Definition: A fixed exchange rate is an exchange rate system in which the rate of a country's currency is established at a particular level in relation to other currencies.
Normally, a fixed exchange rate is used to match the value of different currencies in order to make investments, trade and other transactions between two countries easier to complete. With a fixed exchange rate, exporters and importers also have greater certainty for the value of traded goods.
International companies dealing in different currencies can also establish a fixed exchange rate for their base currency compared to a foreign currency.
By setting a fixed exchange rate for specified periods of time, e.g. one month at a time, companies can avoid having to deal with different exchange rates every day. At the end of the time period, the accounts of the companies can be adjusted for the currency fluctuation within the period.
Companies normally set the fixed exchange rate as the previous month's average exchange rate, as listed on exchange rate websites such as XE.
As a hypothetical example, a UK company with suppliers in the US could choose to set a fixed exchange rate for a particular month at e.g. .625 GBP:1 USD and subsequently adjust their books to account for currency fluctuations at the end of the month.
In the Reviso software, all exchange rates are updated every night. The system also retains the exchange rates historically.
Reviso also allows you to set a fixed exchange rate which you can apply to a set of currencies for a period of time chosen by you.