DAX® tracks the performance of the 40 largest companies listed on the Regulated Market of Frankfurter Wertpapierbörse (FWB®, the Frankfurt Stock Exchange) that fulfil certain minimum quality and profitability requirements. Constituent selection is based on free-float market capitalization. Until September 20, 2021, the number of DAX components was 30.
The basic criteria for including companies in DAX are: an existing listing on the Regulated Market of the FWB (Frankfurt Stock Exchange), continuous trading on Xetra®, minimum free float of 10%, legal headquarters or operating headquarters in Germany, timely publication of audited Annual Financial Report, half-yearly Financial Reports and Quarterly Statements.
Deutsche Börse Group has been calculating DAX since July 1, 1988. In September 2019, STOXX Ltd. started administering DAX.
Index Guides, Benchmark statement, and other reports are available under the "Data & Methodology" tab.