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Cliffs Natural Resources (CLF) short duration calls swept up

December 20, 2016 11:11 AM EST

Cliffs Natural Resources (NYSE: CLF) December weekly 9 and 10 calls are active on total call volume of 19K contracts (5K puts). December weekly call option implied volatility is at 77, January is at 67; compared to its 52-week range of 33 to 79.



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