CLEVELAND--(BUSINESS WIRE)--Cliffs Natural Resources Inc. (NYSE: CLF) (Paris: CLF) announced today that Standard & Poor’s has issued a press release stating that it will add Cliffs to the S&P 500 Index. Cliffs’ shares will be added to the Index effective Dec. 18, 2009, after the market closes. The S&P 500 Index is the world’s most followed stock market index and serves as a benchmark for the U.S. equity market as a whole, as well as for individual industry groups an
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