DURING the commodity "supercycle" prices largely marched up and down in unison, fuelled by the strength (or weak-ness) of demand in China. Since last year commodities have again been on a tear, but for more idiosyncratic reasons. In the case of copper, strikes and supply disruptions in two of the world's largest mines have helped push prices this week to their highest level in 20 months. This fits into a narrative of longer-term potential supply shortages that has investors licking their lips over prospects for the red metal.
展开▼
