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NYSE Euronext announces the results of the September review for the AEX-index, the AMX-index and AScX-index. Please note that the changes to the indices will be effective after close of business on the third Friday of September (17 September 2010), following the index rule changes which are summarised below.
Results of the September review
AEX-index
No changes.
AMX-index
The following companies will be included (no removals):
Brunel International
Unit 4
AScX-index
The following companies will be included in the index
Dockwise
Spyker cars
The following companies will be removed from the index
Brunel International
Unit 4
Rule changes for the AEX-index family
The new rules for the AEX-index family will introduce a quarterly review cycle (March, June, September, December). The full annual review will continue to be conducted in March. The June, September and December review serve to include new entrants in case the index consists of less then 25 constituents and to facilitate inclusion of top 15 ranking non- constituents, for example recently IPO’d companies.
Also, timing of the reviews will be aligned with the expiry of index derivative contracts, and the reviews will therefore be effective after the close of business on the third Friday of the respective month.
In addition to the change in the review cycle, the calculation method of the AEX-family of indices will change. The basket method, whereby an index is calculated as the sum of a rounded number of shares for each constituent divided by a fixed divisor (100), will be replaced by the more commonly used floating divisor method which uses the non rounded number of listed shares for each constituent as a starting point. The floating divisor method will eliminate rounding issues at the reviews, and will allow for more accurate corporate action adjustments.
The rule changes are part of a programme to limit differences in the methodologies of NYSE Euronext’s blue chip indices across Europe and to bring them in line with industry best practices, making them easier to understand and use by a broader group of customers.
For full details of the rule changes for our blue chip indices please go to http://www.euronext.com/fic/000/057/553/575538.pdf
