An alternative approach to the calibration of the Vasicek and CIR interest rate models via generating functions
Marianito R. Rodrigo and
Rogemar S. Mamon
Quantitative Finance, 2014, vol. 14, issue 11, 1961-1970
We propose a new method to calibrate the Vasicek and Cox--Ingersoll--Ross interest rate models from bond prices. We define an appropriate generating function and derive recursive relations between the derivatives of the generating function and the bond prices. The parameters of the Vasicek and CIR models are then obtained by solving a system of linearly independent equations arising from the recursive relations. We include numerical results that show the method's accuracy when bond prices generated from the exact formulas are used.
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