The EURO STOXX 50 is a stock index of Eurozone stocks designed by STOXX, an index provider owned by Deutsche Börse Group. The index is composed of 50 stocks from 11 countries in the Eurozone. EURO STOXX 50 represents Eurozone blue-chip companies considered as leaders in their respective sectors. It is made up of fifty of the largest and most liquid stocks. The index futures and options on the EURO STOXX 50, traded on Eurex, are among the most liquid products in Europe and the world. The EURO STOXX 50 was introduced on 26 February 1998. The EURO STOXX 50 Index represents some of the largest companies in the Eurozone in terms of free-float market capitalization. The index captures about 60% of the free-float market capitalization of the EURO STOXX Total Market Index, which in turn covers about 95% of the free-float market capitalization of the represented countries. The EURO STOXX 50 is one of the most liquid indices for the Eurozone. Wikipedia