Correction in day of index rebalance: Semi-annual review of OMX Copenhagen 20 Indexes

NASDAQ OMX reports the following changes in the OMXC20 Indexes composition in this semi-annual review:

Jyske Bank A/S will enter the portfolio.

NKT Holding will exit the portfolio.

The constituents of the OMXC20 index family are a selection of the largest and most actively traded shares on the Copenhagen Stock Exchange. The composition of the OMXC20 indexes is revised twice a year in June and December. The index weights are based on free float adjusted market cap to ensure that only the part of the shares that is considered available for trading is included in the indexes.

The OMX Copenhagen 20 Indexes constituents effective December 27, 2012 are:

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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 nearly 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/.

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The inventor of the electronic exchange, The NASDAQ OMX Group, Inc., fuels economies and provides transformative technologies for the entire lifecycle of a trade - from risk management to trade to surveillance to clearing. In the U.S. and Europe, we own and operate 24 markets, 3 clearinghouses and 5 central securities depositories supporting equities, options, fixed income, derivatives, commodities, futures and structured products. Able to process more than 1 million messages per second at sub-40 microsecond speeds with 99.999% uptime, our technology drives more than 70 marketplaces in 50 developed and emerging countries into the future, powering 1 in 10 of the world’s securities transactions. Our award-winning data products and worldwide indexes are the benchmarks in the financial industry. Home to approximately 3,400 listed companies worth $6 trillion in market cap whose innovations shape our world, we give the ideas of tomorrow access to capital today. Welcome to where the world takes a big leap forward, daily.  Welcome to the NASDAQ OMX Century.  To learn more, visit www.nasdaqomx.com. Follow us on Facebook (http://www.facebook.com/NASDAQ) and Twitter (http://www.twitter.com/nasdaqomx). (Symbol: NDAQ and member of S&P 500)

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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. There can be no assurance that the FSA will give the NASDAQ OMX applicant the authorization and permissions which it seeks.

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Media Contacts:

Javier Lopez Garrido

+45 33 77 04 30

javier.lopez@nasdaqomx.com

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