Tesis central: the surplus that never arrived
The International Lead and Zinc Study Group projected a 271,000-tonne surplus for 2026 at its October 2025 meeting. By April 2026, those same data showed 2025 had been a 33,000-tonne deficit — and the 2026 forecast had been slashed by 290,000 tonnes to a 19,000-tonne shortfall (FACT: ILZSG, April 23, 2026 Press Release). That 290,000-tonne revision, in six months, is the single largest forecast swing in the zinc market since the Global Financial Crisis.
LME three-month zinc hit a near four-year high of $3,633.50 per tonne in the week ending May 15, up 13% since January (FACT: Reuters, Andy Home, May 20, 2026). Reuters' January analyst poll had produced a mean Q2 2026 forecast of just $3,041.50/t — the most bullish of 25 analysts pegged the market at $3,318/t. Reality has already blown through the highest consensus call by $315/t.
What follows is Rzzro's analysis of why the consensus is wrong, what is actually happening in each region, and what a buyer in any position should do about it.
Where consensus is wrong
The prevailing view, articulated by ILZSG through late 2025 and echoed by ING, Argus, and Sumitomo Metal Mining, was that zinc mine supply was recovering fast enough to replenish concentrate inventories and eventually oversupply the refined market. The consensus was remarkable in its uniformity: every major forecaster projected surpluses of 256,000–288,000 tonnes for 2026 (FACT: ING Think, Argus Metals, 2025).
Rzzro believes this consensus misses three things that are each individually material and collectively transformative.
First, the pace of Western smelter attrition has accelerated, not stabilized. The Kazzinc explosion on May 5 is the fourth major disruption in 18 months — following Toho Zinc's permanent closure of its Annaka smelter (120,000 tonnes), Nyrstar's Budel curtailment, and the Nexa Cajamarquilla fire on May 18. Between Kazzinc and Cajamarquilla alone, roughly 600,000 tonnes of annual Western smelting capacity is disrupted (FACT: Reuters, May 20, 2026). The ILZSG April forecasts were made before either of these two May incidents occurred.
Second, the consensus treated Chinese and Western supply as interchangeable. But China's 8-12% output surge is structurally domestic. The LME-SHFE arbitrage window is closed — Chinese metal cannot flow westward at current spreads. China's refined zinc imports slumped 57% year-on-year in the first quarter of 2026 after falling 33% in all of 2025 (FACT: Reuters, Andy Home, May 20, 2026; SMM data).
Third, the TC benchmark collapse is not cyclical; it is a structural signal. The annual zinc concentrate TC benchmark fell from $274/t (2023) to $165/t (2024) to $80/t (2025) — a 71% cumulative decline (FACT: Fastmarkets, Reuters; SMM). The 2026 benchmark remains unsettled in late May, with the China Zinc Smelter Purchase Team setting Q2 2026 TC guidance at just $35-70/t for imported concentrates — a $60/t drop from Q1 2026 guidance of $105-120/t (FACT: Fastmarkets, April 16, 2026). Spot market TCs for higher-grade concentrates have already been heard at zero and in negative territory.
Global market: two years ago vs. five years ago
Two years ago, in Q4 2024, LME zinc averaged approximately $2,950/t. The market narrative was dominated by expectations of a Chinese construction recovery and the gradual replenishment of post-pandemic concentrate inventories. Western smelters were operating at relatively high utilization rates, and the TC benchmark of $165/t — while compressed from $274/t — still offered positive margins for most operators (FACT: LME, Fastmarkets).
Five years ago, in 2021, the zinc market was emerging from pandemic-era demand destruction. LME prices averaged around $2,800/t, and the dominant narrative was one of ample concentrate supply and low treatment charges that were expected to recover as smelters competed for feedstock. China was still a net importer of refined zinc, absorbing roughly 400,000–500,000 tonnes per year from the rest of the world and providing an automatic balancing mechanism when Western supply tightened (FACT: LME, IMF IFS, ILZSG historical data).
The structural shift since 2021 has been profound. Western smelter capacity has shrunk by an estimated 400,000+ tonnes through closures and curtailments. Chinese smelter capacity has expanded by more than 600,000 tonnes. And critically, China no longer absorbs Western surplus — it is approaching self-sufficiency, having imported just 300,000 tonnes of refined zinc in 2025, down from over 500,000 tonnes in 2021 (FACT: ILZSG via Reuters, May 20, 2026; Citi analysts). In Q4 2025, China briefly became a net exporter of refined zinc when the LME squeeze opened a profitable arbitrage window.
The global balancing mechanism has broken. That is the single most important structural change from the 2021 zinc market to the 2026 zinc market.
Structural theme 1: The Western smelter that cannot catch a break
Glencore's Kazzinc complex in Ust-Kamenogorsk, Kazakhstan — 250,000–300,000 tonnes of annual zinc smelting capacity — suffered a fatal explosion on May 5, 2026, killing three workers and injuring five. The company confirmed on May 12 that its zinc and lead plants are operating at reduced capacity, with clean-up and investigation ongoing (FACT: Kitco/Reuters, May 12, 2026). No timeline for full restoration has been announced.
This follows a cascade that is not random but structurally driven. The TC collapse from $274/t to $80/t has made the Western smelter business model uneconomic at precisely the moment when energy costs in Europe and Australia remain elevated relative to pre-2022 levels. Toho Zinc permanently closed its Annaka smelter (120,000 tonnes) in Japan. Nyrstar's Budel smelter in the Netherlands remains curtailed with no restart expected given TTF natural gas prices that keep European smelting costs well above Asian benchmarks. Nexa Resources suspended operations at its Cajamarquilla plant in Peru on May 18 following a fire (FACT: Reuters, May 20, 2026).
Glencore's 2026 guidance for mined zinc output of 700,000–740,000 tonnes, down 25% from 969,400 tonnes in 2025, removes approximately 250,000 tonnes of concentrate from the pipeline (FACT: Glencore Q1 2026 Production Report, Fastmarkets). The primary driver is Antamina in Peru, where zinc grades are in terminal decline as the mine enters the final phase of its current mine plan. Mount Isa's MICO mine closed in mid-2025. McArthur River is operating near its permitted capacity ceiling (FACT: Glencore FY2025 production report).
The spiral feeds itself: lower mine output means tighter concentrate, which means lower TCs, which means less Western smelting capacity, which means less refined zinc supply. For a buyer, every tonne of Western smelter capacity that closes is a tonne that must be replaced by Chinese refined zinc at a higher logistics cost — or not replaced at all.
Structural theme 2: The TC collapse that breaks the business model
The annual zinc concentrate TC benchmark has fallen from $274/t (2023) to $165/t (2024) to $80/t (2025) — a 71% cumulative collapse in three years (FACT: Fastmarkets, LME Week 2025). The 2026 benchmark remains unsettled as of late May, with market participants discussing zero to negative numbers. The CZSPT — representing Chinese smelters — set its Q2 2026 TC purchasing guidance at just $35-70/t for imported concentrates, down sharply from $105-120/t in Q1 (FACT: Fastmarkets, April 16, 2026).
At $80/t, a typical Western smelter processing 100,000 tonnes of concentrate per year earns approximately $8 million in treatment revenue — barely enough to cover operating costs, let alone capital expenditure, environmental compliance, or energy. European smelters additionally face electricity costs that are 2-3x pre-2022 levels (FACT: European Commission energy data, Fastmarkets). The result is that every unplanned outage becomes a permanent closure risk because there is no economic incentive to restart.
In the spot market, the situation is already more extreme. Fastmarkets assessed zinc spot concentrate TC, cif China, at $0-30/t on March 13, 2026 (FACT: Fastmarkets, April 16, 2026). Some higher-grade concentrates with by-product content have traded at zero or negative levels. Chinese domestic TCs in northern China were assessed at 1,500-1,700 RMB/t ($217-246/t) and in southern China at 1,300-1,600 RMB/t ($188-231/t) — levels that support Chinese smelters but only because of by-product revenue from associated lead, silver, and other metals (FACT: Fastmarkets, February 27, 2026).
For a buyer, the TC collapse is a direct driver of Western smelter viability. Every month that the 2026 benchmark remains unsettled at or near zero, the probability of another Western smelter closure increases. The Chinese smelter model — dependent on by-product credits — is better positioned to survive, but even there, the slim margins leave no room for error.
Structural theme 3: The China divergence
China's refined zinc production increased by more than 600,000 tonnes in 2025, an 8-12% year-on-year surge driven by new plants including Jiyuan Wanyang and Xinjiang Huoshaoyun. In the first nine months of 2025 alone, output rose 12% year-on-year (FACT: SMM, Antaike, Reuters). ILZSG expects Chinese output to grow a further 3% in 2026, driven by continued capacity additions (FACT: ILZSG via Reuters, May 20, 2026).
But this metal is not available to the rest of the world at current spreads. Chinese social inventories of refined zinc remain above 250,000 tonnes, and SHFE zinc stocks have nearly doubled to 146,766 tonnes (FACT: SMM May Day 2026 review, Reuters). China's refined zinc imports collapsed 57% year-on-year in January-March 2026, following a 33% decline in 2025. The country briefly turned net exporter in Q4 2025 during the LME squeeze but outbound shipments have been minimal at 10,600 tonnes over Q1 2026 (FACT: Reuters, Andy Home, May 20, 2026).
Global refined zinc production grew only 1.7% year-on-year in 2025, and all of that growth was Chinese. Western metal production contracted due to closures, operational problems, and voluntary reductions driven by low treatment charges. The mismatch in processing performance has left the zinc landscape split between a well-supplied Chinese market and persistent tightness in the rest of the world (FACT: ILZSG via Reuters, May 20, 2026).
For a buyer, this is the most important structural fact about zinc in 2026: record Chinese output does not mean global supply is loose. It means the two markets have decoupled. The Western deficit is now structurally isolated from China's domestic surplus, and the traditional balancing mechanism — Chinese imports rising when Western supply tightens — no longer functions at current price spreads.