Zinc Holds $3,580 as Negative Treatment Charges Force Smelter Production Cuts

Zinc's price action in July tells only half the story. At $3,583/t, LME zinc is up roughly 13% year-to-date and holding near three-year highs. But the more important signal is in the concentrates market, where treatment charges have collapsed to levels that make smelting uneconomic for all but the most cost-efficient operators. Chinese spot TCs for imported zinc concentrate hit -$71.20/dmt in mid-2026, according to SMM, meaning smelters are effectively paying mines to supply them with feed. Domestic Chinese TCs are at -50 yuan per tonne of metal content — also a record low. The 2026 annual benchmark TC between Teck Resources and Korea Zinc settled at just $85/dmt, a modest increase from 2025's $80/dmt but still a multi-decade low that guarantees negative margins for high-cost smelters.

The smelter response is now materializing. Bloomberg reported in late June that Chinese zinc smelters have begun implementing production cuts after months of margin erosion. Fastmarkets confirmed that spot domestic TCs in South China collapsed from 900–1,100 yuan/t in late April to -100 to +100 yuan/t by May 29 — a wipeout. 'Processing fees have dropped to historic lows,' Fastmarkets noted. 'Smelters are considering or implementing production cuts.' The cuts are expected to deepen through July and August as summer maintenance season provides cover for extended shutdowns.

The root of the concentrate squeeze is a mismatch between recovering mine supply and insufficient smelter capacity outside China. Global zinc mine production surged 4.8% in 2025 after three years of contraction, according to ILZSG data, driven by ramp-ups in Brazil, Canada, Norway, and China. SMM estimates an additional 300,000 tonnes of zinc-in-concentrate will come to market in 2026. But the new mine supply is arriving at ports in China, not at smelters in Europe or North America, where capacity remains constrained by energy costs and structural underinvestment. The result is a bifurcated market: Chinese smelters are oversupplied with domestic and imported concentrate but cannot process it profitably at current TCs, while Western smelters cannot get enough feed to run at capacity.

LME inventory levels amplify the tightness narrative. On-warrant LME zinc stocks fell to roughly 24,850 tonnes in late October 2025 — barely enough to cover one day of global zinc consumption. They have since recovered to approximately 100,000–120,000 tonnes, but this remains low by historical standards. For context, LME zinc stocks averaged above 300,000 tonnes in April 2021. The current stock level represents roughly 2-3 days of global consumption, and with canceled warrants running at 12% of total inventory, the metal available for delivery is even tighter. Backwardation has emerged intermittently on the LME zinc curve, another signal that nearby metal is scarce.

The ILZSG's revised forecast crystallizes the shift in market thinking. As recently as October 2025, the group projected a 271,000-tonne refined zinc surplus for 2026 — a comfortably oversupplied market. By April 2026, that had been revised to a small 19,000-tonne deficit. The revision reflects the smelter bottleneck: mine output is growing, but refined output is not keeping pace because smelters are either shutting (China) or unable to secure concentrate (ex-Western markets). Reuters columnist Andy Home captured the dynamic in May: 'Zinc is trading at three-year highs despite surplus forecasts, because the surplus metal is trapped in China while the Western market is tight.'

Analyst price views diverge sharply between near-term tightness and medium-term surplus expectations. Fastmarkets expects prices to soften in H2 2026 as new mine supply eventually pushes through the smelter bottleneck and refined output catches up. Morgan Stanley's 2026 average forecast of $2,900/t implies a sharp pullback from current levels. StoneX sees a similar trajectory, with TCs eventually recovering toward $160/dmt. But for buyers who need metal in Q3 2026, medium-term forecasts are irrelevant. The physical market is tight now, and smelter cuts are tightening it further.

By-product credits are keeping some smelters alive. Zinc smelting produces sulfuric acid, silver, gold, and copper as by-products, and elevated prices for these co-products — particularly silver above $45/oz and sulfuric acid in short supply due to Gulf disruptions — are offsetting some of the TC margin pressure. Teck Resources' Trail smelter in Canada, one of the world's largest, relies heavily on by-product revenues. But smaller, less diversified smelters without meaningful by-product streams are at acute risk of closure. The shakeout in Chinese smelting capacity may prove structural rather than cyclical.

Zinc's price path for the remainder of 2026 depends on two variables: the pace of Chinese smelter cuts, and the speed with which new mine supply translates into refined metal. If smelter cuts accelerate in July-August, refined zinc could become genuinely scarce in Western markets, pushing LME above $3,800/t. If mine supply arrives faster than expected and TCs recover, the market could ease toward $3,000/t. The concentrate market says the first scenario is more likely. The futures curve says the second. One of them is wrong.