Iron Ore & Coal: Higher-cost iron-ore supply is under pressure, but soft demand and Simandou ramp-up keep the market challenging
UBS estimates that about 140Mt of iron-ore production could be cash negative as prices approach the 90th-percentile cost level. Supply from smaller producers is weakening, but strong traditional-market shipments, softer Chinese steel output and rising Simandou exports remain adverse market signals.
Summary
UBS estimates that about 140Mt of iron-ore production could be cash negative as prices approach the 90th-percentile cost level. Supply from smaller producers is weakening, but strong traditional-market shipments, softer Chinese steel output and rising Simandou exports remain adverse market signals.
- Iron ore at about US$94/t is close to the estimated 90th-percentile VIU cost of about US$91/t.
- UBS estimates roughly 140Mt of production could be cash negative.
- Sino Iron shipments averaged about 7.5Mtpa in May-September, around 50% lower year to date.
- China crude-steel production fell about 3% in January-July, while traditional-market iron-ore shipments rose 1% in 2026.
- Simandou shipments reached an annualized run-rate of about 39Mtpa in September.
- UBS retains Neutral ratings on Vale, BHP, Rio Tinto and Fortescue, and Sell on Kumba Iron Ore.
Report Interpretation
Overview
This UBS Iron Ore & Coal update examines whether lower prices and higher costs are beginning to force marginal iron-ore supply from the market. It finds evidence of softer shipments at several higher-cost operations, but judges the broader iron-ore backdrop to remain difficult because supply is still resilient, Chinese steel demand is softer, and Simandou is adding new tonnes.
Core views
UBS argues that the iron-ore cost curve has steepened as energy, freight and general inflation have raised producers’ costs. Wood Mackenzie data indicate about 170Mt of supply in the 90th percentile of the value-in-use cost curve: about 46Mt in China, 40Mt in Australia, 7Mt in Brazil and about 80Mt elsewhere. With iron ore at about US$94/t, near UBS’s estimated 90th-percentile cost of roughly US$91/t, the firm estimates around 140Mt of production could be cash negative. This places smaller and higher-cost producers under increasing financial pressure. Shipment data offer early signs of that pressure. In Australia, Sino Iron, which UBS places near the top of the VIU cost curve, ships about 15Mtpa from Cape Preston, but its May-September shipment run-rate averaged about 7.5Mtpa, roughly 50% lower year to date. Other Australian junior producers, including Atlas Iron and Karara, averaged about 40Mtpa from May to September, around 5% below their five-year average of about 45Mtpa. In Brazil, Porto Sudeste serves regional Minas Gerais producers with annual volumes of about 26Mtpa, but its September run-rate was about 18Mtpa. CSN’s Sepetiba-port shipments were down about 5% year to date, with September volumes weakening to 2.8Mtpa. Despite these marginal-supply signs, UBS describes iron-ore fundamentals as challenging. Prices softened to US$94/t even as freight increased sharply: Australia-to-China freight was about US$19/t and Brazil-to-China freight about US$41/t, versus about US$9/t and US$23/t respectively in January-February. On an FOB basis, prices were near 18-month lows. Traditional-market iron-ore shipments were up 1% in 2026, while China’s crude-steel production was down about 3% in January-July and finished-steel exports were down about 4% year to date. Blast-furnace utilization was broadly stable, but the demand indicators do not yet show a strong offset to supply. Chinese inventories remain a mixed signal. Port inventories declined week on week to about 150Mt, but UBS notes that more than 60% supports blending and mill inventories rather than being available for spot purchase. Steel-mill inventories had also risen ahead of Golden Week. Meanwhile, Simandou represents a meaningful near-term supply risk: its shipments stepped up to an annualized run-rate of about 39Mtpa in September. UBS also notes that net short positioning in Dalian iron ore rebuilt moderately after collapsing at the end of July. The coal section tracks a separate set of market indicators. Global coal shipments were broadly flat year on year, OECD coal-fired generation was lower in 2026, and China’s domestic coal production was strong while imports trended lower. UBS also highlights that coal had become meaningfully cheaper than gas on an energy-adjusted basis in Europe, and that Newcastle coal was converging with other benchmark prices. These indicators frame coal-market conditions through seaborne supply, Chinese balances, power-generation demand and relative fuel economics. For listed iron-ore producers, UBS retains Neutral ratings on Vale, BHP, Rio Tinto and Fortescue and a Sell rating on Kumba Iron Ore. Its interactive model estimates 2027 spot free-cash-flow yields of 4% for BHP and 7% each for Rio Tinto and Vale.
Analysis framework
UBS combines value-in-use cost-curve analysis with port-shipment data, freight-adjusted pricing, Chinese steel and inventory indicators, and producer-level volume trends. It then assesses the balance between potential marginal-supply exits and resilient major-producer supply, including Simandou’s ramp-up, while using spot free-cash-flow yields to contextualize selected equities.
Methodology notes
Value-in-use iron-ore cost curve
UBS compares iron-ore prices with the 90th-percentile cost level to identify higher-cost supply that may become unprofitable and potentially curtail output.
Iron-ore and coal supply-demand tracking
The report evaluates shipments, new supply, steel production, inventories, imports and power generation to assess commodity-market balance.
Coal-to-gas switching calculation
UBS adjusts coal and gas prices for thermal efficiency and carbon costs to compare the relative economics of power generation fuels.
Asset mapping & comparison
Structured mapping from thesis to named assets (strengths, weaknesses, peers, risks).
- Vale (VALE.N; VALE3.SA)Explicitly covered major iron-ore producer
- Strengths
- UBS estimates a 2027 spot FCF yield of 7%.
- Weaknesses
- Exposed to challenging iron-ore fundamentals and new supply risk.
- Comparison
- Neutral rating, alongside BHP, Rio Tinto and Fortescue.
- Risks
- Commodity-price, currency, political, financial and operational risks cited for the resource sector.
- BHP (BHP.AX; BHPB.L)Explicitly covered major iron-ore producer
- Strengths
- UBS estimates a 2027 spot FCF yield of 4%.
- Weaknesses
- Exposed to challenging iron-ore fundamentals and new supply risk.
- Comparison
- Neutral rating, alongside Vale, Rio Tinto and Fortescue.
- Risks
- Commodity-price, currency, political, financial and operational risks cited for the resource sector.
- Rio Tinto (RIO.AX; RIO.L)Explicitly covered major iron-ore producer
- Strengths
- UBS estimates a 2027 spot FCF yield of 7%.
- Weaknesses
- Exposed to challenging iron-ore fundamentals and new supply risk.
- Comparison
- Neutral rating, alongside Vale, BHP and Fortescue.
- Risks
- Commodity-price, currency, political, financial and operational risks cited for the resource sector.
- Fortescue Metals Group (FMG.AX)Explicitly covered major iron-ore producer
- Weaknesses
- Exposed to challenging iron-ore fundamentals and new supply risk.
- Comparison
- Neutral rating, alongside Vale, BHP and Rio Tinto.
- Risks
- Commodity-price, currency, political, financial and operational risks cited for the resource sector.
- Kumba Iron Ore (KIOJ.J)Explicitly covered iron-ore producer
- Weaknesses
- UBS assigns a Sell rating.
- Comparison
- The only Sell-rated company among the major iron-ore names cited in the report.
- Risks
- Commodity-price, currency, political, financial and operational risks cited for the resource sector.
Key data
- Iron ore price~US$94/tClose to the estimated ~US$91/t 90th-percentile VIU cost level.
- Potential cash-negative iron-ore production~140MtUBS estimate at prevailing iron-ore prices.
- Supply in 90th percentile of VIU curve~170MtIncludes ~46Mt China, ~40Mt Australia, ~7Mt Brazil and ~80Mt rest of world.
- Sino Iron shipment run-rate~7.5MtpaMay-September average; roughly 50% lower year to date.
- China crude-steel production~-3%January-July change based on NBS and CISA data.
- Traditional-market iron-ore shipments+1%Increase so far in 2026.
- Simandou shipment run-rate~39MtpaSeptember annualized run-rate; identified as a meaningful near-term supply risk.
- 2027 spot FCF yieldBHP 4%; Rio Tinto 7%; Vale 7%UBS interactive-model estimates.
Impact & implications
UBS’s analysis suggests that lower prices may pressure high-cost marginal tonnes, but this supply response is not yet sufficient to offset soft Chinese steel demand, resilient traditional supply and the emerging Simandou ramp-up. The firm therefore maintains a cautious, differentiated equity stance rather than a broad positive view of iron-ore producers.
Risks
- Simandou’s ramp-up is identified as a meaningful near-term risk to iron-ore supply.
- Resource-sector performance can be materially affected by commodity prices and currencies that differ from report assumptions.
- Political, financial and operational risks can significantly affect company and industry performance.
What to watch
- Shipment trends from higher-cost Australian and Brazilian producers.
- Simandou shipment volumes following the September run-rate increase.
- Chinese crude-steel production, blast-furnace utilization and steel exports.
- Chinese iron-ore port and steel-mill inventories.
- Freight rates and FOB iron-ore pricing.
- Coal shipments, Chinese domestic production and imports, OECD coal-fired generation, and coal-versus-gas economics.