We study the impact of positive and negative macroeconomic US and European news announcements in different phases of the business cycle on the highfrequency volatility of the EUR/USD exchange rate. The results suggest that in general bad news increases volatility more than good news. The news...

In this paper, we incorporate time-varying mixing probabilities into univariate and bivariate mixture multiplicative error models. Switching between the regimes is governed by an observable predetermined variable. The models are applicable to positive-valued time series, and are particularly...