OMX Helsinki 25 is the Helsinki Stock Exchange leading share index. The index consists of the 25 most actively traded stocks on the Helsinki Stock Exchange. The limited number of constituents guarantees that all the underlying shares of the index have excellent liquidity, which results in an index that is highly suitable as underlying for derivatives products. OMXH25 is used as a benchmark index for management of diversified Finnish stock portfolios. Options and futures on OMXH25 are traded at Eurex. The OMXH25 Index is a capitalization weighted stock price index. The maximum weight of one company is limited to 10 percent. The composition of the OMXH25 index is revised twice a year. The numbers of shares used to compute the market value are determined on a quarterly basis. This version of the index; the OMXH25GI is a market weighted total return index. The base date for OMXH25GI is December 30, 2013 with a base value of 2835,17.