Jánský, Ivo; Rippel, Milan - 2011
more volatile. The main aim of the paper is to test whether a model estimated on data with lower volatility can be used in … periods with higher volatility. The evaluation is based on the conditional coverage test and is performed on each stock index … separately. The primary result of the paper is that the volatility is best modelled using a GARCH process and that an ARMA …