New OMX Stockholm Benchmark Portfolio Selected

May 9, 2011
New OMX Stockholm Benchmark Portfolio Selected

The new portfolio of the OMX Stockholm Benchmark index will become effective on June 1, 2011

Stockholm, May 9, 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 Wednesday, June 1, 2011.

Addnode AB (ANOD B), Etrion Corporation (ETX), Hexagon AB (HEXA B), Höganäs AB (HOGA B), Medivir AB (MVIR B), Millicom International Cellular (MIC SDB), and Proffice AB (PROE B) will be added to the index.

CDON Group AB (CDON), Cybercom Group AB (CYBE), Enea AB (ENEA), Eniro AB (ENRO), Gunnebo AB (GUNN), Nokia Corporation (NOKI SEK), Svenska Cellulosa AB SCA ser A. (SCA A) and Swedish Orphan Biovitrum AB (SOBI) will be removed from the index.

"We are glad to see that several large and highly liquid companies are entering the OMX Stockholm Benchmark index, which is one of the most used Swedish benchmark indexes amongst portfolio managers and institutional investors, said Magdalena Hartman, Vice President NASDAQ OMX Global Index Group. The index is designed to act as a transparent and liquid benchmark with low transaction costs for the investors. The OMX Stockholm Benchmark index has proven itself over the years to closely mirror the Swedish equity market with a correlation of 99,9 % but with only 86 companies in the index.

The OMXSB index consists of the 86 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.

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NASDAQ OMX Media Contact:
Carl Norell
+46 8 405 66 39
carl.norell@nasdaqomx.com

About NASDAQ OMX Index Products
NASDAQ OMX is a global leader in creating and licensing strategy indexes and is home to the most widely watched indexes in the world. As a premier, full-service provider, NASDAQ OMX is dedicated to designing powerful indexes that are in sync with a continually changing market environment. Utilizing the expanded coverage of our global company, NASDAQ OMX has more than 1,500 diverse equity, commodity and fixed-income indexes in the U.S., Europe, and throughout world. In addition, our calculation, licensing and marketing support provide the tools to measure and replicate global markets. The NASDAQ OMX Index Group range of services covers the entire business process from index design to calculation and dissemination. For more information about NASDAQ OMX indexes, visit https://indexes.nasdaqomx.com/.

About NASDAQ OMX
The NASDAQ OMX Group, Inc. is the world's largest exchange company. It delivers trading, exchange technology and public company services across six continents, with approximately 3,600 listed companies. NASDAQ OMX offers multiple capital raising solutions to companies around the globe, including its U.S. listings market, NASDAQ OMX Nordic, NASDAQ OMX Baltic, NASDAQ OMX First North, and the U.S. 144A sector. The company offers trading across multiple asset classes including equities, derivatives, debt, commodities, structured products and exchange-traded funds. NASDAQ OMX technology supports the operations of over 70 exchanges, clearing organizations and central securities depositories in more than 50 countries. NASDAQ OMX Nordic and NASDAQ OMX Baltic are not legal entities but describe the common offering from NASDAQ OMX exchanges in Helsinki, Copenhagen, Stockholm, Iceland, Tallinn, Riga, and Vilnius. For more information about NASDAQ OMX, visit http://www.nasdaqomx.com.

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The matters described herein contain forward-looking statements that are made under the Safe Harbor provisions of the Private Securities Litigation Reform Act of 1995. These statements include, but are not limited to, statements about NASDAQ OMX's products and offerings. We caution that these statements are not guarantees of future performance. Actual results may differ materially from those expressed or implied in the forward-looking statements. Forward-looking statements involve a number of risks, uncertainties or other factors beyond NASDAQ OMX's control. These factors include, but are not limited to factors detailed in NASDAQ OMX's annual report on Form 10-K, and periodic reports filed with the U.S. Securities and Exchange Commission. We undertake no obligation to release any revisions to any forward-looking statements.