The major aim of this empirical study is to estimate the volatility time series returns for a cluster of international … capture volatility clusters and changes in long and short term volatility impact. The econometric approch is based on randomly … using GARCH family models for estimating financial market volatility. Moreover, the sampled time interval includes two …

conditional volatility and strongly support the estimation of dynamic returns that allow for time-varying correlations. A …This study examines the statistical properties required to model the dynamics of both the returns and volatility series … adequately estimate long-memory dynamics in returns and volatility. The in-sample diagnostic tests as well as out …