Copper prices are on the rise due to supply issues, primarily stemming from a production stoppage at the Grasberg mine in Indonesia, one of the world’s largest copper producers.That scenario should tighten supply for copper at a time when the reddish-brown metal is in massive demand, driving its price even higher. Depending on which analyst you track, copper should rise to somewhere between $10,500-$11,700 per ton, up from $10,300 per ton as of September 25.Demand for copper is already high, especially from ...