QuantLib: a free/open-source library for quantitative finance
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simplelocalestimator.hpp
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1/* -*- mode: c++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2
3/*
4 Copyright (C) 2006 Joseph Wang
5
6 This file is part of QuantLib, a free-software/open-source library
7 for financial quantitative analysts and developers - http://quantlib.org/
8
9 QuantLib is free software: you can redistribute it and/or modify it
10 under the terms of the QuantLib license. You should have received a
11 copy of the license along with this program; if not, please email
12 <quantlib-dev@lists.sf.net>. The license is also available online at
13 <http://quantlib.org/license.shtml>.
14
15 This program is distributed in the hope that it will be useful, but WITHOUT
16 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
17 FOR A PARTICULAR PURPOSE. See the license for more details.
18*/
19
20/*! \file simplelocalestimator.hpp
21 \brief Constant volatility estimator
22*/
23
24#ifndef quantlib_simple_local_estimator_hpp
25#define quantlib_simple_local_estimator_hpp
26
28#include <map>
29
30namespace QuantLib {
31
32 //! Local-estimator volatility model
33 /*! Volatilities are assumed to be expressed on an annual basis.
34 */
36 public LocalVolatilityEstimator<Real> {
37 private:
39 public:
42 TimeSeries<Volatility> calculate(const TimeSeries<Real>& quoteSeries) override {
44 TimeSeries<Real>::const_iterator prev, next, cur, start;
45 start = quoteSeries.begin();
46 ++start;
47 for (cur = start; cur != quoteSeries.end(); ++cur) {
48 prev = cur; --prev;
49 retval[cur->first] =
50 std::fabs(std::log(cur->second/prev->second))/
51 std::sqrt(yearFraction_);
52 }
53 return retval;
54 }
55 };
56
57}
58
59
60#endif
Local-estimator volatility model.
TimeSeries< Volatility > calculate(const TimeSeries< Real > &quoteSeries) override
Container for historical data.
Definition: timeseries.hpp:51
Container::const_iterator const_iterator
Definition: timeseries.hpp:110
const_iterator begin() const
Definition: timeseries.hpp:158
const_iterator end() const
Definition: timeseries.hpp:159
QL_REAL Real
real number
Definition: types.hpp:50
Definition: any.hpp:35
Volatility term structures.