Copper hits one-month peak on strong China factory data and weak dollar

A worker transfers newly made copper slugs, to be pressed into bullets, at Barnes Bullets in Mona, Utah, in this January 6, 2016 file photo. Traders have been raising their bets on an even steeper decline in copper prices in the coming months, worried that Chinese demand is dwindling just as investment made when markets were booming unleashes a new wave of supply. REUTERS/George Frey/Files