1. The practice of buying and selling foreign currency or securities to profit from fluctuations in exchange rates or prices.
Usage: finance; often implies speculation or manipulation
2. A premium or percentage charged by a money changer or broker for exchanging currency.
Usage: historical; finance

Examples

• The trader engaged in agiotage, buying euros low and selling them high to maximize profit.
• During the financial crisis, agiotage in foreign exchange markets increased dramatically.
• Medieval money changers charged agiotage for converting one currency to another.
• Speculators made fortunes through agiotage when the currency markets became volatile.
• The bank's agiotage operations generated significant revenue from currency fluctuations.