| 1 | /* -*- mode: c++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ |
| 2 | |
| 3 | /* |
| 4 | Copyright (C) 2008 Ferdinando Ametrano |
| 5 | Copyright (C) 2004, 2005, 2007 StatPro Italia srl |
| 6 | Copyright (C) 2015 Peter Caspers |
| 7 | |
| 8 | This file is part of QuantLib, a free-software/open-source library |
| 9 | for financial quantitative analysts and developers - http://quantlib.org/ |
| 10 | |
| 11 | QuantLib is free software: you can redistribute it and/or modify it |
| 12 | under the terms of the QuantLib license. You should have received a |
| 13 | copy of the license along with this program; if not, please email |
| 14 | <quantlib-dev@lists.sf.net>. The license is also available online at |
| 15 | <http://quantlib.org/license.shtml>. |
| 16 | |
| 17 | This program is distributed in the hope that it will be useful, but WITHOUT |
| 18 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS |
| 19 | FOR A PARTICULAR PURPOSE. See the license for more details. |
| 20 | */ |
| 21 | |
| 22 | /*! \file constantoptionletvol.hpp |
| 23 | \brief Constant caplet/floorlet volatility |
| 24 | */ |
| 25 | |
| 26 | #ifndef quantlib_caplet_constant_volatility_hpp |
| 27 | #define quantlib_caplet_constant_volatility_hpp |
| 28 | |
| 29 | #include <ql/termstructures/volatility/optionlet/optionletvolatilitystructure.hpp> |
| 30 | |
| 31 | namespace QuantLib { |
| 32 | |
| 33 | class Quote; |
| 34 | |
| 35 | //! Constant caplet volatility, no time-strike dependence |
| 36 | class ConstantOptionletVolatility : public OptionletVolatilityStructure { |
| 37 | public: |
| 38 | //! floating reference date, floating market data |
| 39 | ConstantOptionletVolatility(Natural settlementDays, |
| 40 | const Calendar& cal, |
| 41 | BusinessDayConvention bdc, |
| 42 | Handle<Quote> volatility, |
| 43 | const DayCounter& dc, |
| 44 | VolatilityType type = ShiftedLognormal, |
| 45 | Real displacement = 0.0); |
| 46 | //! fixed reference date, floating market data |
| 47 | ConstantOptionletVolatility(const Date& referenceDate, |
| 48 | const Calendar& cal, |
| 49 | BusinessDayConvention bdc, |
| 50 | Handle<Quote> volatility, |
| 51 | const DayCounter& dc, |
| 52 | VolatilityType type = ShiftedLognormal, |
| 53 | Real displacement = 0.0); |
| 54 | //! floating reference date, fixed market data |
| 55 | ConstantOptionletVolatility(Natural settlementDays, const Calendar &cal, |
| 56 | BusinessDayConvention bdc, |
| 57 | Volatility volatility, const DayCounter &dc, |
| 58 | VolatilityType type = ShiftedLognormal, |
| 59 | Real displacement = 0.0); |
| 60 | //! fixed reference date, fixed market data |
| 61 | ConstantOptionletVolatility(const Date &referenceDate, |
| 62 | const Calendar &cal, |
| 63 | BusinessDayConvention bdc, |
| 64 | Volatility volatility, const DayCounter &dc, |
| 65 | VolatilityType type = ShiftedLognormal, |
| 66 | Real displacement = 0.0); |
| 67 | //! \name TermStructure interface |
| 68 | //@{ |
| 69 | Date maxDate() const override; |
| 70 | //@} |
| 71 | //! \name VolatilityTermStructure interface |
| 72 | //@{ |
| 73 | Real minStrike() const override; |
| 74 | Real maxStrike() const override; |
| 75 | //@} |
| 76 | VolatilityType volatilityType() const override; |
| 77 | Real displacement() const override; |
| 78 | |
| 79 | protected: |
| 80 | ext::shared_ptr<SmileSection> smileSectionImpl(const Date& d) const override; |
| 81 | ext::shared_ptr<SmileSection> smileSectionImpl(Time) const override; |
| 82 | Volatility volatilityImpl(Time, Rate) const override; |
| 83 | |
| 84 | private: |
| 85 | Handle<Quote> volatility_; |
| 86 | VolatilityType type_; |
| 87 | Real displacement_; |
| 88 | }; |
| 89 | |
| 90 | |
| 91 | // inline definitions |
| 92 | |
| 93 | inline Date ConstantOptionletVolatility::maxDate() const { |
| 94 | return Date::maxDate(); |
| 95 | } |
| 96 | |
| 97 | inline Real ConstantOptionletVolatility::minStrike() const { |
| 98 | return QL_MIN_REAL; |
| 99 | } |
| 100 | |
| 101 | inline Real ConstantOptionletVolatility::maxStrike() const { |
| 102 | return QL_MAX_REAL; |
| 103 | } |
| 104 | |
| 105 | inline VolatilityType |
| 106 | ConstantOptionletVolatility::volatilityType() const { |
| 107 | return type_; |
| 108 | } |
| 109 | |
| 110 | inline Real ConstantOptionletVolatility::displacement() const { |
| 111 | return displacement_; |
| 112 | } |
| 113 | } |
| 114 | |
| 115 | #endif |
| 116 | |