private double FindPayoff(int[] p, double k)
{
double result = 0;
if (Derivative == Derivative.Caplet)
{
result = _economy.CapletPayoff(p[0], k);
}
if (Derivative == Derivative.Swaption)
{
result = _economy.SwaptionPayoff(p[0], p[1], k);
}
if (Derivative == Derivative.Custom)
{
result = Payoff.Evaluate();
}
return(result);
}