Evaluation of the effect of investor psychology on an artificial stock market through its degree of efficiency Evaluación del efecto de la psicología del inversionista en un mercado bursátil artificial mediante su grado de eficiencia
Cómo citar este artículo: Sierra Suárez, K. J., et al. Predictibilidad de los retornos en el mercado de Colombia e hipótesis de mercado adaptativo. Estudios Gerenciales (2015), http://dx.información del artículo Historia del artículo: Recibido el 19 de diciembre de 2014 Aceptado el 28 de mayo de 2015 On-line el xxx Códigos JEL: C01 C22 D52 G14 Palabras clave: Predictibilidad Ratio de varianza automático Eficiencia de mercados Hipótesis de mercado adaptativor e s u m e n Los mercados eficientes son aquellos en los cuales no es posible predecir los retornos de sus activos. No obstante, la hipótesis de mercado adaptativo afirma que la eficiencia no es una característica estática de los mercados, sino que varía en el tiempo de acuerdo a las condiciones del mercado y al comportamiento de sus agentes. Este trabajo busca evaluar la predictibilidad del mercado colombiano, usando el test Ratio de varianza automático en ventanas móviles de tiempo para comprobar si es eficiente, y si la eficiencia es una característica estática o dinámica de este mercado. Los resultados muestran que los índices accionarios de Colombia presentan periodos de predictibilidad y periodos de alta incertidumbre que son consistentes con un mercado adaptativo. Predictability of returns in the Colombian stock market and the adaptive market hypothesisKeywords: Predictability Automatic variance ratio Markets efficiency Adaptive market hypothesis a b s t r a c t Efficient markets are those in which it is not possible to predict the returns on assets. However, the adaptive markets hypothesis (AMH) states that efficiency is not a static feature of markets, but varies in time according to market conditions and the behavior of its agents. This paper seeks to test the predictability of the Colombian market, using the automatic variance ratio test in moving windows, to check whether it is efficient, and if efficiency is a static or dynamic feature of this market. The results show that the stock indexes of Colombia have predictable periods and periods of high uncertainty that are consistent with an adaptive market.
Análisis comparativo de eficiencia entre Brasil, México y Estados Unidos * RESUMENEste artículo busca contrastar la eficiencia débil de los índices bursátiles de Brasil, México y Estados Unidos, desde el supuesto de que un mercado eficiente no es predecible. Con este propósito se evalúa la predictibilidad usando la prueba de rachas y el ratio de varianza automático, en el periodo 1995-2014. Los resultados evidencian que los mercados accionarios de Brasil y México han pasado de ser no eficientes a eficientes en los últimos años; en contraste, Estados Unidos muestra predictibilidad en distintos intervalos de tiempo.Palabras clave: test de rachas, ratio de varianza automático, eficiencia de mercados. JEL: C01, C22, G14Comparative efficiency analysis between Brazil, Mexico and The United States ABSTRACTThis article seeks to contrast the weak form efficiency of the Brazilian, US, and Mexican stock indexes, based on the assumption that an efficient market is not predictable. With this goal in mind, we assessed predictability using runs tests and automatic variance ratio, in the 1995-2014 period. The results shed light on the fact that, in recent years, stock markets in Brazil and Mexico have gone from being non-efficient to being efficient. In contrast, the United States shows predictability at different time intervals.
nistración. Este es un artículo de acceso abierto distribuido bajo los términos de la Licencia Creative Commons CC BY-NC-ND 4.0.
The tourism sector has an essential role in the sustainable development of a country. Therefore, in this research we propose a methodology to identify tourist routes that integrate the most important Points Of Interest in a region taking up as criteria profile characteristics in common between the sites evaluated using clustering techniques. To attain this goal, firstly, a literature review focused on compiled information used for location selection and evaluation in attraction potential sites. Then, clustering techniques are applied to identify similarities between sites, and finally, a layout of tourist routes is presented. We applied this methodology using data from a Region in Colombia. As a result, eight factors are proposed: Natural, Cultural, Tourist Plant, Infrastructure, Superstructure, Accessibility, Human and Tourist Capital and Security. From the second phase, three tourist groups were identified with three tourism factors for each of them; and then, two examples of tourist routes are proposed.
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