COLUMN-Copper market focus shifts back to unpredictable supply: Andy Home By: Reuters: Company News January 20, 2017 at 05:58 AM EST LONDON, Jan 20 (Reuters) - Last year it was the strength of demand that caught the copper market by surprise. Read More >> Related Stocks: Freeport-McMoRan Rio Tinto Plc ADR Teck Cominco Limited