agio-+

(Greek > Italian: change; a fee charged by money brokers [changers] for exchanging money)

agio (s), agios (pl)
1. An amount charged as a premium or percentage for changing one country's currency into that of another.
2. An allowance or discount given when paying in a foreign currency to compensate for the costs of exchanging the currency.
agiotage
The business of dealing in foreign exchange.