The Benchmark Index is intended to be an investable index that comprises a representative selection of all the shares listed on Oslo Børs. Since the index is meant to be investable, shares included in the index must be relatively easy to buy and sell in the market at any time.
With effect from 1 December 2015, 2 companies will be removed from the index, while 2 companies will be added to the index.
Se the new composition here: http://www.newsweb.no/newsweb/
The Oslo Børs Benchmark Index was introduced in 2001, and replaced the former total index. Since this time, the number of companies included in the Benchmark Index has varied between 52 and 81.
The next review of the Benchmark Index will be in May 2016, with effect from 1 June 2016.