Standard & Poor's Announces Changes to U.S. Indices

NEW YORK, Oct. 28  /PRNewswire/ -- S&P MidCap 400 constituent Wisconsin Energy Corp. (NYSE:WEC) will replace MGIC Investment Corp. (NYSE:MTG) in the S&P 500, S&P SmallCap 600 constituent Unit Corp. (NYSE:UNT) will replace Wisconsin Energy in the S&P MidCap 400, and Cal-Maine Foods Inc. (NASDAQ: CALM) will replace Unit in the S&P SmallCap 600, all after the close of trading on Thursday, October 30. As of today's close, MGIC Investment had a market capitalization of approximately $266 million, ranking it 500th in the index.

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

Wisconsin Energy provides electric and natural gas services. Headquartered in Milwaukee, WI, the company will be added to the S&P 500 GICS (Global Industry Classification Standard) Multi-Utilities Sub-Industry index.

Unit operates as a contract drilling company. Headquartered in Tulsa, OK, the company will be added to the S&P MidCap 400 GICS Oil & Gas Drilling Sub-Industry index.

Cal-Maine Foods engages in the production, grading, packaging, marketing, and distribution of shell eggs. Headquartered in Jackson, MS, the company will be added to the S&P SmallCap 600 GICS Packaged Foods & Meats Sub-Industry index.

  Following is a summary of the changes:



                         S&P 500 INDEX   - October 30, 2008

                   COMPANY       GICS ECONOMIC SECTOR   GICS SUB-INDUSTRY
  ADDED         Wisconsin Energy    Utilities          Multi-Utilities
  DELETED       MGIC Investment     Financials         Thrifts & Mortgage
                                                            Finance



                    S&P MIDCAP 400 INDEX   - October 30, 2008

                   COMPANY       GICS ECONOMIC SECTOR   GICS SUB-INDUSTRY
  ADDED         Unit                Energy             Oil & Gas Drilling
  DELETED       Wisconsin Energy    Utilities          Multi-Utilities



                   S&P SMALLCAP 600 INDEX   - October 30, 2008

                   COMPANY       GICS ECONOMIC SECTOR    GICS SUB-INDUSTRY
  ADDED         Cal-Maine Foods     Consumer Staples    Packaged Foods
                                                            & Meats
  DELETED       Unit                Energy              Oil & Gas Drilling





Additions to and deletions from an S&P equity index do not in any way reflect an opinion on the investment merits of the companies concerned.

About Standard & Poor's Index Services

Standard & Poor's Index Services, the world's leading index provider, maintains a wide variety of investable and benchmark indices to meet an array of investor needs. Its family of indices includes the S&P 500, an index with $1.5 trillion invested and $4.85 trillion benchmarked, and the S&P Global 1200, a composite index comprised of seven regional and country headline indices. For more information, please visit http://www.standardandpoors.com/indices.

About Standard & Poor's

Standard & Poor's, a division of The McGraw-Hill Companies (NYSE:MHP), is the world's foremost provider of financial market intelligence, including independent credit ratings, indices, risk evaluation, investment research and data. With approximately 8,500 employees, including wholly owned affiliates, located in 23 countries and markets, Standard & Poor's is an essential part of the world's financial infrastructure and has played a leading role for more than 140 years in providing investors with the independent benchmarks they need to feel more confident about their investment and financial decisions. For more information, visit http://www.standardandpoors.com/. 

DATASOURCE: Standard & Poor's



CONTACT:  David M. Blitzer, Ph.D., Managing Director & Chairman of the

Index Committee, [phone]



Web Site:  http://www.standardandpoors.com/

http://www.standardandpoors.com/indices 

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