There is no dearth of research in the area of Optimal Hedge Ratio estimation. The general consent goes towards use of Multivariate Generalized Autoregressive Conditionally Heteroscedastic (MGARCH) model because of superior outcomes having low portfolio volatilities over other models (like: OLS...

Long memory is found in the conditional volatilities of financial returns measured at daily or higher frequencies, as well as in residual cross-products in bivariate series. We test for long memory in conditional correlations by extending the fractionally integrated GARCH model to include...