The OMX Nordic 40 is a stock market index for the pan-regional Nasdaq Nordic. It is a capitalization-weighted index, created on October 2, 2006, that consists of the 40 most-traded stock classes of shares from the four stock markets operated by the OMX Group in four of the Nordic countries - Copenhagen, Helsinki, Reykjavík and Stockholm. The base date for the index is December 28, 2001, with a base value of 1000. Wikipedia