New chart in the BUSINESS/CHARTS section: United State Dollar (USD) versus the EURO. USD is the official currency used in the United States of America. The Euro (also known as the “Anti-Dollar”) is the official currency of 15 countries in the European Union, collectively known as the Eurozone. Euro-denominated notes and coins started circulating on January 1, 2002. The Euro traces its beginnings to The Maastricht Treaty in 1992.