Standard & Poor's Announces Change to U.S. Index

NEW YORK, Sept. 14, 2011 /PRNewswire/ -- American Campus Communities Inc. (NYSE:ACC) will replace The Lubrizol Corp. (NYSE:LZ) in the S&P MidCap 400 index after the close of trading on Friday, September 16, 2011. Lubrizol is being acquired by S&P 100 & 500 constituent Berkshire Hathaway, Inc. (NYSE:BRK/B) in a deal expected to be completed on or about that date pending final approvals.

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

American Campus Communities, a real estate investment trust (REIT), engages in the acquisition, design, finance, development, lease, and management of student housing properties. Headquartered in Austin, TX, the company will be added to the S&P MidCap 400 GICS (Global Industry Classification Standard) Residential REITs Sub-Industry index.

Following is a summary of the change:

S&P MIDCAP 400 INDEX  – September 16, 2011
	COMPANY	GICS ECONOMIC SECTOR	GICS SUB-INDUSTRY
ADDED	American Campus Communities	Financials	Residential REITs
DELETED	Lubrizol	Materials	Specialty Chemicals

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

[phone]

SOURCE Standard & Poor's

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