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Iranian Economic Review، جلد ۲۸، شماره ۴، صفحات ۱۱۷۶-۱۲۰۲
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عنوان انگلیسی The Superiority of the EGARCH-Odd Exponentiated Skew-t Model in Predicting Financial Returns Volatility
چکیده انگلیسی مقاله The key point for volatility forecast is to utilize appropriate innovation conditional density. The specification of flexible innovation density is very essential given that it directly affects the accuracy of volatility prediction. In this work, a new odd exponentiated skew-t (OEST) innovation density is introduced for exponentiated generalized autoregressive conditional heteroscedasticity (EGARCH) models for modeling daily volatility of financial return series. The simulation via Monte Carlo experiment indicates that the estimators compared are asymptotically unbiased and consistent given that their biases converge to zero as the sample size increases. The maximum likelihood and maximum product of spacing procedures dominate the other procedures. The real dataset application based on the First bank Nigeria shock price index is given to show the performance of EGARCH model specified under OEST innovation density relative to normal, student-t, generalized error, skew normal, skew student-t, skew generalized error, generalized hyperbolic and Johnson reparametrized densities in terms of volatility accuracy. Overall, the empirical results show that EGARCH model with OEST innovation density generates better in-and out-of-samples performance than all the other models.
کلیدواژه‌های انگلیسی مقاله EGARCH Model,Estimation Methods,Financial Returns,Innovations Density,Monte-Carlo simulation
نویسندگان مقاله Obinna Damian Adubisi |
Department of Mathematics and Statistics, Federal University Wukari, Wukari, Nigeria; Department of Mathematical Sciences, Abubakar Tafawa Balewa University, Bauchi, Nigeria.

Ahmed Abdulkadir |
Department of Mathematical Sciences, Abubakar Tafawa Balewa University, Bauchi, Nigeria.

Chidi Emmanuel Adubisi |
Department of Physics, University of Ilorin, Ilorin, Nigeria.

نشانی اینترنتی https://ier.ut.ac.ir/article_100278_2c7690be078768010bf8c53219bacad7.pdf
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