Cliffs Natural Resources Inc. (CLF) shares continue to set new highs as analysts and management raise estimates. Company Description Cliffs Natural Resources mines iron and metallurgical coal in the U.S., South America, and Australia. The company focuses on supplying growing markets. Improving Outlook When Cliffs reported third-quarter results on Oct 29 it included comments on improving business conditions and [...] (CLF) Cliffs Natural Resources – 2010 Growth Forecasted to be 329%