Iron Ore & Coal: Iron ore near the cost-curve margin as strong supply and soft Chinese steel demand pressure higher-cost tonnes
UBS finds that iron ore at about US$94/t is close to the 90th-percentile value-in-use cost of about US$91/t, potentially rendering roughly 140Mt of supply cash negative. The report also tracks softer shipments from several marginal producers while identifying Simandou ramp-up as a meaningful near-term supply risk.
Summary
UBS finds that iron ore at about US$94/t is close to the 90th-percentile value-in-use cost of about US$91/t, potentially rendering roughly 140Mt of supply cash negative. The report also tracks softer shipments from several marginal producers while identifying Simandou ramp-up as a meaningful near-term supply risk.
- About 170Mt of output sits in the 90th percentile of the iron-ore value-in-use cost curve.
- UBS estimates roughly 140Mt of production could be cash negative at current prices.
- China crude-steel output was down about 3% in January-July, while traditional-market iron-ore shipments were up 1% in 2026 to date.
- Simandou shipments rose to an annualized run rate of about 39Mtpa in September.
- UBS retains Neutral ratings on Vale, BHP, Rio Tinto and Fortescue, and a Sell rating on Kumba Iron Ore.
Report Interpretation
Overview
This UBS Global Research deep dive examines whether low iron-ore prices are beginning to force marginal, higher-cost supply out of the market, while also providing a broad dashboard of iron-ore and coal supply, demand, inventories, prices and trade flows. UBS concludes that supply pressure is emerging at smaller producers, but the broader iron-ore balance remains soft because shipments are strong and Chinese steel demand is weaker.
Core views
UBS argues that the iron-ore cost curve has steepened as energy and freight costs and broader inflation have risen. Wood Mackenzie data indicate about 170Mt of production in the 90th percentile of the value-in-use cost curve: approximately 46Mt in China, 40Mt in Australia, 7Mt in Brazil and 80Mt elsewhere. With iron ore around US$94/t, close to the estimated 90th-percentile level of about US$91/t, UBS estimates that about 140Mt of supply could be cash negative. This creates pressure for marginal tonnes to leave the market, although the report frames this as an emerging supply response rather than evidence of a broad-based shutdown. Shipment data point to weakening output at some higher-cost, smaller producers. Sino Iron at Cape Preston ships about 15Mtpa and is positioned near the top of the value-in-use cost curve; its May-to-September shipment run rate averaged about 7.5Mtpa, roughly 50% lower. Other Australian junior producers using Utah Point, Geraldton, Esperance and Fremantle averaged about 40Mtpa over May-September, around 5% below their five-year average of about 45Mtpa. In Brazil, Port Sudeste serves regional Minas Gerais producers with annual volumes of about 26Mtpa, but its September monthly run rate was about 18Mtpa. CSN's Sepetiba shipments were down about 5% year to date, and September annualized volumes softened to 2.8Mtpa versus a roughly 3.2-3.3Mt average over the prior three years. The broader iron-ore backdrop nevertheless remains weak. Prices fell to about US$94/t despite higher freight costs; Australia-to-China freight was about US$19/t and Brazil-to-China about US$41/t, versus roughly US$9/t and US$23/t in January-February. On an FOB basis, prices were close to 18-month lows. China port inventories declined week on week to about 150Mt, but UBS notes that more than 60% supports blending and mill inventories and is not available for spot purchase; mill inventories also increased ahead of Golden Week. Traditional-market iron-ore shipments were up about 1% in 2026 to date, while Chinese 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, so weaker steel output rather than a sharp utilization decline is the key demand signal. UBS identifies Simandou as a material near-term downside risk for the supply balance. Simandou shipments accelerated in September to an annualized run rate of about 39Mtpa. The report therefore juxtaposes localized curtailment pressure among high-cost suppliers with new large-scale supply entering the market, reinforcing its view that price and margin conditions remain challenging. For iron-ore equities, UBS lists Neutral ratings on Vale, BHP, Rio Tinto and Fortescue and a Sell rating on Kumba Iron Ore. Its interactive model estimates spot 2027 free-cash-flow yields of 4% for BHP and 7% each for Rio Tinto and Vale. These are company-specific published ratings within a report whose main subject is the iron-ore and coal market, not a single-company recommendation. The coal sections function as a market-monitoring dashboard. Coal shipments were broadly flat year on year, OECD coal-fired generation was lower year on year in 2026, China domestic coal production remained strong while imports were trending lower, and coal was meaningfully cheaper than gas on an adjusted European power-generation basis. UBS also shows Newcastle coal converging with other thermal-coal benchmarks. Its coal-to-gas comparison adjusts fuel prices for thermal efficiency and carbon costs, illustrating why relative fuel economics matter for power-generation choices.
Analysis framework
UBS combines shipment datasets, producer and port-level volume trends, a value-in-use iron-ore cost curve, Chinese steel and inventory indicators, freight-adjusted price comparisons and positioning data. For coal, it tracks seaborne flows, regional production and imports, OECD power generation, and gas-versus-coal economics adjusted for efficiency and carbon costs.
Methodology notes
Iron-ore value-in-use cost curve
UBS compares the iron-ore price with the 90th-percentile cost level to identify output likely to face margin pressure or become cash negative.
Iron-ore supply-demand monitoring
The report assesses shipments, new Simandou supply, Chinese steel production, inventories and exports together to judge market tightness.
Coal-to-gas conversion comparison
UBS adjusts coal and gas prices for power-plant efficiency and carbon costs to compare the economics of generating electricity with each fuel.
Spot 2027 free-cash-flow yield
UBS presents modeled spot-price 2027 free-cash-flow yields for selected iron-ore producers as an equity valuation indicator.
Asset mapping & comparison
Structured mapping from thesis to named assets (strengths, weaknesses, peers, risks).
- BHPIron-ore producer covered in UBS's equity-rating table.
- Strengths
- UBS estimates a spot 2027 free-cash-flow yield of 4%.
- Weaknesses
- Exposed to soft iron-ore fundamentals and supply growth.
- Comparison
- Lower modeled spot 2027 free-cash-flow yield than Rio Tinto and Vale at 7% each.
- Risks
- Commodity-price, currency, political, financial and operational risks cited for the resource sector.
- Rio TintoIron-ore producer covered in UBS's equity-rating table.
- Strengths
- UBS estimates a spot 2027 free-cash-flow yield of 7%.
- Weaknesses
- Exposed to soft iron-ore fundamentals and supply growth.
- Comparison
- Modeled 2027 free-cash-flow yield matches Vale and exceeds BHP's 4%.
- Risks
- Commodity-price, currency, political, financial and operational risks cited for the resource sector.
- ValeIron-ore producer covered in UBS's equity-rating table.
- Strengths
- UBS estimates a spot 2027 free-cash-flow yield of 7%.
- Weaknesses
- Exposed to soft iron-ore fundamentals and supply growth.
- Comparison
- Modeled 2027 free-cash-flow yield matches Rio Tinto and exceeds BHP's 4%.
- Risks
- Commodity-price, currency, political, financial and operational risks cited for the resource sector.
- Fortescue Metals GroupIron-ore producer covered in UBS's equity-rating table.
- Strengths
- UBS maintains a Neutral rating.
- Weaknesses
- Exposed to depressed iron-ore pricing and soft market fundamentals.
- Comparison
- UBS also rates Vale, BHP and Rio Tinto Neutral.
- Risks
- Commodity-price, currency, political, financial and operational risks cited for the resource sector.
- Kumba Iron OreIron-ore producer covered in UBS's equity-rating table.
- Weaknesses
- UBS assigns a Sell rating.
- Comparison
- The only Sell rating among the named major iron-ore producers in this 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 90th-percentile value-in-use cost of about US$91/t.
- 90th-percentile iron-ore cost-curve output~170MtIncludes about 46Mt in China, 40Mt in Australia, 7Mt in Brazil and 80Mt in the rest of the world.
- Potential cash-negative iron-ore output~140MtUBS estimate at prevailing iron-ore price and margin conditions.
- Sino Iron shipment run rate~7.5MtpaMay-September average, about 50% lower.
- China crude-steel production-~3%January-July change based on NBS and CISA data.
- Traditional-market iron-ore shipments+1%2026 year-to-date change.
- Simandou shipment run rate~39MtpaSeptember run rate and a meaningful near-term supply risk according to UBS.
- China iron-ore port inventories~150MtDown week on week; more than 60% supports blending and mill inventories rather than spot availability.
Impact & implications
UBS sees pressure building on high-cost marginal iron-ore suppliers, but does not view this alone as sufficient to offset soft demand and continued large-scale supply. The ramp-up of Simandou is highlighted as a key downside supply risk, while coal’s relative discount to gas supports its competitiveness in European power generation on the report’s adjusted comparison.
Risks
- Resource-sector performance can be materially affected by commodity-price and currency movements that differ from the report's assumptions.
- Political, financial and operational risks can significantly affect company and industry performance.
- Simandou's ramp-up represents a meaningful near-term risk to iron-ore supply.
What to watch
- Shipment trends at Sino Iron, Australian junior producers, Port Sudeste and CSN's Sepetiba port for evidence of marginal supply exits.
- Simandou shipment ramp-up and its contribution to seaborne iron-ore supply.
- China steel production, blast-furnace utilization, steel exports and iron-ore inventories.
- Iron-ore prices relative to the value-in-use cost curve and freight rates.
- Coal shipment trends, China domestic production and imports, OECD coal generation, and coal-versus-gas economics.