کنترل سرمایه و سرعت نوسانات ارز

• We offer a model for evaluating the effects of a trading tax on FX transactions.• Taxes and the price stickiness mechanism are taken into account in the model.• Taxes on FX transactions discourage speculation by rising currency trading costs.• The analysis matches insight into the Chilean case after using capital control rule.The study offers one conceptual and theoretical framework for evaluating the economic effects of a trading tax on foreign exchange transactions. Taxes and the price stickiness mechanism are taken into account in the model. When prices are flexible, full monetary neutrality can be obtained even in the short-term. Intuitively, taxes on foreign exchange transactions discourage speculation by rising currency trading costs, and, thus, increase the stability of the exchange rate. Finally, the results show that not only the exchange rate but consumption, investment and employment will become less volatile by imposing trading taxes on foreign exchange transactions.