Polysilicon used to be Big in the Supply Constrained Days of 2007 and 2008.This commodity which is generally producers for $30/kg used to be sold at $400/kg by Polysilicon Producers as the Exponential Demand Growth in the Crystalline Silicon Solar Cell Industry pushed the prices to astronomical levels.With Polysilicon being the only constraining link in the Supply Chain,Downstream Solar Companies with access to Cheap Polysilicon Contracts used to be the Kings of the Industry.Polysilicon Producers like MEMC,Wacker etc. managed to sign many sweetheart deals on those days with 10-15% prepayments and other favorable conditions loaded in the favor of the upstream suppliers.