【Market Structure】How Iron Ore Trade Is Structured: From Mine to Steel Mill
Quote from chief_editor on June 4, 2026, 3:00 amIron ore trade structure explained from mine to steel mill. Learn how iron ore is priced, shipped, and contracted in the physical commodity market.
Iron ore trading involves the physical movement of iron ore — the primary raw material for steel production — from mining origins in Australia, Brazil, and other producing countries to steel mills concentrated principally in China, Japan, South Korea, and India. Iron ore is one of the highest-volume physical commodities traded globally by metric tonnage, and the structure of its market reflects the capital intensity of the mining industry, the dominance of a small number of very large producers, and the central role of China as the world's largest steel-producing and iron ore-consuming country.
Iron ore is not a single product. Iron ore refers to rock containing iron-bearing minerals, primarily hematite and magnetite, at concentrations sufficient to justify commercial extraction. The key quality parameter is iron content, expressed as a percentage. The benchmark grade for most price assessments is 62% iron (Fe) fines — a fine-grained form of iron ore that is the most widely traded. Higher grades (65% Fe and above) trade at premiums; lower grades trade at discounts.
How Iron Ore Is Priced
Iron ore pricing shifted from annual benchmark contracts — in which major miners and steel mills negotiated a fixed price for the year — to spot and index-based pricing following the breakdown of the annual benchmark system around 2010. The dominant pricing reference is now the Platts IODEX — the S&P Global Commodity Insights daily assessment of iron ore fines at 62% Fe delivered to China (CFR Tianjin). This index is updated daily and reflects transactions reported by market participants.
Physical iron ore supply contracts typically reference the IODEX or the TSI (The Steel Index, now also published by S&P Global Commodity Insights) on an average-of-month or average-over-a-specific-period basis. For example, a contract might specify that the price for a cargo shipped in May is the average of the daily IODEX assessments for the calendar month of May. The premium or discount to the index is negotiated between buyer and seller and reflects the specific grade, moisture, and origin of the cargo.
The Singapore Exchange (SGX) lists iron ore derivatives contracts used by producers, traders, and steel mills to hedge price exposure. These financial contracts are settled against the published index, allowing parties to separate price risk management from the physical transaction.
The Structure of an Iron Ore Cargo Deal
Major iron ore producers — Rio Tinto, BHP, Vale, and Fortescue — sell the bulk of their output under medium-to-long-term supply agreements with steel mills in China, Japan, and Korea. These agreements specify the volume, the grade specifications, the loading ports, and the pricing mechanism, but not the fixed price.
Cargo sizes are substantial: a Capesize vessel — the standard vessel for iron ore trade — carries approximately 160,000 to 180,000 metric tons. Freight for a Capesize voyage from Australia to China costs, for example, several million dollars per voyage depending on the market rate, and freight cost is embedded in the CFR price or separately invoiced depending on the delivery term.
For a trading company to participate in iron ore, it must either hold offtake agreements from producers or purchase cargo from the spot market. Spot iron ore cargoes are traded between producers, trading companies, and steel mills when production exceeds term contract volumes or when a mill needs additional supply outside its term agreements.
For example, assume a Japanese trading company buys 160,000 metric tons of Australian iron ore (62.5% Fe, low alumina) from Rio Tinto under a term contract priced at IODEX 62% Fe CFR China plus assume $4.50 per dry metric ton, reflecting the quality premium. The trading company arranges a Capesize vessel and sells the cargo to a Chinese steel mill at IODEX plus $5.00 per dry metric ton CFR Qingdao, capturing a $0.50 per metric ton differential on the 160,000 ton cargo — a gross margin of $80,000 before freight optimization.
Iron ore trading is dominated by high volume, thin margins per unit, and the economics of freight optimization — understanding the benchmark pricing mechanism, grade differentials, and Capesize freight markets is the foundation of operating effectively in this commodity.
Iron ore trade structure explained from mine to steel mill. Learn how iron ore is priced, shipped, and contracted in the physical commodity market.
Iron ore trading involves the physical movement of iron ore — the primary raw material for steel production — from mining origins in Australia, Brazil, and other producing countries to steel mills concentrated principally in China, Japan, South Korea, and India. Iron ore is one of the highest-volume physical commodities traded globally by metric tonnage, and the structure of its market reflects the capital intensity of the mining industry, the dominance of a small number of very large producers, and the central role of China as the world's largest steel-producing and iron ore-consuming country.
Iron ore is not a single product. Iron ore refers to rock containing iron-bearing minerals, primarily hematite and magnetite, at concentrations sufficient to justify commercial extraction. The key quality parameter is iron content, expressed as a percentage. The benchmark grade for most price assessments is 62% iron (Fe) fines — a fine-grained form of iron ore that is the most widely traded. Higher grades (65% Fe and above) trade at premiums; lower grades trade at discounts.
How Iron Ore Is Priced
Iron ore pricing shifted from annual benchmark contracts — in which major miners and steel mills negotiated a fixed price for the year — to spot and index-based pricing following the breakdown of the annual benchmark system around 2010. The dominant pricing reference is now the Platts IODEX — the S&P Global Commodity Insights daily assessment of iron ore fines at 62% Fe delivered to China (CFR Tianjin). This index is updated daily and reflects transactions reported by market participants.
Physical iron ore supply contracts typically reference the IODEX or the TSI (The Steel Index, now also published by S&P Global Commodity Insights) on an average-of-month or average-over-a-specific-period basis. For example, a contract might specify that the price for a cargo shipped in May is the average of the daily IODEX assessments for the calendar month of May. The premium or discount to the index is negotiated between buyer and seller and reflects the specific grade, moisture, and origin of the cargo.
The Singapore Exchange (SGX) lists iron ore derivatives contracts used by producers, traders, and steel mills to hedge price exposure. These financial contracts are settled against the published index, allowing parties to separate price risk management from the physical transaction.
The Structure of an Iron Ore Cargo Deal
Major iron ore producers — Rio Tinto, BHP, Vale, and Fortescue — sell the bulk of their output under medium-to-long-term supply agreements with steel mills in China, Japan, and Korea. These agreements specify the volume, the grade specifications, the loading ports, and the pricing mechanism, but not the fixed price.
Cargo sizes are substantial: a Capesize vessel — the standard vessel for iron ore trade — carries approximately 160,000 to 180,000 metric tons. Freight for a Capesize voyage from Australia to China costs, for example, several million dollars per voyage depending on the market rate, and freight cost is embedded in the CFR price or separately invoiced depending on the delivery term.
For a trading company to participate in iron ore, it must either hold offtake agreements from producers or purchase cargo from the spot market. Spot iron ore cargoes are traded between producers, trading companies, and steel mills when production exceeds term contract volumes or when a mill needs additional supply outside its term agreements.
For example, assume a Japanese trading company buys 160,000 metric tons of Australian iron ore (62.5% Fe, low alumina) from Rio Tinto under a term contract priced at IODEX 62% Fe CFR China plus assume $4.50 per dry metric ton, reflecting the quality premium. The trading company arranges a Capesize vessel and sells the cargo to a Chinese steel mill at IODEX plus $5.00 per dry metric ton CFR Qingdao, capturing a $0.50 per metric ton differential on the 160,000 ton cargo — a gross margin of $80,000 before freight optimization.
Iron ore trading is dominated by high volume, thin margins per unit, and the economics of freight optimization — understanding the benchmark pricing mechanism, grade differentials, and Capesize freight markets is the foundation of operating effectively in this commodity.