NYSE Euronext to launch Equal Weight Versions of AEX® and CAC 40®

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22 June 2009 – NYSE Euronext (NYX) today announced the launch of two new equal weight indices based on the European national blue chip indices, the AEX and the CAC 40. The AEX Equal Weight and the CAC 40 Equal Weight are designed to be underlying for Exchange Traded Products (ETPs), by providing investors with an additional strategy of investing in NYSE Euronext blue chip securities.

All constituents of the equal weight indices will have the same weight at the review dates. This means that in the equal weight indices the stock with the smallest market cap in the underlying index will have the same weight as the stock with the largest market cap in this index. This offers investors a chance to invest in a proven equal size methodology.

NYSE Euronext to launch Equal Weight Versions of AEX and CAC 40

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About Euronext 
Euronext is the leading European capital market infrastructure, covering the entire capital markets value chain, from listing, trading, clearing, settlement and custody, to solutions for issuers and investors. Euronext runs MTS, one of Europe’s leading electronic fixed income trading markets, and Nord Pool, the European power market. Euronext also provides clearing and settlement services through Euronext Clearing and its Euronext Securities CSDs in Denmark, Italy, Norway and Portugal.
As of September 2025, Euronext’s regulated exchanges in Belgium, France, Ireland, Italy, the Netherlands, Norway and Portugal host over 1,700 listed issuers with €6.5 trillion in market capitalisation, a strong blue-chip franchise and the largest global centre for debt and fund listings. With a diverse domestic and international client base, Euronext handles 25% of European lit equity trading. Its products include equities, FX, ETFs, bonds, derivatives, commodities and indices.
In November 2025, Euronext successfully acquired a majority stake in the Athens Stock Exchange (ATHEX), further expanding its footprint and strengthening its pan-European market infrastructure.

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