Option release: Reviewed rules for OMXH25 (32/07)

OMX Nordic Exchange Helsinki will, as from January 1, 2008, implement revised OMXH25 index rules.

According to the new dividend rule the index will be adjusted for cash dividends which by the company are characterized as a special dividend and for cash dividends which exceeds 10% of the last paid price on the Bank Day prior to the stock being listed ex dividend. Adjustment is carried for the part exceeding 10% of the last paid price and for dividends that are characterized as special dividend.

The calculation of expiration index will be based on auto match trades carried out in the SAXESS trading system. The requirement for external party confirmation is removed.
The free float factors will be calculated twice a year and included in the February and August review.

Please find attached new index rules.