Commodity traders cashed in their winnings last week after a stellar run across metal markets, but strategists believe that has created an opportunity for investors to “buy the dip” that will reignite the rally.

Copper endured its biggest weekly loss in more than three months, after surging to a record above $US11,000 a tonne, while gold suffered its largest weekly decline this year after hitting a peak of $US2450 an ounce. Silver also experienced a sharp reversal from an 11-year-high.