An article from the AFR, for members or take a free trial:
http://www.afr.com/p/business/companies/miners_forced_to_cut_prices_S27NafLaaOkSeDrTP3S6RP
It says if China destocks as it did in 2011, it could take 6 weeks for a rebound in prices. Or, if it is the same credit conditions as in 2009, it could be terrible prices for 5 months.