NEW YORK, March 25 /PRNewswire/ -- Standard & Poor's will make the following changes to the S&P 500, S&P MidCap 400 and S&P SmallCap 600 indices after the close of trading on Wednesday, April 1:

    --  S&P MidCap 400 constituent Denbury Resources Inc. (NYSE: DNR) will
        replace Rohm and Haas Co. (NYSE: ROH) in the S&P 500, and Corporate
        Office Properties Trust (NYSE: OFC) will replace Denbury Resources in
        the S&P MidCap 400.  S&P 100 & 500 constituent The Dow
        Chemical Corp. (NYSE: DOW) is acquiring Rohm and Hass in a transaction
        expected to be completed on or about that date.



    --  S&P SmallCap 600 constituent Cleco Corp. (NYSE: CNL) will replace
        Belo Corp. (NYSE: BLC) in the S&P MidCap 400, and Pinnacle Financial
        Partners Inc. (Nasdaq: PNFP) will replace Cleco in the S&P SmallCap
        600. As of today's close of trading Belo had a market
        capitalization of $81 million, ranking it 400th in the index.

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

Denbury Resources is engaged in the acquisition, development, operation and exploration of oil and natural gas properties. Headquartered in Plano, TX, the company will be added to the S&P 500 GICS (Global Industry Classification Standard) Oil & Gas Exploration & Production Sub-Industry index.

Corporate Office Properties is a specialty office real estate investment trust (REIT). Headquartered in Columbia, MD, the company will be added to the S&P MidCap 400 GICS Office REITs Sub-Industry index.

Cleco is a public utility company. Headquartered in Pineville, LA, the company will be added to the S&P MidCap 400 GICS Electric Utilities Sub-Industry index.

Pinnacle Financial operates as a community bank primarily in urban markets. Headquartered in Nashville, TN, the company will be added to the S&P SmallCap 600 GICS Regional Banks Sub-Industry index.

Following is a summary of the changes:


                          S&P 500 INDEX  -  April 1, 2009
               COMPANY     GICS ECONOMIC SECTOR         GICS SUB-INDUSTRY

    ADDED      Denbury           Energy               Oil & Gas Exploration &
               Resources                                    Production
    DELETED   Rohm and          Materials              Diversified Chemicals
                Haas



                        S&P MIDCAP 400 INDEX - April 1, 2009
               COMPANY        GICS ECONOMIC SECTOR      GICS SUB-INDUSTRY

    ADDED     Corporate          Financials                Office REITs
               Office
              Properties
                Cleco            Utilities              Electric Utilities
    DELETED   Denbury              Energy             Oil & Gas Exploration &
              Resources                                    Production
              Belo Corp.    Consumer Discretionary        Broadcasting



                      S&P SMALLCAP 600 INDEX - April 1, 2009
               COMPANY    GICS ECONOMIC SECTOR          GICS SUB-INDUSTRY

    ADDED     Pinnacle        Financials                Regional Banks
              Financial
    DELETED   Cleco           Utilities                 Electric Utilities

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 www.standardandpoors.com/indices.

About Standard & Poor's

Standard & Poor's, a subsidiary of The McGraw-Hill Companies (NYSE: MHP), is the world's foremost provider of independent credit ratings, indices, risk evaluation, investment research and data. With approximately 10,000 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.

SOURCE Standard & Poor's