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New OMX Stockholm Benchmark Portfolio Selected - The New Portfolio Of The OMX Stockholm Benchmark Index Will Become Effective On December 1, 2011

Date 10/11/2011

The NASDAQ OMX Group, Inc. (NASDAQ:NDAQ) announces today the results of the semi-annual review of the OMX Stockholm Benchmark index, (NASDAQ OMX Stockholm: OMXSB), which will become effective with the market open on Thursday, December 1, 2011.

Nobia AB (NOBI), Opcon AB (OPCO), ReadSoft AB ser. B (RSOF B), Svenska Cellulosa AB SCA ser. A. (SCA A) and Sigma AB ser. B (SIGM B) will be added to the index.

Active Biotech AB (ACTI), EnQuest Plc (ENQ), Medivir AB ser. B (MVIR B), Rezidor Hotel Group AB (REZT) and SSAB AB ser. B (SSAB B) will be removed from the index.

The OMXSB index consists of the 85 largest and most traded stocks, representing all ten sectors. The weight of the stocks is based on the market value adjusted by the free float, which means that only the part of the share capital that is considered available for trading is included in the index. The index serves as an indicator of the overall trend on NASDAQ OMX Stockholm, and is intended to offer a cost effective index that an investor can fully replicate.

OMXSB is sector diversified and major sectors represented are: Financials, Industrials, Consumer Discretionary and Information Technology. The securities must also meet other eligibility criteria including a turnover screening. The OMXSB index is evaluated on a semi-annual basis in May and November, and the new index portfolio becomes effective on the first trading day in June and December respectively.