NEW YORK, March 24, 2011 /PRNewswire/ -- S&P will make the following changes to the S&P 500, S&P MidCap 400, and S&P SmallCap 600 Indices:

    --  Huntington Ingalls Industries Inc. (NYSE: HIIwi) will replace Dynegy
        Inc. (NYSE: DYN) in the S&P MidCap 400 index after the close of trading
        on Wednesday, March 30. S&P 500 constituent Northrop Grumman Corp.
        (NYSE: NOC) is spinning off Huntington Ingalls Industries to its
        shareholders in a transaction expected to be completed after the market
        close on or about that date. The Northrop Grumman stub will remain in
        the S&P 500 index following the spin-off. Dynegy's market capitalization
        has fallen below $735 million, and is no longer representative of the
        mid-cap space.


    --  S&P MidCap 400 constituent Edwards Lifesciences Corp. (NYSE: EW) will
        replace Qwest Communications International Inc. (NYSE: Q) in the S&P 500
        index, S&P SmallCap 600 constituent The Cooper Companies Inc. (NYSE:
        COO) will replace Edwards Lifesciences in the S&P MidCap 400 index, and
        Koppers Holdings Inc. (NYSE: KOP) will replace The Cooper Companies in
        the S&P SmallCap 600 index after the close of trading on Thursday, March
        31. Qwest Communications International is being acquired by S&P 500
        constituent CenturyLink Inc. (NYSE: CTL) in a deal expected to be
        completed on or about that date, pending final approvals.

Standard & Poor's will monitor these transactions and post any relevant updates on its website: www.standardandpoors.com.

Huntington Ingalls Industries designs, constructs, repairs and maintains nuclear-powered and non-nuclear powered ships. Headquartered in Newport News, VA, the company will be added to the S&P MidCap 400 GICS (Global Industry Classification Standard) Aerospace & Defense Sub-Industry index.

Edwards Lifesciences provides products and technologies designed to treat advanced cardiovascular diseases. Headquartered in Irvine, CA, the company will be added to the S&P 500 GICS Health Care Equipment Sub-Industry index.

The Cooper Companies develops, manufactures, and markets healthcare products. Headquartered in Pleasanton, CA, the company will be added to the S&P MidCap 400 GICS Health Care Supplies Sub-Industry index.

Koppers Holdings provides carbon compounds and commercial wood treatment products. Headquartered in Pittsburgh, PA, the company will be added to the S&P SmallCap 600 GICS Commodity Chemicals Sub-Industry index.

Following is a summary of the changes:





          S&P  MIDCAP 400 INDEX  - March 30, 2011
                            GICS ECONOMIC      GICS SUB-
                COMPANY         SECTOR         INDUSTRY
              Huntington
                Ingalls                      Aerospace &
     ADDED    Industries     Industrials        Defense
     -----    ----------     -----------      -----------
                Independent
                    Power
                Producers &
                   Energy
    DELETED     Dynegy        Utilities         Traders
    -------     ------        ---------       -----------






          S&P  500 INDEX  - March 31, 2011
                                  GICS ECONOMIC           GICS SUB-
                 COMPANY              SECTOR               INDUSTRY
                  Edwards                                Health Care
     ADDED      Lifesciences       Health Care            Equipment
     -----     -------------       -----------          ------------
                   Qwest                                 Integrated
              Communications    Telecommunication    Telecommunication
    DELETED    International         Services              Services
    -------   ---------------   ------------------   ------------------






    S&P  MIDCAP 400 INDEX  - March 31, 2011
                             GICS ECONOMIC     GICS SUB-
                COMPANY          SECTOR         INDUSTRY
                   The
                 Cooper                       Health Care
     ADDED      Companies     Health Care       Supplies
     -----     ----------     -----------    ------------
                 Edwards                      Health Care
    DELETED   Lifesciences    Health Care      Equipment
    -------   ------------    -----------     -----------






    S&P  SMALLCAP 600 INDEX  - March 31, 2011
                          GICS ECONOMIC     GICS SUB-
              COMPANY         SECTOR         INDUSTRY
               Koppers                      Commodity
     ADDED    Holdings      Materials       Chemicals
     -----    --------      ---------      ----------
                 The
               Cooper                      Health Care
    DELETED   Companies    Health Care       Supplies
    -------   ---------    -----------     -----------

For more information about S&P Indices, please visit www.standardandpoors.com/indices.

About S&P Indices

S&P Indices, the world's leading index provider, maintains a wide variety of investable and benchmark indices to meet an array of investor needs. Over $1.25 trillion is directly indexed to Standard & Poor's family of indices, which includes the S&P 500, the world's most followed stock market index, the S&P/Case-Shiller Home Price Indices, the leading measure of U.S. home prices, the S&P Global BMI, an index with approximately 11,000 constituents, the S&P GSCI, the industry's most closely watched commodities index, and the S&P National AMT-Free Municipal Bond Index, the premier investable index for U.S. municipal bonds. For more information, please visit www.standardandpoors.com/indices.

For more information contact:

David M. Blitzer, Ph.D.Managing Director & Chairman of the Index Committee(212) 438-3907

SOURCE Standard & Poor's