Wikipedia
ÖkoDAX
ÖkoDAX is a German stock market index which includes ten companies in the renewable energy sector. It was introduced on 4 June 2007. The constituting companies and their weightings are reviewed quarterly (March, June, September and December). The companies should be represented with equal proportions (i.e. 10%). The ÖkoDAX is calculated as a performance index as well as a price index.