nonlinear volatility models (symmetric and asymmetric Generalized AutoRegressive Conditional Heteroskedasticity [GARCH … volatility of Borsa Istanbul 100 Index (BIST-100). Sample data cover the period from January 2008 to December 2017. The main …]-type models) were used to model and estimate BIST-100 volatility in response to political news. The findings of the paper …

), its volatility as well as the asymmetric effects, for the period of 12th May 2009 to 12th June, 2015. The empirical … results of GARCH-t(1,1), EGARCH-t(1,1), GJR-GARCH-t(1,1), IGARCH and the OLS methodology shows that the detection of the day …-of-theweek effect is influenced by the choice of the volatility model applied. Similarly, the highest or lowest volatility market day …