The G10 currencies are 10 of the most heavily traded currencies in the world, which are also the world's most liquid. Traders regularly buy and sell them in an open market with minimal impact on their own international exchange rates.
The origin of the term G10 currencies is not clear, however it may be derived from the G-10 countries and their agreement to participate in the IMF General Arrangements to Borrow (GAB). There is no longer a one-to-one match between the G10 currencies and the G10 countries.
The G10 currencies are the United States dollar, the euro, the Japanese yen, the British pound sterling, the Swiss franc, the Australian dollar, the New Zealand dollar, the Canadian dollar, the Swedish krona, and the Norwegian krone.
In some banking circles, reference is made to the G11 currencies, which are the G10 currencies plus the Danish krone.