This paper studies the dynamics of the balance of payments in response to policy disturbances under the assumption that the central bank devalues the country's currency over time at a constant preannounced rate. Depending on the model parameters, a given distribution may result in qualitatively different short-run balance of payments behaviour. In each case, however, the adjustment process leads the economy to a stable long-run equilibrium provided the government finances its spending according to a certain set of rules.