NEW YORK, May 22, 2013 /PRNewswire/ -- S&P Dow Jones Indices will make the following changes to the S&P MidCap 400 and SmallCap 600 indices:

• Domino's Pizza Inc. (NYSE: DPZ) will replace Plains Exploration & Production Co. (NYSE: PXP) in the S&P MidCap 400 after the close of trading on Thursday, May 30. S&P 100 & 500 constituent Freeport-McMoRan Copper & Gold Inc. (NYSE: FCX) is acquiring Plains Exploration & Production in a deal expected to be completed on or about that date.
• Cynosure Inc. (NASD: CYNO) will replace NCI Building Systems Inc. (NYSE: NCS) in the S&P SmallCap 600 after the close of trading on Friday, May 31. NCI Building Systems announced the conversion of some preferred stock which will leave the company's public float substantially below the 50% threshold needed for continued inclusion in the index.

Domino's Pizza operates as a pizza delivery company. Headquartered in Ann Arbor, MI, the company will be added to the S&P MidCap 400 GICS (Global Industry Classification Standard) Restaurants Sub-Industry index.

Cynosure develops, manufactures, and markets aesthetic treatment systems. Headquartered in Westford, MA, the company will be added to the S&P SmallCap 600 GICS Health Care Equipment Sub-Industry index.

Following is a summary of the changes:

Additions to and deletions from S&P  Dow Jones Indices do not in any way reflect an opinion on the investment merits of the companies involved.

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For more information:

Dave Guarino
Communications
S&P Dow Jones Indices
dave_guarino@spdji.com
(201) 755-5334

David Blitzer
Managing Director and Chairman of the Index Committee
S&P Dow Jones Indices
david_blitzer@ spdji.com
(917) 376-1204

SOURCE S&P Dow Jones Indices