org.jquantlib.termstructures.volatilities

Class BlackVarianceCurve

java.lang.Object

org.jquantlib.termstructures.AbstractTermStructure

org.jquantlib.termstructures.volatilities.VolatilityTermStructure

org.jquantlib.termstructures.BlackVolTermStructure

org.jquantlib.termstructures.BlackVarianceTermStructure

org.jquantlib.termstructures.volatilities.BlackVarianceCurve

All Implemented Interfaces:

Extrapolator, TermStructure, Observable, Observer, PolymorphicVisitable

public class BlackVarianceCurve
extends BlackVarianceTermStructure

Black volatility curve modelled as variance curve

This class calculates time-dependent Black volatilities using as input a vector of (ATM) Black volatilities observed in the market.

The calculation is performed interpolating on the variance curve. Linear interpolation is used as default; this can be changed by the setInterpolation() method.

For strike dependence, see BlackVarianceSurface.

Constructor Summary

Constructors

Constructor and Description
BlackVarianceCurve(Date referenceDate, Date[] dates, double[] blackVolCurve, DayCounter dayCounter)
BlackVarianceCurve(Date referenceDate, Date[] dates, double[] blackVolCurve, DayCounter dayCounter, boolean forceMonotoneVariance)

Method Summary

Modifier and Type	Method and Description
void	accept(PolymorphicVisitor pv) This method is intended to extend the semantics of method Visitable.accept(Visitor)
DayCounter	dayCounter() Return the day counter used for date/double conversion
Date	maxDate()
double	maxStrike() The maximum strike for which the term structure can return vols
double	minStrike() The minimum strike for which the term structure can return vols
void	setInterpolation()
void	setInterpolation(Interpolation.Interpolator factory)

Methods inherited from class org.jquantlib.termstructures.BlackVolTermStructure

blackForwardVariance, blackForwardVariance, blackForwardVol, blackForwardVol, blackVariance, blackVariance, blackVariance, blackVariance, blackVol, blackVol, blackVol, blackVol

Methods inherited from class org.jquantlib.termstructures.volatilities.VolatilityTermStructure

businessDayConvention, optionDateFromTenor

Methods inherited from class org.jquantlib.termstructures.AbstractTermStructure

addObserver, allowsExtrapolation, calendar, countObservers, deleteObserver, deleteObservers, disableExtrapolation, enableExtrapolation, getObservers, maxTime, notifyObservers, notifyObservers, referenceDate, settlementDays, timeFromReference, update

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

BlackVarianceCurve

public BlackVarianceCurve(Date referenceDate,
                          Date[] dates,
                          double[] blackVolCurve,
                          DayCounter dayCounter)

BlackVarianceCurve

public BlackVarianceCurve(Date referenceDate,
                          Date[] dates,
                          double[] blackVolCurve,
                          DayCounter dayCounter,
                          boolean forceMonotoneVariance)

Method Detail

setInterpolation

public void setInterpolation()

setInterpolation

public final void setInterpolation(Interpolation.Interpolator factory)

dayCounter

public final DayCounter dayCounter()

Description copied from interface: TermStructure

Return the day counter used for date/double conversion

Specified by:

dayCounter in interface TermStructure

Overrides:

dayCounter in class AbstractTermStructure

Returns:

the day counter used for date/double conversion

maxDate

public final Date maxDate()

Returns:

the latest date for which the curve can return values

minStrike

public final double minStrike()

Description copied from class: BlackVolTermStructure

The minimum strike for which the term structure can return vols

Specified by:

minStrike in class BlackVolTermStructure

maxStrike

public final double maxStrike()

Description copied from class: BlackVolTermStructure

The maximum strike for which the term structure can return vols

Specified by:

maxStrike in class BlackVolTermStructure

accept

public void accept(PolymorphicVisitor pv)

Description copied from interface: PolymorphicVisitable

This method is intended to extend the semantics of method Visitable.accept(Visitor)

In a conventional Visitor design pattern, the accept method is called when access to visit a data structure is requested. A Visitor object is passed as argument in case permission is granted to that Visitor to access the data structure. Obviously, Visitors and Visitables work in pairs and the class which provides the data structure to be visited also implements Visitable in order to properly grant access when the expected Visitor is received.

In the case of a PolymorphicVisitable, a PolymorphicVisitor is passed instead of a Visitor. A PolymorphicVisitor is in fact, a composition of Visitors and not only a single Visitor. A PolymorphicVisitor is responsible for returning the correct Visitor responsible for processing a certain data structure.

The initial design of pairs made of <Visitor,Visitable> is extended to a concept of a matrix made of multiple Visitors against multiple Visitables. Every class which implements PolymorphicVisitable passes different data structures when querying PolymorphicVisitors.

Specified by:

accept in interface PolymorphicVisitable

Overrides:

accept in class BlackVarianceTermStructure

See Also:

PolymorphicVisitor#getVisitor(Class)