Empirical Regularities of Financial Market Volatility and Good Modelling Process: Developing Countries' Exchange Rate Markets Perspective

Kwame Osei-Assibey

International Economic Journal, 2015, vol. 29, issue 4, 547-570

Abstract: A survey of contemporary literature suggests that empirical studies on developing economies are few or almost non-existent. Engle and Patton (2001, What good is a volatility model. Quantitative Finance , 1 , 237-245) as well as Poon (2005, A Practical Guide to Forecasting Financial Market Volatility . New Jersey: Wiley.) suggest that a good volatility model is one that utilizes the empirical regularities of financial market volatility (of which most were observed on industrialized economies markets). This paper uses exchange rate series from Ghana, Mozambique and Tanzania to show that; they are not different from other financial markets as they exhibit most of the empirical regularities including volatility sign asymmetry, non-normal distribution and volatility clustering. It is however observed that the three exchange rate series are very volatile, with induced volatile shocks highly persistent and asymmetric, and extreme prices commonplace; the ARCH technique (which has been well documented to capture these empirical regularities and produce good forecasts) generally produced a good fit to the three exchange rate series when compared with volatility forecasts generated using the EWMA technique. In the simple analysis of a day-ahead volatility forecast abilities of estimated models, it was observed that best fit does not necessarily ensure best forecast.

Date: 2015
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DOI: 10.1080/10168737.2015.1081258

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