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QuantLib_YoYOptionletVolatilitySurface

NAME

QuantLib::YoYOptionletVolatilitySurface -

SYNOPSIS

#include <ql/termstructures/volatility/inflation/yoyinflationoptionletvolatilitystructure.hpp>

Inherits QuantLib::VolatilityTermStructure.

Inherited by InterpolatedYoYOptionletVolatilityCurve< Interpolator >, ConstantYoYOptionletVolatility, InterpolatedYoYOptionletVolatilityCurve< Interpolator1D >, and KInterpolatedYoYOptionletVolatilitySurface< Interpolator1D >.

Public Member Functions

virtual Volatility baseLevel () const

Constructor

 calculate the reference date based on the global evaluation date 

YoYOptionletVolatilitySurface (Natural settlementDays, const Calendar &, BusinessDayConvention bdc, const DayCounter &dc, const Period &observationLag, Frequency frequency, bool indexIsInterpolated)

virtual ~YoYOptionletVolatilitySurface ()

Volatility (only)

 

Volatility volatility (const Date &maturityDate, Rate strike, const Period &obsLag=Period(-1, Days), bool extrapolate=false) const

Volatility volatility (const Period &optionTenor, Rate strike, const Period &obsLag=Period(-1, Days), bool extrapolate=false) const
returns the volatility for a given option tenor and strike rate
virtual Volatility totalVariance (const Date &exerciseDate, Rate strike, const Period &obsLag=Period(-1, Days), bool extrapolate=false) const
Returns the total integrated variance for a given exercise date and strike rate.
virtual Volatility totalVariance (const Period &optionTenor, Rate strike, const Period &obsLag=Period(-1, Days), bool extrapolate=false) const
returns the total integrated variance for a given option tenor and strike rate
virtual Period observationLag () const

virtual Frequency frequency () const

virtual bool indexIsInterpolated () const

virtual Date baseDate () const

virtual Time timeFromBase (const Date &date, const Period &obsLag=Period(-1, Days)) const
base date will be in the past because of observation lag

Limits

 

virtual Real minStrike () const =0
the minimum strike for which the term structure can return vols
virtual Real maxStrike () const =0
the maximum strike for which the term structure can return vols

Protected Member Functions

virtual void checkRange (const Date &, Rate strike, bool extrapolate) const

virtual void checkRange (Time, Rate strike, bool extrapolate) const

virtual Volatility volatilityImpl (Time length, Rate strike) const =0

virtual void setBaseLevel (Volatility v)

Protected Attributes

Volatility baseLevel_

Period observationLag_

Frequency frequency_

bool indexIsInterpolated_

Detailed Description

Abstract interface ... no data, only results.

Basically used to change the BlackVariance() methods to totalVariance. Also deal with lagged observations of an index with a (usually different) availability lag.

Member Function Documentation

Volatility volatility (const Date & maturityDate, Rate strike, const Period & obsLag = Period(-1, Days), bool extrapolate = false) constReturns the volatility for a given maturity date and strike rate that observes inflation, by default, with the observation lag of the term structure. Because inflation is highly linked to dates (for interpolation, periods, etc) we do NOT provide a time version.

virtual Volatility totalVariance (const Date & exerciseDate, Rate strike, const Period & obsLag = Period(-1, Days), bool extrapolate = false) const [virtual]

Returns the total integrated variance for a given exercise date and strike rate. Total integrated variance is useful because it scales out t for the optionlet pricing formulae. Note that it is called 'total' because the surface does not know whether it represents Black, Bachelier or Displaced Diffusion variance. These are virtual so alternate connections between const vol and total var are possible.

Because inflation is highly linked to dates (for interpolation, periods, etc) we do NOT provide a time version

virtual Period observationLag () const [virtual]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 Volatility volatilityImpl (Time length, Rate strike) const [protected, pure virtual]Implements the actual volatility surface calculation in derived classes e.g. bilinear interpolation. N.B. does not derive the surface.

Implemented in KInterpolatedYoYOptionletVolatilitySurface< Interpolator1D >, InterpolatedYoYOptionletVolatilityCurve< Interpolator1D >, ConstantYoYOptionletVolatility, and InterpolatedYoYOptionletVolatilityCurve< Interpolator >.

Author

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