More than likely, we are not to see big changes coming soon to copper or zinc prices  - maybe in a year or longer, IMO.

Having said that, "We have Cobalt".  While prices there too may have stabilized in recent weeks, demand is at the second highest levels in history, and is sure to accelerate upwards again "soon".

Also, and FWIW - http://www.mining.com/web/commodities-flashing-generation-buy-signal/

VP