The EURO STOXX 50 is a stock index of Eurozone stocks designed by STOXX, an index provider owned by Deutsche Börse Group. As of April 2021, the index is dominated by France and Germany. According to STOXX, its goal is "to provide a blue-chip representation of Supersector leaders in the Eurozone". 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. Its composition is reviewed annually in September. The index is available in several currency and return variant combinations. Calculation takes place every 15 seconds between 09:00 CET and 18:00 CET for the EUR and USD variants of any return type, while the CAD, GBP and JPY variants are available as end-of-day calculation only. The EURO STOXX 50 Index is derived from the 19 EURO STOXX regional Supersector indices and represents the largest super-sector leaders in the Eurozone in terms of free-float market capitalization. Wikipedia