Русско-англо-русский юридический словарь

Currency intervention, also known as currency manipulation, exchange rate intervention or foreign exchange market intervention, is the purchase or the sale of the currency on the exchange market by the fiscal authority or the monetary authority, in order to influence the value of the domestic currency. (Wikipedia)

Foreign exchange risk (also known as FX risk, exchange rate risk or currency risk) is a financial risk that exists when a financial transaction is denominated in a currency other than that of the base currency of the company. Foreign exchange risk also exists when the foreign subsidiary of a firm maintains financial statements in a currency other than the reporting currency of the consolidated entity. The risk is that there may be an adverse movement in the exchange rate of the denomination currency in relation to the base currency before the date when the transaction is completed. (Wikipedia)

monetary union Two or more countries with a single currency, or different currencies having a fixed mutual exchange rate monitored and controlled by one central bank (or several central banks with closely coordinated monetary policies). (BusinessDictionary)

Currency war, also known as competitive devaluation, is a condition in international affairs where countries compete against each other to achieve a relatively low exchange rate for their own currency. (Wikipedia)