A stock index is a stock market index in a stock market. It is a key figure for the development of selected stock prices in this stock market. It is intended to document the development of global financial activities in this sub-market in a representative manner. Share indices are generally suitable as a simple, yet useful mood barometer ("stock market barometer") for individual economies or specific economic sectors. Criteria for the weighting of the shares in the index include the market capitalization and the respective stock exchange turnover of the company. The indices on platform 1: