QuantLib: a free/open-source library for quantitative finance
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hestonrndcalculator.hpp
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1/* -*- mode: c++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2
3/*
4 Copyright (C) 2015 Johannes Göttker-Schnetmann
5 Copyright (C) 2015 Klaus Spanderen
6
7 This file is part of QuantLib, a free-software/open-source library
8 for financial quantitative analysts and developers - http://quantlib.org/
9
10 QuantLib is free software: you can redistribute it and/or modify it
11 under the terms of the QuantLib license. You should have received a
12 copy of the license along with this program; if not, please email
13 <quantlib-dev@lists.sf.net>. The license is also available online at
14 <http://quantlib.org/license.shtml>.
15
16 This program is distributed in the hope that it will be useful, but WITHOUT
17 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
18 FOR A PARTICULAR PURPOSE. See the license for more details.
19*/
20
21/*! \file hestonrndcalculator.hpp
22 \brief risk neutral terminal density calculator for the
23 Heston stochastic volatility model
24*/
25
26#ifndef quantlib_heston_risk_neutral_density_calculator_hpp
27#define quantlib_heston_risk_neutral_density_calculator_hpp
28
30#include <ql/shared_ptr.hpp>
31
32namespace QuantLib {
33 class HestonProcess;
34
35 //! Risk neutral terminal probability density for the Heston model
36
37 /*! References:
38
39 The formulas are taken from A. Dragulescu, V. Yakovenko, 2002.
40 Probability distribution of returns in the Heston model
41 with stochastic volatility.
42 http://arxiv.org/pdf/cond-mat/0203046.pdf
43 */
44
46 public:
47 explicit HestonRNDCalculator(ext::shared_ptr<HestonProcess> hestonProcess,
48 Real integrationEps = 1e-6,
49 Size maxIntegrationIterations = 10000UL);
50
51 // x=ln(S)
52 Real pdf(Real x, Time t) const override;
53 Real cdf(Real x, Time t) const override;
54 Real invcdf(Real q, Time t) const override;
55
56 private:
57 Real x_t(Real x, Time t) const;
58
59 const ext::shared_ptr<HestonProcess> hestonProcess_;
60 const Real x0_;
63 };
64}
65
66#endif
Risk neutral terminal probability density for the Heston model.
Real x_t(Real x, Time t) const
Real invcdf(Real q, Time t) const override
Real pdf(Real x, Time t) const override
Real cdf(Real x, Time t) const override
const ext::shared_ptr< HestonProcess > hestonProcess_
const DefaultType & t
Real Time
continuous quantity with 1-year units
Definition: types.hpp:62
QL_REAL Real
real number
Definition: types.hpp:50
std::size_t Size
size of a container
Definition: types.hpp:58
Definition: any.hpp:35
ext::shared_ptr< YieldTermStructure > q
interface for a single asset risk neutral terminal density calculation
Maps shared_ptr to either the boost or std implementation.