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Valor en riesgo de los activos financieros colombianos aplicando la teoria de valor extremo

Authors: Pamela Andrea Cardozo-Ortiz;

Valor en riesgo de los activos financieros colombianos aplicando la teoria de valor extremo

Abstract

Desde finales de los anos 80 el sistema financiero colombiano ha experimentado cambios fundamentales acompanados de una 05r volatilidad del entorno en que se desenvuelve la actividad financiera. Como parte del fortalecimiento de la regulacion prudencial, desde el 2000 en Colombia, se esta supervisando el riesgo de mercado medido a traves del Valor en Riesgo (VeR). El VeR se define como la maxima perdida potencial en el valor de un activo o portafolio, dada una probabilidad, debido a cambios en los precios del mercado, en un horizonte de tiempo determinado. Para obtener el VeR de un activo generalmente se supone que los retornos siguen una distribucion normal, sin embargo existe gran evidencia de que esta no se ajusta en forma correcta a la serie de retornos financieros. En este estudio se utiliza la teoria de valor extremo (TVE) para obtener el VeR de 6 activos financieros colombianos utilizando el metodo de Picos sobre un umbral (Peaks over Thresholds (POT)) mostrando que la distribucion normal no se ajusta a la distribucion de los retornos de los activos colombianos. Se modela de forma satisfactoria la distribucion de las series, bajo el supuesto de observaciones independientes e identicamente distribuidas, especialmente en la parte extrema de la distribucion. Se compara el VeR obtenido (VeR TVE) y el VeR bajo el supuesto de distribucion normal con los retornos reales dando como resultado un mejor ajuste del VeR de TVE. En el ultimo examen de desempeno, la hipotesis nula de que el modelo realiza una buena estimacion es rechazada 11 veces por el metodo tradicional (distribucion normal) mientras que el metodo de TVE lo hace 6 veces.

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
hybrid