This paper studies the effect of COVID-19 on the volatility of Australian stock returns and the effect of negative and … positive news (shocks) by investigating the asymmetric nature of the shocks and leverage impact on volatility. We employ a … than the GARCH model in estimating the volatility of the Australian stock returns. However, another interesting finding is …

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

volatility during the 7-year total examined time period. Splitting the time series into 3 individual sub-periods the results … conditional volatility during financial crises. Furthermore, announcements of GDP and ZEW index calm the exchange rate …'s conditional volatility during the post-crises period. Finally, announcements of GDP data and PMI index form production sector …