Consumo e inversión óptimos y valuación de opciones asiáticas en un entorno estocástico con fundamentos microeconómicos y simulación Monte Carlo
- Autores: Araceli Matías González, María Teresa V. Martínez Palacios, Ambrosio Ortiz Ramírez
- Localización: Revista Mexicana de Economía y Finanzas (REMEF): nueva época, ISSN-e 2448-6795, ISSN 1665-5346, Vol. 14, Nº. 3, 2019, págs. 397-414
- Idioma: español
- DOI: 10.21919/remef.v14i3.408
- Títulos paralelos:
- Optimal consumption and investment and Asian option pricing in a stochastic environment with microeconomic foundations and Monte Carlo simulation
- Enlaces
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Resumen
- español
Resumen En esta investigación se presenta un modelo alternativo que caracteriza el precio de una opción asiática de venta del tipo europeo con precio de ejercicio variable con media aritmética suscrita sobre una acción cuya volatilidad es estocástica; mediante un sistema de ecuaciones diferenciales que proviene de un modelo de control óptimo estocástico en tiempo continuo. Para tal efecto se desarrolla un modelo de un agente racional que dispone de una riqueza inicial y enfrenta la decisión de distribuir su riqueza entre consumo e inversión en un portafolio de activos, que incluye una opción asiática de venta y europea con precio de ejercicio con media aritmética, en un horizonte temporal finito. La valuación se lleva a cabo en términos del monto que el consumidor está dispuesto a pagar por mantener su contrato de opción asiática a fin de cubrirse contra riesgo de mercado. Asimismo, se aproximan los precios de opciones europeas y asiáticas de compra y venta por simulación Monte Carlo con parámetros calibrados adaptando el modelo de Cox-Ingersoll-Ross con volatilidad realizada. La fórmula de valuación obtenida no se había determinado mediante fundamentos de racionalidad económica. La evidencia empírica señala que los precios son muy cercanos en el corto plazo, pero a largo plazo, la diferencia entre las europeas y las asiáticas aumenta.
- English
Abstract This research presents an alternative model that characterizes the price of an European-style Asian put option with variable exercise price with arithmetic average subscribed on an stock whose volatility is stochastic, through a system of differential equations that comes from a model of stochastic optimal control in continuous time. For this purpose, a model of a rational agent is developed that has an initial wealth and faces the decision of distributing its wealth between consumption and investment in a portfolio of assets, which includes an European-style Asian put option with exercise price with arithmetic average, in a finite temporal horizon. The valuation is carried out in terms of the amount that the consumer is willing to pay to maintain its Asian option contract in order to hedge against market risk. Also, prices of European and Asian call and put options are approximated by Monte Carlo simulation with calibrated parameters adapting the Cox-Ingersoll-Ross model with realized volatility. The valuation formula obtained was not determined by fundamentals of economic rationality. The empirical evidence indicates that prices are very close in the short term, but in the long term, the difference between European and Asian prices increases.
- español
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