Пример #1
0
        public double pvPremiumLegCreditSensitivity(
            CDS cds,
            YieldTermStructure yieldCurve,
            PiecewiseconstantHazardRate creditCurve,
            int creditCurveNode)
        {
            if (cds.getProtectionEnd() <= 0.0)
            { //short cut already expired CDSs
                return(0.0);
            }

            int    n       = cds.getNumPayments();
            double pvSense = 0.0;

            for (int i = 0; i < n; i++)
            {
                CdsCoupon c             = cds.getCoupon(i);
                double    paymentTime   = c.getPaymentTime();
                double    creditObsTime = c.getEffEnd();
                double    dqdh          = creditCurve.getSingleNodeDiscountFactorSensitivity(creditObsTime, creditCurveNode);
                if (dqdh == 0)
                {
                    continue;
                }
                double p = Math.Exp(-yieldCurve.getRT_(paymentTime));
                pvSense += c.getYearFrac() * p * dqdh;
            }

            if (cds.isPayAccOnDefault())
            {
                double   start = cds.getNumPayments() == 1 ? cds.getEffectiveProtectionStart() : cds.getAccStart();
                double[] integrationSchedule = DoublesScheduleGenerator.getIntegrationsPoints(start, cds.getProtectionEnd(), yieldCurve, creditCurve);

                double accPVSense = 0.0;
                for (int i = 0; i < n; i++)
                {
                    accPVSense += calculateSinglePeriodAccrualOnDefaultCreditSensitivity(
                        cds.getCoupon(i),
                        cds.getEffectiveProtectionStart(), integrationSchedule, yieldCurve, creditCurve, creditCurveNode);
                }
                pvSense += accPVSense;
            }

            double df = Math.Exp(-yieldCurve.getRT_(cds.getCashSettleTime()));

            pvSense /= df;
            return(pvSense);
        }
Пример #2
0
 public CouponOnlyElement(CdsCoupon coupon, YieldTermStructure yieldCurve, int creditCurveKnot)
 {
     _riskLessValue   = coupon.getYearFrac() * Math.Exp(-yieldCurve.getRT_(coupon.getPaymentTime()));
     _effEnd          = coupon.getEffEnd();
     _creditCurveKnot = creditCurveKnot;
 }