Analysis and Applications of Autoregressive Moving Average Models with Stochastic Variance

It is known that volatility plays a central role in ?nancial modelling problems. This paper studies, in detail, a class of discrete time stochastic volatility (SV) models driven by ARMA models with innovations having a stochastic variances. The auto-correlation function of this class of models is derived and methods of identi?cation of such processes are described. An example is added to illustrate the development of the theory over the standard methods.GARCH models, Volatility, Stochastic variance, Innovations, Heteroscedasticity, Random, Conditional expectation, Autocorrelation, Estimation