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首页> 外文期刊>Journal of Statistical and Econometric Methods >Does heavy-tailedness matter in regime shifts and persistence in volatility estimation? Evidence from six GCC economies
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Does heavy-tailedness matter in regime shifts and persistence in volatility estimation? Evidence from six GCC economies

机译:重尾是否对政权转移和波动率估计的持久性有影响?来自六个海湾合作委员会经济体的证据

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This study examines the regime shifts in volatility in the stock markets of Gulf Cooperation Council (GCC) countries by employing the iterated cumulative sum of squares generalized autoregressive conditional heteroscedasticity (ICSSGARCH) model. Using the weekly data over the period 2003-2010, the GARCH models are estimated accounting for the sudden shifts detected by ICSS algorithm. The unexpected changes in stock price volatility seem to arise from the important global, regional, and domestic political as well as economic events. The findings also suggest that the ignorance of structural changes in volatility seems to lead to overestimation of persistence parameters of GARCH models. This finding corroborates many earlier studies in this context.
机译:本研究通过采用平方的平方累积广义和自回归条件异方差(ICSSGARCH)模型,考察了海湾合作委员会(GCC)国家股票市场的波动性制度变化。使用2003-2010年期间的每周数据,对GARCH模型进行了估计,以解决由ICSS算法检测到的突然变化。股价波动的出乎意料的变化似乎是由重要的全球,区域和国内政治以及经济事件引起的。研究结果还表明,对波动性结构变化的无知似乎导致对GARCH模型的持久性参数的高估。这一发现证实了在此背景下的许多早期研究。

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