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/* -*- mode: c++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
Copyright (C) 2007, 2009 Chris Kenyon
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
<http://quantlib.org/license.shtml>.
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.
*/
/*! \file inflationtermstructure.hpp
\brief Base classes for inflation term structures.
*/
#ifndef quantlib_inflation_termstructure_hpp
#define quantlib_inflation_termstructure_hpp
#include <ql/termstructures/yieldtermstructure.hpp>
#include <ql/termstructures/inflation/seasonality.hpp>
namespace QuantLib {
class InflationIndex;
QL_DEPRECATED_DISABLE_WARNING
//! Interface for inflation term structures.
/*! \ingroup inflationtermstructures */
class InflationTermStructure : public TermStructure {
public:
//! \name Constructors
//@{
InflationTermStructure(Rate baseRate,
const Period& observationLag,
Frequency frequency,
const DayCounter& dayCounter = DayCounter(),
const ext::shared_ptr<Seasonality> &seasonality = ext::shared_ptr<Seasonality>());
InflationTermStructure(const Date& referenceDate,
Rate baseRate,
const Period& observationLag,
Frequency frequency,
const Calendar& calendar = Calendar(),
const DayCounter& dayCounter = DayCounter(),
const ext::shared_ptr<Seasonality> &seasonality = ext::shared_ptr<Seasonality>());
InflationTermStructure(Natural settlementDays,
const Calendar& calendar,
Rate baseRate,
const Period& observationLag,
Frequency frequency,
const DayCounter& dayCounter = DayCounter(),
const ext::shared_ptr<Seasonality> &seasonality = ext::shared_ptr<Seasonality>());
/*! \deprecated Use the constructor without the
indexIsInterpolated parameter.
Deprecated in version 1.25.
*/
QL_DEPRECATED
InflationTermStructure(Rate baseRate,
const Period& observationLag,
Frequency frequency,
bool indexIsInterpolated,
const DayCounter& dayCounter = DayCounter(),
const ext::shared_ptr<Seasonality> &seasonality = ext::shared_ptr<Seasonality>());
/*! \deprecated Use the constructor without the
indexIsInterpolated parameter.
Deprecated in version 1.25.
*/
QL_DEPRECATED
InflationTermStructure(const Date& referenceDate,
Rate baseRate,
const Period& observationLag,
Frequency frequency,
bool indexIsInterpolated,
const Calendar& calendar = Calendar(),
const DayCounter& dayCounter = DayCounter(),
const ext::shared_ptr<Seasonality> &seasonality = ext::shared_ptr<Seasonality>());
/*! \deprecated Use the constructor without the
indexIsInterpolated parameter.
Deprecated in version 1.25.
*/
QL_DEPRECATED
InflationTermStructure(Natural settlementDays,
const Calendar& calendar,
Rate baseRate,
const Period& observationLag,
Frequency frequency,
bool indexIsInterpolated,
const DayCounter& dayCounter = DayCounter(),
const ext::shared_ptr<Seasonality> &seasonality = ext::shared_ptr<Seasonality>());
//@}
//! \name Inflation interface
//@{
//! The TS observes with a lag that is usually different from the
//! availability lag of the index. An inflation rate is given,
//! by default, for the maturity requested assuming this lag.
virtual Period observationLag() const;
virtual Frequency frequency() const;
virtual Rate baseRate() const;
/*! \deprecated Don't use this method. Inflation indexes no
longer rely on the curve for interpolation.
Coupons that need to interpolate between two
index fixings should do so explicitly.
Curves can return flat rates over an inflation period.
Deprecated in version 1.25.
*/
QL_DEPRECATED
virtual bool indexIsInterpolated() const;
//! minimum (base) date
/*! Important in inflation since it starts before nominal
reference date. Changes depending whether index is
interpolated or not. When interpolated the base date
is just observation lag before nominal. When not
interpolated it is the beginning of the relevant period
(hence it is easy to create interpolated fixings from
a not-interpolated curve because interpolation, usually,
of fixings is forward looking).
*/
virtual Date baseDate() const = 0;
//@}
//! Functions to set and get seasonality.
/*! Calling setSeasonality with no arguments means unsetting
as the default is used to choose unsetting.
*/
void setSeasonality(const ext::shared_ptr<Seasonality>& seasonality =
ext::shared_ptr<Seasonality>());
ext::shared_ptr<Seasonality> seasonality() const;
bool hasSeasonality() const;
protected:
// This next part is required for piecewise- constructors
// because, for inflation, they need more than just the
// instruments to build the term structure, since the rate at
// time 0-lag is non-zero, since we deal (effectively) with
// "forwards".
virtual void setBaseRate(const Rate &r) { baseRate_ = r; }
// range-checking
void checkRange(const Date&,
bool extrapolate) const;
void checkRange(Time t,
bool extrapolate) const;
ext::shared_ptr<Seasonality> seasonality_;
Period observationLag_;
Frequency frequency_;
mutable Rate baseRate_;
/*! \deprecated Don't use this data member. Inflation indexes
no longer rely on the curve for interpolation,
and coupons that need to interpolate between two
index fixings should do so explicitly.
Curves can return flat rates over an inflation period.
Deprecated in version 1.25.
*/
QL_DEPRECATED
bool indexIsInterpolated_;
};
QL_DEPRECATED_ENABLE_WARNING
//! Interface for zero inflation term structures.
// Child classes use templates but do not want that exposed to
// general users.
class ZeroInflationTermStructure : public InflationTermStructure {
public:
//! \name Constructors
//@{
ZeroInflationTermStructure(const DayCounter& dayCounter,
Rate baseZeroRate,
const Period& lag,
Frequency frequency,
const ext::shared_ptr<Seasonality> &seasonality = ext::shared_ptr<Seasonality>());
ZeroInflationTermStructure(const Date& referenceDate,
const Calendar& calendar,
const DayCounter& dayCounter,
Rate baseZeroRate,
const Period& lag,
Frequency frequency,
const ext::shared_ptr<Seasonality>& seasonality = ext::shared_ptr<Seasonality>());
ZeroInflationTermStructure(Natural settlementDays,
const Calendar& calendar,
const DayCounter& dayCounter,
Rate baseZeroRate,
const Period& lag,
Frequency frequency,
const ext::shared_ptr<Seasonality> &seasonality = ext::shared_ptr<Seasonality>());
/*! \deprecated Use the constructor without the
indexIsInterpolated parameter.
Deprecated in version 1.25.
*/
QL_DEPRECATED
ZeroInflationTermStructure(const DayCounter& dayCounter,
Rate baseZeroRate,
const Period& lag,
Frequency frequency,
bool indexIsInterpolated,
const ext::shared_ptr<Seasonality> &seasonality = ext::shared_ptr<Seasonality>());
/*! \deprecated Use the constructor without the
indexIsInterpolated parameter.
Deprecated in version 1.25.
*/
QL_DEPRECATED
ZeroInflationTermStructure(const Date& referenceDate,
const Calendar& calendar,
const DayCounter& dayCounter,
Rate baseZeroRate,
const Period& lag,
Frequency frequency,
bool indexIsInterpolated,
const ext::shared_ptr<Seasonality>& seasonality = ext::shared_ptr<Seasonality>());
/*! \deprecated Use the constructor without the
indexIsInterpolated parameter.
Deprecated in version 1.25.
*/
QL_DEPRECATED
ZeroInflationTermStructure(Natural settlementDays,
const Calendar& calendar,
const DayCounter& dayCounter,
Rate baseZeroRate,
const Period& lag,
Frequency frequency,
bool indexIsInterpolated,
const ext::shared_ptr<Seasonality> &seasonality = ext::shared_ptr<Seasonality>());
//@}
//! \name Inspectors
//@{
//! zero-coupon inflation rate.
/*! Essentially the fair rate for a zero-coupon inflation swap
(by definition), i.e. the zero term structure uses yearly
compounding, which is assumed for ZCIIS instrument quotes.
\note by default you get the same as lag and interpolation
as the term structure.
If you want to get predictions of RPI/CPI/etc then use an
index.
*/
Rate zeroRate(const Date &d, const Period& instObsLag = Period(-1,Days),
bool forceLinearInterpolation = false,
bool extrapolate = false) const;
//! zero-coupon inflation rate.
/*! \warning Since inflation is highly linked to dates (lags,
interpolation, months for seasonality, etc) this
method cannot account for all effects. If you
call it, You'll have to manage lag, seasonality
etc. yourself.
*/
Rate zeroRate(Time t,
bool extrapolate = false) const;
//@}
protected:
//! to be defined in derived classes
virtual Rate zeroRateImpl(Time t) const = 0;
};
//! Base class for year-on-year inflation term structures.
class YoYInflationTermStructure : public InflationTermStructure {
public:
//! \name Constructors
//@{
YoYInflationTermStructure(const DayCounter& dayCounter,
Rate baseYoYRate,
const Period& lag,
Frequency frequency,
bool indexIsInterpolated,
const ext::shared_ptr<Seasonality> &seasonality = ext::shared_ptr<Seasonality>());
YoYInflationTermStructure(const Date& referenceDate,
const Calendar& calendar,
const DayCounter& dayCounter,
Rate baseYoYRate,
const Period& lag,
Frequency frequency,
bool indexIsInterpolated,
const ext::shared_ptr<Seasonality> &seasonality = ext::shared_ptr<Seasonality>());
YoYInflationTermStructure(Natural settlementDays,
const Calendar& calendar,
const DayCounter& dayCounter,
Rate baseYoYRate,
const Period& lag,
Frequency frequency,
bool indexIsInterpolated,
const ext::shared_ptr<Seasonality> &seasonality = ext::shared_ptr<Seasonality>());
//@}
//! \name Inspectors
//@{
//! year-on-year inflation rate.
/*! The forceLinearInterpolation parameter is relative to the
frequency of the TS.
\note this is not the year-on-year swap (YYIIS) rate.
*/
Rate yoyRate(const Date &d, const Period& instObsLag = Period(-1,Days),
bool forceLinearInterpolation = false,
bool extrapolate = false) const;
//! year-on-year inflation rate.
/*! \warning Since inflation is highly linked to dates (lags,
interpolation, months for seasonality, etc) this
method cannot account for all effects. If you
call it, You'll have to manage lag, seasonality
etc. yourself.
*/
Rate yoyRate(Time t,
bool extrapolate = false) const;
//@}
bool indexIsInterpolated() const override;
protected:
//! to be defined in derived classes
virtual Rate yoyRateImpl(Time time) const = 0;
};
//! utility function giving the inflation period for a given date
std::pair<Date,Date> inflationPeriod(const Date &,
Frequency);
//! utility function giving the time between two dates depending on
//! index frequency and interpolation, and a day counter
Time inflationYearFraction(Frequency ,
bool indexIsInterpolated,
const DayCounter &,
const Date &, const Date &);
// inline
inline Period InflationTermStructure::observationLag() const {
return observationLag_;
}
inline Frequency InflationTermStructure::frequency() const {
return frequency_;
}
inline bool InflationTermStructure::indexIsInterpolated() const {
QL_DEPRECATED_DISABLE_WARNING
return indexIsInterpolated_;
QL_DEPRECATED_ENABLE_WARNING
}
inline Rate InflationTermStructure::baseRate() const {
return baseRate_;
}
inline ext::shared_ptr<Seasonality> InflationTermStructure::seasonality() const {
return seasonality_;
}
inline bool InflationTermStructure::hasSeasonality() const {
return static_cast<bool>(seasonality_);
}
inline bool YoYInflationTermStructure::indexIsInterpolated() const {
QL_DEPRECATED_DISABLE_WARNING
return indexIsInterpolated_;
QL_DEPRECATED_ENABLE_WARNING
}
}
#endif
|
