Testing for intraday interdependence and volatility spillover among the euro, the pound and the Swiss franc markets

To examine intraday interdependence and volatility spillover among the euro, the pound and the Swiss franc, we employ the varying-correlation model of multivariate generalized autoregressive conditional heteroskedasticity. Our main findings are (1) return volatility in the euro spills into the pound and the Swiss franc; and (2) these markets are highly integrated with the euro, and the degree of interdependence is state-dependent: euro news has a simultaneous impact on the pound and the Swiss franc, and co-movements of these currencies and the euro become much higher in proportion to the arrival of news of the euro.