This paper develops a model for valuing options on a currency which is maintained within a band. The starting point of our model is the well known Krugman model for exchange-rate behavior within a target zone. Results from model runs provide insight into evidence reported by other authors of...

This paper extends the Krugman target zone model by including a realignment mechanism. Various properties of that realignment mechanism are discussed. The movement of the exchange rate is governed both by a Wiener process on fundamental and by a Poisson jump process with endogenous realignment...

This paper shows how to value options with stochastic lives, i.e. options which may be cancelled but where the underlying stocks retain their value. The executive stock option, which is cancelled if the executive takes a job in another firm, is a typical example. The paper also contains a...