示例#1
0
        public void MakeVega(Tree SpotT, Pricer PriceT, ZeroCurve myZero, DivList myDiv)
        {
            SetParam(SpotT, PriceT);
            Tree T1 = new Tree(), T2 = new Tree();

            T1.Tau       = tau;
            T1.Gridsteps = Gridsteps;
            T1.Sig       = .99 * sig;
            T1.Spot      = spot;
            T1.MakeGrid(myZero, myDiv);

            PriceT.MakeGrid(T1);
            double P1 = PriceT.Price();

            T2.Tau       = tau;
            T2.Gridsteps = Gridsteps;
            T2.Sig       = 1.01 * sig;
            T2.Spot      = spot;
            T2.MakeGrid(myZero, myDiv);

            PriceT.MakeGrid(T2);
            double P2 = PriceT.Price();

            if (sig != 0)
            {
                Vega = 0.01 * (P2 - P1) / (2 * 0.01 * sig);
            }
        }
示例#2
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        public void MakeTheta(Tree SpotT, Pricer PriceT, ZeroCurve myZero, DivList myDiv)
        {
            SetParam(SpotT, PriceT);
            Tree T1 = new Tree(), T2 = new Tree();

            T1.Tau       = tau;
            T1.Gridsteps = Gridsteps;
            T1.Sig       = sig;
            T1.Spot      = spot;
            T1.MakeGrid(myZero, myDiv);

            PriceT.MakeGrid(T1);
            double P1 = PriceT.Price();

            double t = tau - 1.00 / 365.00;

            T2.Tau       = t;
            T2.Gridsteps = Gridsteps;
            T2.Sig       = sig;
            T2.Spot      = spot;
            T2.MakeGrid(myZero, myDiv);

            PriceT.MakeGrid(T2);
            double P2 = PriceT.Price();

            Theta = (P2 - P1);
        }
示例#3
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        public void MakeDeltaGamma(Tree spotT, Pricer priceT, ZeroCurve myZero, DivList myDiv)
        {
            SetParam(spotT, priceT);
            Tree treeD = new Tree
            {
                GridSteps = GridSteps + 2,
                Spot      = Spot,
                Sig       = Sigma,
                Tau       = Tau * (1 + 2 / GridSteps)
            };

            treeD.MakeGrid(myZero, myDiv);
            priceT.MakeGrid(treeD);
            double[] s = new double[3];
            double[] c = new double[3];
            for (int i = 0; i <= 2; ++i)
            {
                s[i] = treeD.GetSpotMatrix(2, i);
                c[i] = priceT.GetPriceMatrix(2, i);
            }
            Delta = (s[0] * (2 * s[1] - s[0]) * (c[1] - c[2]) +
                     (s[1] * s[1]) * (c[2] - c[0]) + s[2] * (2 * s[1] - s[2]) * (c[0] - c[1]))
                    / (s[1] - s[0]) / (s[2] - s[0]) / (s[2] - s[1]);

            Gamma = 2 * (s[0] * (c[1] - c[2]) + s[1] * (c[2] - c[0]) + s[2] * (c[0] - c[1]))
                    / (s[1] - s[0]) / (s[2] - s[0]) / (s[2] - s[1]);
        }
示例#4
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        public void MakeDeltaGamma(Tree SpotT, Pricer PriceT, ZeroCurve myZero, DivList myDiv)
        {
            SetParam(SpotT, PriceT);
            Tree treeD = new Tree
            {
                Gridsteps = Gridsteps + 2,
                Spot      = spot,
                Sig       = sig,
                Tau       = tau * (1 + 2 / Gridsteps)
            };

            treeD.MakeGrid(myZero, myDiv);
            PriceT.MakeGrid(treeD);

            double[] S = new double[3];
            double[] C = new double[3];
            for (int i = 0; i <= 2; ++i)
            {
                S[i] = treeD.GetSpotMatrix(2, i);
                C[i] = PriceT.Get_PriceMatrix(2, i);
            }
            Delta = (S[0] * (2 * S[1] - S[0]) * (C[1] - C[2]) +
                     (S[1] * S[1]) * (C[2] - C[0]) + S[2] * (2 * S[1] - S[2]) * (C[0] - C[1]))
                    / (S[1] - S[0]) / (S[2] - S[0]) / (S[2] - S[1]);

            Gamma = 2 * (S[0] * (C[1] - C[2]) + S[1] * (C[2] - C[0]) + S[2] * (C[0] - C[1]))
                    / (S[1] - S[0]) / (S[2] - S[0]) / (S[2] - S[1]);
        }
示例#5
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        public void MakeVega(Tree spotT, Pricer priceT, ZeroCurve myZero, DivList myDiv)
        {
            SetParam(spotT, priceT);
            Tree t1 = new Tree(), t2 = new Tree();

            t1.Tau       = Tau;
            t1.GridSteps = GridSteps;
            t1.Sig       = .99 * Sigma;
            t1.Spot      = Spot;
            t1.MakeGrid(myZero, myDiv);
            priceT.MakeGrid(t1);
            double p1 = priceT.Price();

            t2.Tau       = Tau;
            t2.GridSteps = GridSteps;
            t2.Sig       = 1.01 * Sigma;
            t2.Spot      = Spot;
            t2.MakeGrid(myZero, myDiv);
            priceT.MakeGrid(t2);
            double p2 = priceT.Price();

            if (Sigma != 0)
            {
                Vega = 0.01 * (p2 - p1) / (2 * 0.01 * Sigma);
            }
        }
示例#6
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        //public MakeGrid
        public void MakeGrid(ZeroCurve myZero, DivList myDivList)
        {
            EmptyArrays();
            MakeArrays();
            MakeSpotStar(myZero, myDivList);
            MakeDivArray(myZero, myDivList);
            FillForwardRate(myZero);
            FillUpDown(Sig);

            //make the spot grid
            double sv = Spotstar;

            SetSpotMatrix(0, 0, sv + get_div(0));

            //now march forward in time
            for (int idx = 1; idx <= Gridsteps; idx++)
            {
                for (int jdx = 0; jdx <= idx; jdx++)
                {
                    sv  = Spotstar * Math.Pow(get_up(idx - 1), jdx) * Math.Pow(get_dn(idx - 1), idx - jdx);
                    sv += (idx == Gridsteps) ? 0.0 : get_div(idx);
                    //get_div(idx);
                    SetSpotMatrix(idx, jdx, sv);
                }
            }
        }
示例#7
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        public static ZeroCurve as_zerocurve(YieldTermStructure curve)
        {
            ZeroCurve ret = new ZeroCurve(NQuantLibcPINVOKE.as_zerocurve(YieldTermStructure.getCPtr(curve)), true);

            if (NQuantLibcPINVOKE.SWIGPendingException.Pending)
            {
                throw NQuantLibcPINVOKE.SWIGPendingException.Retrieve();
            }
            return(ret);
        }
示例#8
0
 //compute Sstar for the BC's
 private double ComputeDiscDiv(double tTemp, double T, ZeroCurve myZero, DivList mydiv)
 {
     double temp = 0.0;
     for (int idx = 0; idx < mydiv.Divpoints; idx++)
     {
     if ((tTemp < mydiv.GetT(idx)) && (mydiv.GetT(idx) < T))
     {
         double fwdRate = myZero.ForwardRate(tTemp, mydiv.GetT(idx));
         temp += mydiv.GetD(idx) * Math.Exp(-fwdRate * (mydiv.GetT(idx) - tTemp));
     }
     }
     return temp;
 }
        public void NonFlatRates()
        {
            ZeroCurve myZero = new ZeroCurve();

            myZero.Ratepoints = 2;
            myZero.MakeArrays();
            myZero.SetR(0, 0.05, 1.0);
            myZero.SetR(1, 0.075, 2.0);

            //test interpolation priot to point 0
            double tTime = 0.5;
            double val   = myZero.LinInterp(tTime);

            Assert.IsTrue(val > 0.0499999999);
            Assert.IsTrue(val < 0.050000001);

            //test interpolation prior to point 1
            tTime = 1.5;
            val   = myZero.LinInterp(tTime);
            Assert.IsTrue(val > 0.062499999999);
            Assert.IsTrue(val < 0.06250000001);

            //test interpolation post  point 1
            tTime = 2.5;
            val   = myZero.LinInterp(tTime);
            Assert.IsTrue(val > 0.07499999999);
            Assert.IsTrue(val < 0.0750000001);

            //test forward rates

            //test interpolation priot to point 0
            double tl = 0.25;

            tTime = 0.5;
            val   = myZero.ForwardRate(tl, tTime);
            Assert.IsTrue(val > 0.0499999999);
            Assert.IsTrue(val < 0.050000001);

            //test interpolation prior to point 1
            tTime = 1.5;
            val   = myZero.ForwardRate(tl, tTime);
            Assert.IsTrue(val > 0.06499999); /// 0.065
            Assert.IsTrue(val < 0.065000001);

            //test interpolation post  point 1
            tTime = 2.5;
            val   = myZero.ForwardRate(tl, tTime); ///0.077778
            Assert.IsTrue(val > 0.0777777);
            Assert.IsTrue(val < 0.07777778);
        }
示例#10
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        public void NonFlatRates()
        {
            ZeroCurve myZero = new ZeroCurve();

            myZero.ratepoints = 2;
            myZero.makeArrays();
            myZero.set_r(0, 0.05, 1.0);
            myZero.set_r(1, 0.075, 2.0);

            //test interpolation priot to point 0
            double tTime = 0.5;
            double val   = myZero.linInterp(tTime);

            Assert.Greater(val, 0.0499999999);
            Assert.Less(val, 0.050000001);

            //test interpolation prior to point 1
            tTime = 1.5;
            val   = myZero.linInterp(tTime);
            Assert.Greater(val, 0.062499999999);
            Assert.Less(val, 0.06250000001);

            //test interpolation post  point 1
            tTime = 2.5;
            val   = myZero.linInterp(tTime);
            Assert.Greater(val, 0.07499999999);
            Assert.Less(val, 0.0750000001);

            //test forward rates

            //test interpolation priot to point 0
            double tl = 0.25;

            tTime = 0.5;
            val   = myZero.forwardRate(tl, tTime);
            Assert.Greater(val, 0.0499999999);
            Assert.Less(val, 0.050000001);

            //test interpolation prior to point 1
            tTime = 1.5;
            val   = myZero.forwardRate(tl, tTime);
            Assert.Greater(val, 0.06499999); /// 0.065
            Assert.Less(val, 0.065000001);

            //test interpolation post  point 1
            tTime = 2.5;
            val   = myZero.forwardRate(tl, tTime); ///0.077778
            Assert.Greater(val, 0.0777777);
            Assert.Less(val, 0.07777778);
        }
示例#11
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        //fill grid forward rates
        private void FillForwardRate(ZeroCurve myZero)
        {
            double dt = Tau / Gridsteps;

            if (myZero != null)
            {
                if (flatFlag)
                {
                    flatRate = myZero.LinInterp(Tau);
                }
                for (int idx = 0; idx < Gridsteps; idx++)
                {
                    SetR(idx, flatFlag ? flatRate : myZero.ForwardRate(idx * dt, (idx + 1) * dt));
                }
            }
        }
示例#12
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 private void MakeSpotStar(ZeroCurve myZero, DivList myDivList)
 {
     SpotStart = Spot;
     if ((myDivList != null) && (myZero != null))
     {
         for (int idx = 0; idx < myDivList.Divpoints; idx++)
         {
             if (myDivList.GetT(idx) <= Tau)
             {
                 double d1 = myDivList.GetD(idx);
                 double r1 = myZero.LinInterp(myDivList.GetT(idx));
                 double t1 = Math.Exp(-r1 * myDivList.GetT(idx));
                 SpotStart -= d1 * t1;
             }
         }
     }
 }
        public void ADivSlopingZero()
        {
            DivList mydiv = new DivList();

            mydiv.Divpoints = 1;
            mydiv.MakeArrays();
            mydiv.SetD(0, 5, 0.5);

            ZeroCurve myZero = new ZeroCurve();

            myZero.Ratepoints = 2;
            myZero.MakeArrays();
            myZero.SetR(0, 0.075, 0.5);
            myZero.SetR(1, 0.05, 2);

            //create the tree
            Tree myTree = new Tree();

            myTree.Gridsteps = 100;
            myTree.Tau       = 1.0;
            myTree.Sig       = 0.25;
            myTree.Spot      = 100.0;
            //myTree.flatFlag = false;
            myTree.MakeGrid(myZero, mydiv);

            //create pricer
            Pricer myPrice = new Pricer();

            myPrice.Strike    = 100;
            myPrice.Payoff    = "c";
            myPrice.Smoothing = "y";
            myPrice.Style     = "a";

            myPrice.MakeGrid(myTree);
            double prc = myPrice.Price();

            myPrice.Payoff = "p";
            myPrice.MakeGrid(myTree);
            double prp = myPrice.Price();

            Assert.IsTrue(prc > 10.37); //Orc pr = 10.38
            Assert.IsTrue(prc < 10.39);

            Assert.IsTrue(prp > 9.42); //Orc pr = 9.43
            Assert.IsTrue(prp < 9.44);
        }
        public void EDivFlatZero()
        {
            DivList mydiv = new DivList();

            mydiv.Divpoints = 1;
            mydiv.MakeArrays();
            mydiv.SetD(0, 5, 0.5);

            ZeroCurve myZero = new ZeroCurve();

            myZero.Ratepoints = 1;
            myZero.MakeArrays();
            myZero.SetR(0, 0.05, 1.0);

            //create the tree
            Tree myTree = new Tree();

            myTree.Gridsteps = 100;
            myTree.Tau       = 1.0;
            myTree.Sig       = 0.25;
            myTree.Spot      = 100.0;
            //myTree.flatFlag = false;
            myTree.MakeGrid(myZero, mydiv);

            //create pricer
            Pricer myPrice = new Pricer();

            myPrice.Strike    = 100;
            myPrice.Payoff    = "c";
            myPrice.Smoothing = "y";
            myPrice.Style     = "e";

            myPrice.MakeGrid(myTree);
            double prc = myPrice.Price();

            myPrice.Payoff = "p";
            myPrice.MakeGrid(myTree);
            double prp = myPrice.Price();

            Assert.IsTrue(prc > 9.455); //BS pr = 9.46277
            Assert.IsTrue(prc < 9.475);

            Assert.IsTrue(prp > 9.462); //BS pr = 9.46226
            Assert.IsTrue(prp < 9.475);
        }
        public void ANoDivFlatZero()
        {
            DivList mydiv = new DivList();

            mydiv.Divpoints = 1;
            mydiv.MakeArrays();
            mydiv.SetD(0, 0.0, 1.0);

            ZeroCurve myZero = new ZeroCurve();

            myZero.Ratepoints = 1;
            myZero.MakeArrays();
            myZero.SetR(0, 0.05, 1.0);

            //create the tree
            Tree myTree = new Tree();

            myTree.Gridsteps = 100;
            myTree.Tau       = 1.0;
            myTree.Sig       = 0.25;
            myTree.Spot      = 100.0;
            //myTree.flatFlag = false;
            myTree.MakeGrid(myZero, mydiv);

            //create pricer
            Pricer myPrice = new Pricer();

            myPrice.Strike    = 100;
            myPrice.Payoff    = "c";
            myPrice.Smoothing = "y";
            myPrice.Style     = "a";

            myPrice.MakeGrid(myTree);
            double prc = myPrice.Price();

            myPrice.Payoff = "p";
            myPrice.MakeGrid(myTree);
            double prp = myPrice.Price();

            Assert.IsTrue(prc > 12.33); //Orc pr = 12.34
            Assert.IsTrue(prc < 12.35);

            Assert.IsTrue(prp > 7.98); //Orc pr = 7.99
            Assert.IsTrue(prp < 8.00);
        }
        public void DivFlatZero()
        {
            DivList mydiv = new DivList();

            mydiv.divpoints = 1;
            mydiv.makeArrays();
            mydiv.set_d(0, 5, 0.5);

            ZeroCurve myZero = new ZeroCurve();

            myZero.ratepoints = 1;
            myZero.makeArrays();
            myZero.set_r(0, 0.05, 1.0);

            //create the tree
            DiscreteTree myTree = new DiscreteTree();

            myTree.Gridsteps = 100;
            myTree.tau       = 1.0;
            myTree.sig       = 0.25;
            myTree.Spot      = 100.0;
            //myTree.flatFlag = false;
            myTree.MakeGrid(myZero, mydiv);

            //create pricer
            Pricer myPrice = new Pricer();

            myPrice.Strike    = 100;
            myPrice.Payoff    = "c";
            myPrice.Smoothing = "y";
            myPrice.Style     = "e";

            myPrice.MakeGrid(myTree);
            double prc = myPrice.Price();

            myPrice.Payoff = "p";
            myPrice.MakeGrid(myTree);
            double prp = myPrice.Price();

            Assert.Greater(prc, 9.455); //BS pr = 9.46277
            Assert.Less(prc, 9.475);

            Assert.Greater(prp, 9.462); //BS pr = 9.46226
            Assert.Less(prp, 9.475);
        }
示例#17
0
                /// <summary>
                /// 
                /// </summary>
                /// <param name="price"></param>
                /// <param name="myZero"></param>
                /// <param name="myDiv"></param>
                /// <returns></returns>
            public double ImpVol(double price, ZeroCurve myZero, DivList myDiv)
            {

                double[] greeks = new double[4];
                double temp = Pricer(myZero, myDiv, ref greeks, false);
                for (int idx = 0; idx < 20; idx++)
                {
                temp = Pricer(myZero, myDiv, ref greeks, false);
                if (Math.Abs(temp - price) < 0.0001) break;

                double sigold = Sig;
                double dsig = 0.01 * Sig;
                Sig += dsig;
                double tempUp = Pricer(myZero, myDiv, ref greeks, false);
                sigold -= (temp - price) * dsig / (tempUp - temp);
                Sig = sigold;
                }
                return Sig;
            }
示例#18
0
        public void MakeTheta(Tree spotT, Pricer priceT, ZeroCurve myZero, DivList myDiv)
        {
            SetParam(spotT, priceT);
            Tree t1 = new Tree(), t2 = new Tree();

            t1.Tau       = Tau;
            t1.GridSteps = GridSteps;
            t1.Sig       = Sigma;
            t1.Spot      = Spot;
            t1.MakeGrid(myZero, myDiv);
            priceT.MakeGrid(t1);
            double p1 = priceT.Price();
            double t  = Tau - 1.00 / 365.00;

            t2.Tau       = t;
            t2.GridSteps = GridSteps;
            t2.Sig       = Sigma;
            t2.Spot      = Spot;
            t2.MakeGrid(myZero, myDiv);
            priceT.MakeGrid(t2);
            double p2 = priceT.Price();

            Theta = (p2 - p1);
        }
示例#19
0
            /// <summary>
            /// main pricer
            /// </summary>
            /// <param name="myZero"></param>
            /// <param name="myDiv"></param>
            /// <param name="greeks"></param>
            /// <param name="bGreeks"></param>
            /// <returns></returns>
            public double Pricer(ZeroCurve myZero, DivList myDiv, ref double[] greeks, bool bGreeks)
            {

                _x = new List<double>();
                _v = new List<double>();

                double tTemp = T;  //real time
                double tau = 0.0; //backward time

                double dtnom = T / (double) NTsteps;
                double dt = dtnom;
                double tempInt=0.0;

                //start the pricer

                CreateGrid();
                TerminalCondition();

                while( tau < T)
                {
                //set the increment
                double t1 = tTemp - dtnom;
                t1 = (t1 >= 0.0) ? t1 : 0.0;  //make sure t1 >= 0.0
                double divPay = 0.0;
                dt = CheckBetweenDiv(t1, tTemp, ref divPay, myDiv);


                //compute the real time and backward time tau
                tTemp -= dt;
                tau = T - tTemp;    
       
                //compute the increment forward rate
                _domR = myZero.ForwardRate(tTemp, tTemp + dt);
                _forR = 0.0;

                //compute the forward rate from real time tTemp to expiry for the BC'c
                double domRbc = myZero.ForwardRate(tTemp, T);

                //compute discounted dividends for the bc's
                double DiscDiv = ComputeDiscDiv(tTemp, T, myZero, myDiv);

                //save the value at the spot for use in theta calcuation
                int nKeyInt = (int)((Math.Log(Spot) - XL) / _dx);
                double fracInt = (Math.Log(Spot) - _x[nKeyInt]) / (_x[nKeyInt + 1] - _x[nKeyInt]);
                tempInt = _v[nKeyInt] * (1.0 - fracInt) + _v[nKeyInt + 1] * fracInt;


                //get the fwd
                _lnfwd = Math.Log(GetATMfwd(myZero, myDiv, tTemp));

                //build the matrix
                OneStepSetUp(dt, tTemp);

                //compute the q vec
                MakeQVec();

        
                if (SStyle.ToUpper().Equals("E"))
                {
                    // set the exlicit BC
                    _v[0] = MakeLowerBC(tau, Math.Exp(_x[0]), domRbc, DiscDiv);
                    _v[Steps - 1] = MakeUpperBC(tau, Math.Exp(_x[Steps - 1]), domRbc, DiscDiv);
                    SORmethod();

                    //subract from q(1) and q(_steps-2) for explicit BC
                    //'_q[1] -= _SubDiagL[0] * _v[0];
                    //'_q[_msteps - 1] -= _SuperDiagL[_steps - 1] * _v[_steps - 1];

                    //this commented out info is used for the zero curvature condition
                    //_DiagL[1] += 2.0 * _SubDiagL[1];
                    //_SuperDiagL[1] -= _SubDiagL[1];
                    //_DiagL[_steps - 2] += 2.0 * _SuperDiagL[_steps - 2];
                    //_SubDiagL[_steps - 2] -= _SuperDiagL[_steps - 2];

                    //call LU decomp
                    //LUDecomp();
                    //Call the LU sOlver
                    //LUSolution();

                    //for zero curvature
                    //_v[0] = 2.0 * _v[1] - _v[2];
                    //_v[_steps - 1] = 2.0 * _v[_steps - 2] - _v[_steps - 3];
                }
                else
                {
                    _v[0] = MakeLowerBC(tau, Math.Exp(_x[0]), domRbc, DiscDiv);
                    _v[Steps - 1] = MakeUpperBC(tau, Math.Exp(_x[Steps - 1]), domRbc, DiscDiv);       
                    SORmethod();
                }

                //after having incremented back,  apply a grid shift if needed
                if (divPay != 0.0)
                {
                    ApplyGridShift(tau, divPay, domRbc, DiscDiv);
                }

                }

                int nKey = (int) ((Math.Log(Spot) - XL) / _dx);
                double frac = (Math.Log(Spot) - _x[nKey])/ (_x[nKey+1] - _x[nKey]);
                double temp = _v[nKey] * (1.0 - frac) + _v[nKey+1] * frac;

                if (bGreeks)
                {
        
                double[,] a = new double[4, 4];
                double[] b = new double[4];

                a[0,0] = 1.0;
                a[1,0] = 1.0;
                a[2,0] = 1.0;
                a[3,0] = 1.0;

                a[0, 1] = Math.Exp(_x[nKey-1]);
                a[1, 1] = Math.Exp(_x[nKey]);
                a[2, 1] = Math.Exp(_x[nKey +1]);
                a[3, 1] = Math.Exp(_x[nKey +2]);

                a[0, 2] = Math.Exp(_x[nKey - 1]) * Math.Exp(_x[nKey - 1]);
                a[1, 2] = Math.Exp(_x[nKey]) * Math.Exp(_x[nKey]);
                a[2, 2] = Math.Exp(_x[nKey + 1])*Math.Exp(_x[nKey + 1]);
                a[3, 2] = Math.Exp(_x[nKey + 2]) * Math.Exp(_x[nKey + 1]);

                a[0, 3] = Math.Exp(_x[nKey - 1])*Math.Exp(_x[nKey - 1])*Math.Exp(_x[nKey - 1]);
                a[1, 3] = Math.Exp(_x[nKey]) * Math.Exp(_x[nKey]) * Math.Exp(_x[nKey]);
                a[2, 3] = Math.Exp(_x[nKey + 1]) * Math.Exp(_x[nKey + 1]) * Math.Exp(_x[nKey +1]);
                a[3, 3] = Math.Exp(_x[nKey + 2] )* Math.Exp(_x[nKey + 2] )* Math.Exp(_x[nKey + 2]);

                b[0] = _v[nKey-1];
                b[1] = _v[nKey];
                b[2] = _v[nKey+1];
                b[3] = _v[nKey+2];


                int info = NewtonGauss(4, ref a, ref b);

                greeks[0] = b[1] + 2.0 * b[2] * Spot +3.0 * b[3] * Spot * Spot;
                greeks[1] =2.0*b[2] +6.0* b[3] * Spot ;
                greeks[2] = (tempInt - temp) / (365.0 * dt); 

                /*
                nKey = (int)((Math.Log(_spot) * 1.001 - _xl) / _dx);
                frac = (Math.Log(_spot )* 1.001 - _x[nKey]) / (_x[nKey + 1] - _x[nKey]);
                double tempUp = _v[nKey] * (1.0 - frac) + _v[nKey + 1] * frac;

                nKey = (int)((Math.Log(_spot) * 0.999 - _xl) / _dx);
                frac = (Math.Log(_spot) * 0.999 - _x[nKey]) / (_x[nKey + 1] - _x[nKey]);
                double tempDn = _v[nKey] * (1.0 - frac) + _v[nKey + 1] * frac;

                greeks[0] = (tempUp - tempDn) / (0.002 *Math.Log(spot))/spot ;
                greeks[1] = (tempUp + tempDn - 2.0 * temp) / Math.Pow(0.001 * _spot * Math.Log(_spot), 2.0) - greeks[0]/_spot;
                greeks[2] = (tempInt - temp) / (365.0 * dt); 
                    */
        
                }
        

                return temp;
            }
示例#20
0
文件: ZeroCurve.cs 项目: minikie/test
 internal static global::System.Runtime.InteropServices.HandleRef getCPtr(ZeroCurve obj) {
   return (obj == null) ? new global::System.Runtime.InteropServices.HandleRef(null, global::System.IntPtr.Zero) : obj.swigCPtr;
 }
示例#21
0
 internal static global::System.Runtime.InteropServices.HandleRef getCPtr(ZeroCurve obj)
 {
     return((obj == null) ? new global::System.Runtime.InteropServices.HandleRef(null, global::System.IntPtr.Zero) : obj.swigCPtr);
 }