Euro in Madrid. The euro was introduced to world financial markets as an accounting currency on 1 January 1999, replacing the former European Currency Unit (ECU) at a ratio of 1:1 (US$1.1743). Physical euro coins and banknotes entered into circulation on 1 January 2002, making it the day-to-day operating currency of its original members, and by March 2002 it had completely replaced the former currencies. While the euro dropped subsequently to US$0.83 within two years (26 October 2000), it has traded above the U.S. dollar since the end of 2002, peaking at US$1.60 on 18 July 2008. In late 2009, the
Euro Euro The euro (sign: €; code: EUR) is the official currency of 19 of member states of the European Union, as well as some of the territories of the EU. This group of states is known as the eurozone or euro area. It is the second largest and second most traded currency in the foreign exchange market after the United States dollar. The euro is subdivided into 100 cents. The currency is also officially used by the institutions of the European Union and its territories, four other European countries, as well as unilaterally by two others, and is consequently used