Tight inventories, negative treatment charges and spillover buying from copper kept zinc near elevated levels even after profit-taking trimmed gains on August 3.
Zinc futures on the London Metal Exchange climbed to their highest level in roughly four years on August 3, briefly reaching $3,703.50 per metric ton before easing to close at $3,641.00, down $2.00 or 0.05% on the day. The move extended a broader upswing that has left zinc higher for four straight months through July. The rally has been driven by two linked forces: tightening supply signals and strength across the wider base-metals market. Declining global inventories have reinforced concerns that supply-demand conditions are tightening, while treatment charges (fees paid to smelters to process concentrate into refined metal) have fallen into negative territory, reducing incentives for smelters to raise output. Copper, which remained elevated at $13,870 per metric ton, has also drawn capital into zinc and aluminum as investors look across the industrial metals complex. Zinc is used mainly for galvanizing (coating steel to prevent corrosion), so demand is closely tied to economic activity. Market participants largely expect supply tightness to persist as major global mines face declining ore grades and operational suspensions, while demand in China remains important because infrastructure investment and automobile production continue to support consumption. At the same time, higher zinc prices are raising concern about demand destruction as rising costs for galvanized steel pressure margins in construction and manufacturing. With LME inventories still low, near-term direction is likely to hinge on how the supply-demand balance evolves.