Module net.finmath.lib
Package net.finmath.marketdata.model.volatilities

Class CapletVolatilitiesParametricFourParameterPicewiseConstant

java.lang.Object
net.finmath.marketdata.model.volatilities.AbstractVolatilitySurface
net.finmath.marketdata.model.volatilities.AbstractVolatilitySurfaceParametric
net.finmath.marketdata.model.volatilities.CapletVolatilitiesParametricFourParameterPicewiseConstant
All Implemented Interfaces:
Cloneable, ParameterObject, VolatilitySurface
public class CapletVolatilitiesParametricFourParameterPicewiseConstant extends AbstractVolatilitySurfaceParametric
A parametric caplet volatility surface created form the picewise constant (numerical integration) of the four parameter model for the instantaneous forward rate volatility given by \( \sigma(t) = (a + b t) \exp(- c t) + d \). In other words, the Black volatility for maturity T is given by \[ \sqrt{ \frac{1}{t_{n}} \sum_{i=0}^{n-1} ((a + b t_{i}) \exp(- c t_{i}) + d)^2 (t_{i+1}-t_{i}) } \], where \( t_{i} \) is given time discretization.
Version:
1.0
Author:
Christian Fries

  • Constructor Details

    • CapletVolatilitiesParametricFourParameterPicewiseConstant

      public CapletVolatilitiesParametricFourParameterPicewiseConstant​(String name, LocalDate referenceDate, double a, double b, double c, double d, TimeDiscretization timeDiscretization)
      Create a model with parameters a,b,c,d.
      Parameters:
      name - The name of this volatility surface.
      referenceDate - The reference date for this volatility surface, i.e., the date which defined t=0.
      a - The parameter a
      b - The parameter b
      c - The parameter c
      d - The parameter d
      timeDiscretization - The timeDiscretizationFromArray used in numerical integration.

  • Method Details

    • getValue

      public double getValue​(double maturity, double strike, VolatilitySurface.QuotingConvention quotingConvention)
      Description copied from interface: VolatilitySurface
      Returns the price or implied volatility for the corresponding maturity and strike.
      Parameters:
      maturity - The option maturity for which the price or implied volatility is requested.
      strike - The option strike for which the price or implied volatility is requested.
      quotingConvention - The quoting convention to be used for the return value.
      Returns:
      The price or implied volatility depending on the quoting convention.

    • getValue

      public double getValue​(AnalyticModel model, double maturity, double strike, VolatilitySurface.QuotingConvention quotingConvention)
      Description copied from interface: VolatilitySurface
      Returns the price or implied volatility for the corresponding maturity and strike.
      Parameters:
      model - An analytic model providing a context. Some curves do not need this (may be null).
      maturity - The option maturity for which the price or implied volatility is requested.
      strike - The option strike for which the price or implied volatility is requested.
      quotingConvention - The quoting convention to be used for the return value.
      Returns:
      The price or implied volatility depending on the quoting convention.

    • getParameter

      public double[] getParameter()
      Description copied from interface: ParameterObject
      Get the current parameter associated with the state of the objects.
      Returns:
      The parameter.

    • setParameter

      public void setParameter​(double[] parameter)
      Description copied from interface: ParameterObject
      Set the current parameter and change the state of the objects.
      Parameters:
      parameter - The parameter associated with the new state of the objects.

    • getCloneForParameter

      public AbstractVolatilitySurfaceParametric getCloneForParameter​(double[] value) throws CloneNotSupportedException
      Description copied from class: AbstractVolatilitySurfaceParametric
      Returns a clone of this volatility surface with modified parameters.
      Specified by:
      getCloneForParameter in interface ParameterObject
      Specified by:
      getCloneForParameter in class AbstractVolatilitySurfaceParametric
      Parameters:
      value - Parameter array.
      Returns:
      Clone with new parameters.
      Throws:
      CloneNotSupportedException - Thrown if this object cannot be cloned.