public HullWhiteProcess Calibrate(DiscountCurve disc)
        {
            //preset parameters, calibrating these is skipped due to the lack of openly accessible market data
            //might worth implementing later
            double a = 0.31, sigma = 0.008;

            //market instantaneous forward rate
            ForwardRate = disc.ForwardRate;

            Theta =

                t => Utils.Derive(x => ForwardRate(x), t)
                + a * ForwardRate(t)
                + sigma * sigma / (2.0 * a * a) * (1.0 - Math.Exp(-2.0 * a * t));


            Func <double, double> alpha =

                t => a *ForwardRate(t)
                + sigma * sigma / (2.0 * a * a) * (1.0 - Math.Exp(-2.0 * a * t));



            return(new HullWhiteProcess(Theta, a, sigma));
        }
        public double Price(PricingRequest request)
        {
            DiscountCurve dc = (DiscountCurve)request.Ycs.get();
            IProcess      calibratedProcess = RSCalibrator.Calibrate(dc);

            double r0 = dc.ForwardRate(0.01);

            return(request.Instrument.Price(calibratedProcess, new RSProcess.State(r0, 0), 0, step, n));
        }
示例#3
0
 public static RSProcess Calibrate(DiscountCurve dc)
 {
     return(new RSProcess(0.31, 0.008, dc.ForwardRate));
 }