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/* -*- mode: c++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

 Copyright (C) 2000, 2001, 2002, 2003 RiskMap srl

 This file is part of QuantLib, a free-software/open-source library
 for financial quantitative analysts and developers - http://quantlib.org/

 QuantLib is free software: you can redistribute it and/or modify it
 under the terms of the QuantLib license.  You should have received a
 copy of the license along with this program; if not, please email
 <quantlib-dev@lists.sf.net>. The license is also available online at

 This program is distributed in the hope that it will be useful, but WITHOUT
 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 FOR A PARTICULAR PURPOSE.  See the license for more details.

#include <ql/Pricers/fdeuropean.hpp>
#include <ql/FiniteDifferences/valueatcenter.hpp>

namespace QuantLib {


    FdEuropean::FdEuropean(Option::Type type, Real underlying,
                           Real strike, Spread dividendYield,
                           Rate riskFreeRate, Time residualTime,
                           Volatility volatility,
                           Size timeSteps, Size gridPoints)
    : FdBsmOption(type, underlying, strike, dividendYield,
                  riskFreeRate, residualTime, volatility,
      timeSteps_(timeSteps), euroPrices_(gridPoints_){}

    void FdEuropean::calculate() const {
        setGridLimits(underlying_, residualTime_);

        StandardFiniteDifferenceModel model(finiteDifferenceOperator_,

        euroPrices_ = intrinsicValues_;

        model.rollback(euroPrices_, residualTime_, 0, timeSteps_);

        value_ = valueAtCenter(euroPrices_);
        delta_ = firstDerivativeAtCenter(euroPrices_, grid_);
        gamma_ = secondDerivativeAtCenter(euroPrices_, grid_);

        hasBeenCalculated_ = true;



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