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Valoración de derivados europeos con mixtura de distribuciones Weibull

Author

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  • Andrés Mauricio Molina
  • José Alfredo Jiménez

Abstract

El modelo Black-Scholes para valoración de opciones europeas se usa bastante en el mercado por su fácil ejecución. Sin embargo, empieza a ser poco preciso en diferentes activos cuya dinámica no es de una distribución lognormal, por lo que se necesita buscar nuevas distribuciones para valorar opciones emitidas sobre diferentes activos subyacentes. Varios investigadores han trabajado en nuevas fórmulas de valoración de derivados suponiendo diferentes distribuciones ya sea para el precio del activo subyacente o para su retorno. Este artículo presenta dos fórmulas para valoración de activos: una modifica la fórmula usando una distribución de Weibull de dos parámetros propuesta por Savickas (2002) anadiendo dos nuevos parámetros (escala y localización) y otra supone que la distribución del activo es una mixtura de distribuciones de Weibull. Se presentan también comparaciones de estos modelos con otros ya existentes como Black-Scholes y el modelo de Savickas con distribución Weibull simple. ***** The Black-Scholes valuation model for European options is widely used in the stock markets due to its easy implementation. However, the model is not accurate for different assets whose dynamics do not follow those of a lognormal distribution, so it is necessary to investigate new distributions to price different options written on various underlying assets. Several researchers have worked on new valuation formulas, assuming different distributions for either the price of the underlying asset or for the return of the same. This paper presents two methods for European derivatives valuation, one of them, modifying the formula using a Weibull distribution with two parameters given by Savickas (2002) adding two new parameters (scale and location), and another assuming that the underlying distribution is a Weibull mixture. Comparisons are also presented with these models against existing models such as the Black-Scholes model and Savickas with a simple Weibull distribution.

Suggested Citation

  • Andrés Mauricio Molina & José Alfredo Jiménez, 2015. "Valoración de derivados europeos con mixtura de distribuciones Weibull," Revista Cuadernos de Economia, Universidad Nacional de Colombia, FCE, CID, March.
    • Handle: RePEc:col:000093:012720
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    References listed on IDEAS

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    1. Charles J. Corrado & Tie Su, 1996. "Skewness And Kurtosis In S&P 500 Index Returns Implied By Option Prices," Journal of Financial Research, Southern Finance Association;Southwestern Finance Association, vol. 19(2), pages 175-192, June.
    2. Black, Fischer & Scholes, Myron S, 1973. "The Pricing of Options and Corporate Liabilities," Journal of Political Economy, University of Chicago Press, vol. 81(3), pages 637-654, May-June.
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    More about this item

    Keywords

    distribución Weibull; mixtura de Weibull; valoración; opciones.;
    All these keywords.

    JEL classification:

    • C15 - Mathematical and Quantitative Methods - - Econometric and Statistical Methods and Methodology: General - - - Statistical Simulation Methods: General
    • C69 - Mathematical and Quantitative Methods - - Mathematical Methods; Programming Models; Mathematical and Simulation Modeling - - - Other
    • G13 - Financial Economics - - General Financial Markets - - - Contingent Pricing; Futures Pricing

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