The OBX composition from and including 21st December 2007 to and including 19th June 2008 has now been determined, please see below. Leaving the OBX is AKER (Aker ASA), entering the OBX is AKY (Aker Yards ASA). The OBX composition is based on the 25 most liquid stocks traded on Oslo Børs in the previous 6-month period, 1st June 2007 – 30th November 2007.