Change of index methodology for RDX and RDXxt

Date: 09.09.2011

Wiener Börse AG, the leading index provider in the CEE & CIS region, today announces that as of September 19, 2011 the Russian Depositary Index in EUR and USD (RDX EUR and RDX USD) and all related indices will have a new maximum weight of 20% for the highest weighted index member by index capitalization.

The upcoming adaption of the index methodology of RDX EUR and the RDX USD was concluded in order to further enhance transparency and to reduce complexity. The RDX EUR and the RDX USD will further comply with UCITS III criteria.

The new maximum weight of 20% will be reviewed on a quarterly basis.

For the Russian Depository Extendend Index in EUR und USD( RDXxt USD und RDXxt EUR, the index universe of eligble securities will be extended to securities listed on the London Main Market.