Today, currency generally refers to printed or minted money. Paper bills and coins are thought of as currency. Currency involves the exchange of goods or services for cash.

A country's price for the trade of items id referred to as exchange rates.. Floating currency means that a country's exchange rate is not fixed. Fixed currency, on the other hand, is set.

Cash was not always used as currency. Other valuable items were also used in trade exchanges. For instance, Aztecs in the fourteenth century to trade tools and clothing used cocoa beans as currency. Salt was used in many ancient civilizations. Gold dust was traded for European goods in some African countries in the seventeenth century.

Currency values can fluctuate for many reasons. Political and economic news can have immediate effect on currency values. Sometimes they are driven by speculators or by international business flows .For example, companies in the United States which are importing European products, they will need to exchange their US Dollars for Euros to pay for the products. If this is done in very large quantity over a short period of time, it raises the demand for Euros. Hence, the value of the Euro versus the US Dollar increases.

The currency market includes the Foreign Currency Market and the Euro-currency Market. The Foreign Currency Market is virtual for it exists in the dealing rooms of various central banks, large international banks, and some large corporations. The dealing rooms are connected via telephone, computer, and fax.