Euro states; it was not a currency in its own right. They could not be set earlier, because the ECU depended on the closing exchange rate of the non-euro currencies (principally the pound sterling) that day. The procedure used to fix the conversion rate between the Greek drachma and the euro was different, since the euro by then was already two years old. While the conversion rates for the initial eleven currencies were determined only hours before the euro was introduced, the conversion rate for the Greek drachma was fixed several months beforehand. The currency was introduced in non-physical form (traveller's
History of the euro creation of the euro, and a new exchange rate mechanism (ERM II) was set up to provide stability above the euro and the national currencies of countries that hadn't yet entered the eurozone. Then, on 3 May 1998, at the European Council in Brussels, the 11 initial countries that would participate in the third stage from 1 January 1999 were selected. To participate in the new currency, member states had to meet strict criteria such as a budget deficit of less than 3% of their GDP, a debt ratio of less than 60% of GDP, low inflation, and interest rates