NEW YORK, July 17, 2015 /PRNewswire/ -- S&P SmallCap 600 constituent NetScout Systems Inc. (NASD: NTCT) will replace Tidewater Inc. (NYSE: TDW) in the S&P MidCap 400, and Tidewater will replace NetScout Systems in the S&P SmallCap 600 after the close of trading on Friday, July 24. NetScout Systems recently completed the acquisition of S&P 500 constituent Danaher Corp.'s (NYSE: DHR) communications business making NetScout Systems' post transaction market capitalization more representative of the mid-cap market space. Tidewater has a market capitalization more representative of the small-cap market space.

NetScout Systems designs, develops, manufactures, markets, licenses, sells, and supports network, application, and service assurance solutions.  Headquartered in Westford, MA , the company will be added to the S&P MidCap 400 GICS (Global Industry Classification Standard) Communications Equipment Sub-Industry index.

Tidewater provides offshore service vessels and marine support services. Headquartered in New Orleans, LA, the company will be added to the S&P SmallCap 600 GICS Oil & Gas Equipment & Services 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.

About S&P Dow Jones Indices

S&P Dow Jones Indices LLC, a part of McGraw Hill Financial, is the world's largest, global resource for index-based concepts, data and research. Home to iconic financial market indicators, such as the S&P 500® and the Dow Jones Industrial Average®, S&P Dow Jones Indices LLC has over 115 years of experience constructing innovative and transparent solutions that fulfill the needs of investors. More assets are invested in products based upon our indices than any other provider in the world. With over 1,000,000 indices covering a wide range of asset classes across the globe, S&P Dow Jones Indices LLC defines the way investors measure and trade the markets. To learn more about our company, please visit www.spdji.com.

S&P® is a registered trademark of Standard & Poor's Financial Services LLC ("S&P"), a part of McGraw Hill Financial. Dow Jones® is a registered trademark of Dow Jones Trademark Holdings LLC ("Dow Jones").  These trademarks have been licensed to S&P Dow Jones Indices LLC. It is not possible to invest directly in an index. S&P Dow Jones Indices LLC, Dow Jones, S&P and their respective affiliates (collectively "S&P Dow Jones Indices") do not sponsor, endorse, sell, or promote any investment fund or other investment vehicle that is offered by third parties and that seeks to provide an investment return based on the performance of any index. This document does not constitute an offer of services in jurisdictions where S&P Dow Jones Indices does not have the necessary licenses. S&P Dow Jones Indices receives compensation in connection with licensing its indices to third parties.

For more information:

David Blitzer
Managing Director and Chairman of the Index Committee
S&P Dow Jones Indices
(+1) 212 438 3907
david.blitzer@spdji.com 

David R. Guarino
Communications
S&P Dow Jones Indices
(+1) 212 438 1471
dave.guarino@spdji.com

SOURCE S&P Dow Jones Indices