/*! Expected next coupon: depending on (the bond and) the given date
* the coupon can be historic, deterministic or expected in a
* stochastic sense. When the bond settlement date is used the coupon
* is the already-fixed not-yet-paid one.
*
* The current bond settlement is used if no date is given.
*/
public virtual double nextCouponRate(Date settlement = null)
{
return(BondFunctions.nextCouponRate(this, settlement));
}