The OMX Oslo 20 Index is a new Norwegian blue-chip index. The index is composed of the 20 most traded Norwegian shares. The index is a free float market capitalization weighted index capped to comply with investment restrictions. The index captures 75% of the free float adjusted market value of the index universe resulting in a high correlation with the underlying market. It is revised twice a year after expiration on the third Friday in June and December. Standardized options and futures are available at NASDAQ OMX Derivatives market.