NASDAQ OMX changes index algorithm for the OMX Oslo 20 Index effective March 1st, 2010

On March 1st, 2010 NASDAQ OMX will change the index algorithm and use
correction factor instead of adjustment amount when calculating the OMX Oslo 20
Index. The same algorithm is currently used for calculating the VINX30 index.
The reason for the change is to publish the new divisor in the morning report,
before the market opens during a corporate action adjustment, a change
requested by market participants. 

The result of the calculation will be unchanged, no new fields, columns or rows
will be added or deleted to the reports. The information in the correction
factor field will replace the adjustment amount information. 

To view an example of the difference between the old and new algorithm, please
see the notice that was sent out on the algorithm change for OMXS30 last week,
also attached in this notice. 

For further information concerning this notice please contact Michael Olsson or
Lukas Wäsström, telephone + 46 8 405 6296, e-mail index@nasdaqomx.com