Freihube, Thorsten; Theissen, Erik - In: Schmalenbach Business Review (sbr) 53 (2001) 4, pp. 295-320
Before June 1999, Deutsche Börse AG published two parallel index values, one calculated from floor prices and the other from Xetra prices. Since 1999, Deutsche Börse has calculated the DAX blue-chip index and the MDAX mid-cap index using only the prices of the electronic trading system Xetra....
