In this article we study different time-series processes that may describe EMS exchange rate patterns. We conclude that conditional heteroskedasticity and discontinuous time paths are prominent features of EMS exchange rates. A combined jump- diffusion-ARCH model can capture these features...

The paper proposes a new multivariate model for exchange rate volatility in a system of bilateral exchange rates, using a factor structure of exchange rates one of the common factors is always related to the numeraire currency. Time variation in the volatility is modelled using a stochastic...