The OMX Iceland 15 is a stock market index for the largest and most traded stocks on the Nasdaq Iceland stock exchange. It is a price return and capitalization-weighted index. The base date for the index is 31 December 2008, with a base value of 1,000. The index is reconstituted and rebalanced semi-annually on the first trading day in January and July. There is also a total return version of the OMX Iceland 15 index, the OMX Iceland 15 Gross Index. Unlike the regular OMXI15 index, the OMXI15GI includes reinvested dividends. Wikipedia