From Traderpedia

An index comprising the thirty largest and most actively traded German companies that are listed on the Frankfurt Stock Exchange.

The DAX 30 Index reflects the German blue chip segment.

[edit] History

It was established as the benchmark German index in 1959 when it took over from the Borsen-Zeitung Index. Only the publicly available or "free float" stock issued is taken into account when assessing companies for inclusion in the index.

[edit] Calculation

The DAX is a total return index in so far as it represents the value of the dividend payments as well as the price of its constituents.