RIO Rio2 Limited New

TORONTO, Feb. 22, 2012 /CNW/ - Standard & Poor's will make the following changes in the S&P/TSX Canadian Indices: The Toronto Stock Exchange announced today in the Daily Bulletin that the shares of Rio Alto Mining Limited (TSXVN: RIO) will graduate to trade on TSX at the open of trading on Friday, February 24, 2012. The ticker symbol will remain "RIO" and the CUSIP number will remain 76689T 10 4. The company will be removed from the S&P/TSX Venture Composite Index after the close of trading on Thursday, February 23, 2011. Rio Alto Mining is also a constituent of the S&P/TSX Venture Select Index. The company will be removed from this index effective after the close of Thursday, March 1, 2012, at which time it will be listed on TSX. The company is also a constituent of the S&P/TSX Venture 30 Index. According to methodology, it will remain in this index while trading on TSX until the next semi-annual review of the index in August, 2012. Company additions to and deletions from an S&P equity index do not in any way reflect an opinion on the investment merits of the company. About S&P Indices S&P Indices, a leading brand of the McGraw-Hill Companies , maintains a wide variety of investable and benchmark indices to meet an array of investor needs. Over $1.45 trillion is directly indexed to our 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. It is not possible to invest directly in an index. S&P Indices does not sponsor, endorse, sell, or promote any S&P index-based investment product. This document does not constitute an offer of services in jurisdictions where S&P Indices or its affiliates do not have the necessary licenses. S&P Indices receives compensation in connection with licensing its indices to third parties. Standard & Poor's Canadian Index Operations CONTACT: Tony North(416) 507-3204sp_index@standardandpoors.comDave Guarino1 212 438 1471Dave_guarino@standardandpoors.com

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