Controls imposed by a government on the purchase/sale of foreign currencies / From Wikipedia, the free encyclopedia
Foreign exchange controls are various forms of controls imposed by a government on the purchase/sale of foreign currencies by residents, on the purchase/sale of local currency by nonresidents, or the transfers of any currency across national borders. These controls allow countries to better manage their economies by controlling the inflow and outflow of currency, which may otherwise create exchange rate volatility. Countries with weak and/or developing economies generally use foreign exchange controls to limit speculation against their currencies. They may also introduce capital controls, which limit foreign investment in the country.
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Four exchange control stamps in a South African passport from the mid-1980s allowing the passport holder to take a particular amount of currency out of the country. Exchange controls such as these were imposed by the apartheid-era South African government to restrict the outflow of capital from the country