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An Empirical Analysis of KOSPI Volatility Using GARCH-ARJI Model
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 Title & Authors
An Empirical Analysis of KOSPI Volatility Using GARCH-ARJI Model
Kim, Woo-Hwan;
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In this paper, we systematically analyzed the variation of KOSPI returns using a GARCH-ARJI(auto regressive jump intensity) model. This model is possibly to capture time varying volatility as well as time varying conditional jump intensity. Thus, we can decompose return volatility into usual variation explained by the GARCH model and unusual variation that resulted from external news or shocks. We found that the jump intensity implied on KOSPI return series clearly shows time varying. We also found that conditional volatility due to jump is generally smaller than that resulted from usual variation. We also analyzed the effect of 9.11 and the 2008 financial crisis on the volatility of KOSPI returns and conclude that there is strong and persistent impact on the KOSPI from the 2008 financial crisis.
GARCH-ARJI;jump intensity;conditional volatility;
 Cited by
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