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.

MDAX® focuses on midcap companies by tracking the performance of the 50 stocks which follow DAX® companies in terms of size or that are not eligible for DAX inclusion because they don’t fulfil its profitability requirement and that fulfil minimum quality requirements. The selection of index components is based on free float market capitalization. The index weighting of an individual share is capped at 15%.

The basic criteria for including companies in MDAX 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.

The number of holdings was decreased from 60 to 50 on September 20, 2021.

Index Guides, Benchmark statement, and other reports are available under the "Data & Methodology" tab.

SDAX® focuses on smaller companies by tracking the performance of the 70 companies which follow after MDAX® companies in terms of size and that fulfill minimum quality requirements. The selection of index components is based on free-float market capitalization. The index weighting of an individual share is capped at 15%.

The basic criteria for including companies in SDAX 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.

Index Guides, Benchmark statement, and other reports are available under the "Data & Methodology" tab.

TecDAX® includes the 30 largest companies classified as belonging to the “technology” sector and that fulfil minimum quality requirements. The selection of index components is based on free float market capitalization. The index weighting of an individual share is capped at 15%.

The basic criteria for including companies in TecDAX 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.

Index Guides, Benchmark statement, and other reports are available under the "Data & Methodology" tab.