1. Countries - International Monetary Fund.
The Group of Ten (or G-10) refers to the group of countries that have agreed to participate in the International Monetary Fund (IMF)'s General Arrangements to Borrow (GAB), a supplementary borrowing arrangement that can be invoked if deployment of the IMF's resources under its New Arrangements to Borrow (NAB) are not accepted by the wider membership of the NAB.
The G10's membership is currently:
Belgium, Canada, France, Germany, Italy, Japan, The Netherlands, Sweden, Switzerland, United Kingdom and United States of America.
The name of the G10 was coined when it originally had exactly ten members in 1962.
Switzerland joined two years later, increasing the total membership to eleven, but the original name was retained.
2. Foreign exchange.
Collectively the currencies of the G10 countries.