NASDAQ OMX changes index algorithm for the OMX Stockholm indexes 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
Stockholm indexes, including OMX Stockholm Benchmark Index. The same algorithm
is currently used for calculating the VINX indexes. 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. Please see attached file with list of indexes affected by this
change. 

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