How does WorldPay determine its foreign exchange rate used for currency conversion?
WorldPay receives quoted rates from its currency partner once a day. These rates are based on inter-bank rates (only available to the largest international banks purchasing currencies in quantities of $1million USD or more) and include a calculated value of the costs of hedging, currency conversions and foreign exchange activities needed to guarantee the rates throughout the life cycle of the transaction. These guaranteed rates are used to calculate the USD settlements as well as refunds and exchanges.
