Semi-Annual Changes to the NASDAQ Biotechnology Index

* Reuters is not responsible for the content in this press release.

Mon May 16, 2011 7:02am EDT 

NEW YORK, May 16, 2011 (GLOBE NEWSWIRE) -- The NASDAQ OMX Group, Inc.
(Nasdaq:NDAQ) announced today the results of the semi-annual re-ranking of the
NASDAQ Biotechnology Index(R) (Nasdaq:NBI), which will become effective prior to
market open on Monday, May 23, 2011.

The following six securities will be added to the Index: Achillion
Pharmaceuticals, Inc. (Nasdaq:ACHN), AVEO Pharmaceuticals, Inc. (Nasdaq:AVEO),
Columbia Laboratories, Inc. (Nasdaq:CBRX), ISTA Pharmaceuticals, Inc.
(Nasdaq:ISTA), Pacific Biosciences of California, Inc. (Nasdaq:PACB) and Zalicus
Inc. (Nasdaq:ZLCS).

The Index is designed to track the performance of a set of NASDAQ listed
securities that are classified as either biotechnology or pharmaceutical
according to the Industry Classification Benchmark (ICB). The NASDAQ
Biotechnology Index is re-ranked semi-annually in May and November. For more
information about the NASDAQ Biotechnology Index, including detailed eligibility
criteria, visit https://indexes.nasdaqomx.com/.

As a result of the re-ranking, the following two securities will be removed from
the Index: Biodel Inc. (Nasdaq:BIOD) and China Sky One Medical, Inc.
(Nasdaq:CSKI).

The NASDAQ Biotechnology Index is the basis for the iShares Nasdaq Biotechnology
IndexSM Fund (Nasdaq:IBB), which seeks investment results that correspond
generally to the price and yield performance, before fees and expenses, of the
NASDAQ Biotechnology Index. In addition, options based on the NASDAQ
Biotechnology Index and the iShares Nasdaq Biotechnology Index Fund trade on
various exchanges.

About NASDAQ OMX Global Index Group

NASDAQ OMX Global Index Group is engaged in the design, development,
calculation, licensing, and marketing of NASDAQ OMX Indexes. NASDAQ OMX Global
Index Group specializes in the development of indexes focusing on NASDAQ OMX's
brand themes of innovation, technology, growth, and globalization. NASDAQ OMX
Global Index Group also provides custom index services and design solutions as a
third-party provider to selected financial organizations. For more information
about NASDAQ OMX indexes, visit www.nasdaq.com/indexes.

About NASDAQ OMX Group

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 more than 3,500 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. *Please follow NASDAQ OMX on
Facebook (http://www.facebook.com/pages/NASDAQ-OMX/108167527653) and Twitter
(http://www.twitter.com/nasdaqomx).

The ETFs set forth above are not issued, endorsed, sold, or promoted by NASDAQ
OMX.

NASDAQ OMX MAKES NO WARRANTIES AND BEARS NO LIABILITY WITH RESPECT TO THE ETFS.

The Industry Classification Benchmark ("ICB") is jointly owned by FTSE
International Limited ("FTSE") and Dow Jones & Company, Inc.

FTSE(TM) is a trademark of the London Stock Exchange Plc and The Financial Times
Limited and is used by FTSE International Limited under license.

"Dow Jones" and "DJ" are trademarks of Dow Jones & Company Inc.

The iShares Funds are distributed by SEI Investments Distribution Co. ("SEI").
BlackRock Fund Advisors ("BFA") serves as the investment advisor to the Funds.
BFA is a subsidiary of BlackRock Institutional Trust Company, N.A., neither of
which is affiliated with SEI. For a prospectus, call 1-800-iSHARES
(1-800-474-2737), or by viewing or downloading a prospectus at
http://www.ishares.com.

IShares are not FDIC Insured.

Have No Bank Guarantee.

May Lose Value.

NDAQG


CONTACT: NASDAQ Media Contact:
         Wayne Lee
         +1.301.978.4875
         Wayne.D.Lee@NASDAQOMX.Com

         NASDAQ Issuer and Investor Contact:
         Lisa Chaney
         +1.301.978.8281
         Lisa.Chaney@NASDAQOMX.Com
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