Cliffs Natural Resources up on $200m buyback plan

[caption id="attachment_797045" align="aligncenter" width="600"] Cliffs Northshore MIne | Copyright © 2011 Cliffs Natural Resources Inc.[/caption] Cliffs Natural Resources (NYSE:CLF), the US biggest iron ore miner, was gaining almost 1.27% to $16.01 Monday noon ET after announcing plans for a $200...