Anglo American (LSE: AAL) closes 3.9% higher as copper hits record on China acid ban

Anglo American (LSE: AAL) shares closed Monday’s London session 3.92% higher at GBX 4,000.00, leading a broad-based rally across the FTSE 100 mining complex as copper futures climbed 3.08% to USD 6.44 per pound on the back of a confirmed Chinese sulphuric acid export halt and a Chinese manufacturing PMI reading at a five-year high. Antofagasta closed 3.71% higher, Fresnillo gained 3.53%, Endeavour Mining rose 3.34%, Metlen Energy & Metals added 3.25%, and Rio Tinto closed 2.89% higher. The synchronised move tells investors that the copper revaluation is now being priced through the entire London-listed diversified miners cohort, not just the pure-play producers.

Why did Anglo American shares close 3.92% higher on the London Stock Exchange on 11 May 2026?

The catalyst was copper, and the copper move had two distinct drivers running in parallel. The first was the confirmed Chinese halt on sulphuric acid exports, effective from May 2026, covering acid produced as a byproduct of copper and zinc smelting. Argus Media and Bloomberg confirmed the policy on 9-10 April 2026. The policy removes one of the last flexible supply valves for the global mining industry, with Chile, the world’s largest copper producer, most exposed.

Chile imports more than one million tonnes of Chinese sulphuric acid annually, accounting for around 37% of its total acid demand. Roughly one-fifth of Chilean copper output relies on hydrometallurgical leaching, which depends directly on sulphuric acid availability. Sulphuric acid prices in Chile have already risen 44% in a single month, and producers including Anglo American operate the Los Bronces and Collahuasi mines inside that footprint. Tighter input costs at the production layer translate directly into a tighter refined copper market, which is what the futures market repriced on 11 May.

The second driver was Chinese demand. Manufacturing PMI in China rose to its highest level in more than five years, supporting the demand stack alongside the supply squeeze. With copper closing at USD 6.44 per pound, the metal is now within touching distance of the all-time intraday high set on 29 January 2026, when LME copper briefly traded at USD 13,387.50 per tonne. The combination of structural supply tightening and accelerating Chinese industrial demand is the cleanest bullish setup the copper market has produced since the post-pandemic recovery cycle.

What does the China sulphuric acid export ban mean for Anglo American’s Los Bronces and Collahuasi production?

The acid availability question is operationally specific for Anglo American. Los Bronces and Collahuasi, both located in Chile, are the company’s two largest copper-producing assets. Anglo American’s copper production fell 10% in 2025 to 695,000 tonnes, hitting the lower end of guidance, and the company has already cut its 2026 copper forecast to a range of 700,000 to 760,000 tonnes. That guidance was set before the full operational impact of the sulphuric acid supply squeeze became clear.

The fourth quarter of 2025 already showed copper output at Anglo American fell 14% year on year to 169,500 tonnes, down from 198,000 tonnes in Q4 2024. The decline was driven by lower ore grades at Quellaveco and Collahuasi, but the upstream supply chain pressure on acid availability sits on top of those grade challenges. Hydrometallurgical operations at Los Bronces, which Anglo American temporarily restarted in early 2026 to capture higher copper prices, are the most acid-intensive part of the production stack and therefore the most exposed to the Chinese export halt.

The market reaction on Monday was not a downgrade of Anglo American’s production outlook. It was a revaluation of the copper price environment in which that production gets sold. The arithmetic of a roughly 10% rise in copper prices typically translates to a 20% to 30% swing in mining company earnings because of the operating leverage embedded in fixed cost structures. The 3.92% share price move reflects the market beginning to price in a higher realised copper price for FY26 and FY27, partially offset by the higher input cost burden.

How does the Anglo American Teck Resources merger position the combined entity for the copper supercycle?

The merger of equals between Anglo American and Teck Resources, announced in September 2025, sits at the centre of the equity story. Shareholders of both companies voted overwhelmingly in favour on 9 December 2025. The Government of Canada granted approval under the Investment Canada Act on 15 December 2025. The remaining regulatory hurdles span multiple jurisdictions, with European Union competition signalling no major concerns and the Chinese MOFCOM review the principal outstanding piece.

The combined entity, Anglo Teck, will be headquartered in Canada and is positioned as a top-five global copper producer with more than 70% portfolio exposure to copper by revenue. The merger document outlines approximately USD 800 million in pre-tax synergies on a run-rate basis, with around 80% expected to be realised within two years of completion. Beyond synergies, the deal targets an additional USD 1.4 billion of annual average EBITDA uplift between 2030 and 2049 from optimising the adjacent Collahuasi and Quebrada Blanca copper assets in Chile, which sit on contiguous geology.

For retail investors, the strategic logic of the Anglo Teck combination becomes more valuable, not less, in the current copper environment. Two separate companies coordinating production decisions across neighbouring deposits is operationally inefficient. A combined entity with full optionality on production sequencing, processing capacity allocation and tailings management captures meaningfully more value at the current copper price than two standalone groups would. Yesterday’s share price move partly reflects that re-rating logic, layered onto the underlying commodity move.

How does the Strait of Hormuz conflict feed into copper supply through the sulphur transmission chain?

The link between the Iran war and copper prices is not obvious without tracing the chemistry chain. The Strait of Hormuz region accounts for roughly one-third of global sulphur output, which is the primary feedstock for sulphuric acid production. Sulphur prices have risen approximately 70% since the Strait of Hormuz disruption began in late March 2026. The export halt China announced for May 2026 is partly a domestic supply protection measure to ensure fertilizer producers retain access to acid for the spring planting cycle.

That transmission chain – Hormuz sulphur disruption to global acid shortage to Chinese export protection to Chilean copper output constraint to LME copper price spike – is the cleanest single piece of analytical evidence that the Iran conflict is reshaping the industrial metals complex in non-obvious ways. Anglo American is one of the most exposed FTSE 100 names to that transmission chain because of its Chilean copper concentration and the timing of its production ramp following Los Bronces’ partial restart.

The market repriced the chain on Monday in a way that should sustain even if the Iran conflict moves toward a near-term resolution. The Chinese acid export halt is policy-driven and can run through to the end of 2026 regardless of how Hormuz reopens. The structural supply tightness is now embedded in the chemistry layer rather than the energy layer, which is harder to unwind through diplomatic action.

What are the key risks for Anglo American shareholders as the copper price rally extends?

Three risks dominate the outlook from here. The first is execution on the Teck merger timeline. The deal completion is expected between late 2026 and early 2027, with the Chinese MOFCOM review the principal unresolved approval. Any delay beyond mid-2027 would push back the synergy realisation timeline by six to twelve months and add 15% to 20% to integration costs. The current share price embeds an assumption that the merger completes within the expected window, and a meaningful slippage would create a re-rating headwind.

The second risk is the De Beers diamonds disposal. Anglo American has written down the De Beers business by USD 2.3 billion, the third reduction in three years, as the diamond market continues to weaken. The company has been working to sell or demerge the majority-owned diamond unit, but the buyer pool is shallow at current valuations. A forced disposal at a discount, or an extended timeline before a clean separation, ties capital and management attention to a non-core asset and dilutes the cleaner copper-focused narrative that the Teck merger is intended to deliver.

The third risk is the steelmaking coal sale. After Peabody Energy pulled out of its agreement to buy Anglo American’s remaining metallurgical coal mines, the company initiated arbitration proceedings against Peabody and re-launched the disposal process. Until those assets are off the balance sheet, Anglo American carries a coal exposure that does not fit its critical minerals positioning. The market is currently giving the company the benefit of the doubt on these disposals, but a slower-than-expected timeline would weigh on the valuation multiple over the next 12 to 18 months.

What did Goldman Sachs, Morgan Stanley and Citigroup say about the 2026 copper price outlook?

Sell-side positioning on copper has shifted meaningfully bullish in 2026. Morgan Stanley analysts are forecasting the global copper market will face its most severe deficit in more than two decades, with demand expected to exceed supply by approximately 600,000 tonnes in 2026, and the shortfall widening from there. Citigroup has advised clients that copper could reach USD 15,000 per tonne in a bull case, supported by a weakening US dollar and Federal Reserve rate cuts that would further enhance the metal’s appeal to financial buyers.

Goldman Sachs has been more measured. The bank’s December 2025 view was that copper would consolidate around USD 11,400 per tonne in 2026 amid tariff uncertainty, with longer-term projections targeting USD 15,000 by 2035. Goldman Sachs has cautioned that the rally to date has been driven primarily by investor bets on future market tightness rather than current supply and demand fundamentals, suggesting that a short-term consolidation phase is still possible before the structural bullish thesis reasserts.

The cross-bank consensus is that copper miners with high-quality copper portfolios will see operating leverage flow through to earnings faster than the headline commodity price moves suggest. A 10% rise in copper prices typically lifts mining company earnings by 20% to 30% on operating leverage alone. Anglo American, with the planned Teck combination and roughly 70% pro forma copper exposure, sits in the sweet spot of that operating leverage trade.

How are retail investors on Twitter/X and London Stock Exchange forums positioning around the FTSE 100 mining complex?

Retail conversation across X and UK forums has clustered around the diversified miners as the cleanest expression of the copper supercycle thesis. The cashtag $AAL carried elevated mention volume through Monday’s London session, with forum threads emphasising the Teck merger upside layered onto the underlying commodity move. The narrative most commonly cited is the convergence between AI data centre power infrastructure demand, electric vehicle build-out, and global grid modernisation, all of which require copper at multiples of historical intensity.

The pushback from the bear camp focuses on two concerns. The first is the production reliability question at Quellaveco and Collahuasi, given the lower ore grades and the operational challenges that drove the 2025 production miss. The second is the valuation multiple. Anglo American is now trading well above its 200-day moving average, and the implied forward multiples already embed meaningful merger completion certainty. If either the merger timeline slips or copper consolidates rather than continuing higher, the share price could give back some of the recent gains.

For retail investors entering the position today, the analytical question is whether the China sulphuric acid policy will be extended into 2027 and beyond, and whether the Chilean copper supply response to higher prices is structurally constrained or merely delayed. Both questions are non-obvious from public commodity market data and require monitoring of Chinese trade policy filings and Chilean mining ministry permitting announcements through the second half of 2026.

What are the key takeaways from the Anglo American share price rally and the FTSE 100 mining complex move on 11 May 2026?

• Anglo American shares closed 3.92% higher at GBX 4,000.00 on the LSE on 11 May 2026, leading a broad-based mining complex rally as LME copper rose 3.08% to USD 6.44 per pound on the back of confirmed Chinese sulphuric acid export halts and Chinese manufacturing PMI at a five-year high.
• The sulphuric acid story links the Iran war through the Strait of Hormuz sulphur shortage to a 70% rise in sulphur prices, a 44% one-month rise in Chilean acid prices, and tighter refined copper supply at hydrometallurgical operations including Anglo American’s Los Bronces and Collahuasi mines.
• The Anglo American Teck Resources merger, approved by shareholders in December 2025 and cleared under the Investment Canada Act, targets approximately USD 800 million of annual pre-tax synergies, with an additional USD 1.4 billion of EBITDA uplift expected from optimising adjacent Collahuasi and Quebrada Blanca copper assets between 2030 and 2049.
• Final merger completion remains subject to Chinese MOFCOM and other multi-jurisdictional regulatory approvals, with current management guidance targeting completion between late 2026 and early 2027.
• Sell-side positioning has turned increasingly bullish on copper, with Morgan Stanley forecasting a 600,000 tonne deficit in 2026, Citigroup flagging a USD 15,000 per tonne bull case, and Goldman Sachs maintaining a structural view that targets USD 15,000 per tonne by 2035.
• Anglo American’s broader portfolio reshape continues, with the De Beers diamonds disposal, the metallurgical coal sale following the Peabody Energy arbitration, and the Woodsmith polyhalite crop nutrients project all running in parallel to the core copper consolidation.
• Execution risks include slippage on the merger timeline, valuation multiple compression if copper consolidates rather than extending higher, and continued operational disappointment at Quellaveco and Collahuasi where lower ore grades have already weighed on 2025 and Q4 production.