPayoff payoff = basket_payoff.basePayoff() as PlainVanillaPayoff;
Utils.QL_REQUIRE(payoff != null, () => "non-plain payoff given");
double strike = payoff.strike();
double variance1 = process1_.blackVolatility().link.blackVariance(exercise.lastDate(), strike);
double variance2 = process2_.blackVolatility().link.blackVariance(exercise.lastDate(), strike);
double riskFreeDiscount = process1_.riskFreeRate().link.discount(exercise.lastDate());
// cannot handle non zero dividends, so don't believe this...
double dividendDiscount1 = process1_.dividendYield().link.discount(exercise.lastDate());
double dividendDiscount2 = process2_.dividendYield().link.discount(exercise.lastDate());
double forward1 = process1_.stateVariable().link.value() * dividendDiscount1 / riskFreeDiscount;
double forward2 = process2_.stateVariable().link.value() * dividendDiscount2 / riskFreeDiscount;
if (max_basket != null)
{
switch (payoff.optionType())
{
// euro call on a two asset max basket
case Option.Type.Call:
results_.value = euroTwoAssetMaxBasketCall(forward1, forward2, strike,
riskFreeDiscount,
variance1, variance2,
rho_);
break;
// euro put on a two asset max basket
case Option.Type.Put:
results_.value = strike * riskFreeDiscount -
euroTwoAssetMaxBasketCall(forward1, forward2, 0.0,
riskFreeDiscount,
variance1, variance2, rho_) +
euroTwoAssetMaxBasketCall(forward1, forward2, strike,
riskFreeDiscount,
variance1, variance2, rho_);
break;
default:
Utils.QL_FAIL("unknown option type");
break;
}
}
else if (min_basket != null)
{
switch (payoff.optionType())
{
// euro call on a two asset min basket
case Option.Type.Call:
results_.value = euroTwoAssetMinBasketCall(forward1, forward2, strike,
riskFreeDiscount,
variance1, variance2,
rho_);
break;
// euro put on a two asset min basket
case Option.Type.Put:
results_.value = strike * riskFreeDiscount -
euroTwoAssetMinBasketCall(forward1, forward2, 0.0,
riskFreeDiscount,
variance1, variance2, rho_) +
euroTwoAssetMinBasketCall(forward1, forward2, strike,
riskFreeDiscount,
variance1, variance2, rho_);
break;
default:
Utils.QL_FAIL("unknown option type");
break;
}
}
else
{
Utils.QL_FAIL("unknown type");
}
}
internal static global::System.Runtime.InteropServices.HandleRef getCPtr(MaxBasketPayoff obj)
{
return((obj == null) ? new global::System.Runtime.InteropServices.HandleRef(null, global::System.IntPtr.Zero) : obj.swigCPtr);
}
internal static global::System.Runtime.InteropServices.HandleRef getCPtr(MaxBasketPayoff obj) {
return (obj == null) ? new global::System.Runtime.InteropServices.HandleRef(null, global::System.IntPtr.Zero) : obj.swigCPtr;
}
