A trade defined by two corridors
| Corridor | Character |
|---|---|
| Australia - China | Shortest major long-haul route; the C5 Baltic benchmark; highest-volume corridor globally |
| Brazil - China | Much longer voyage; higher tonne-mile demand per tonne shipped than the Australia route |
Because the Brazil route is roughly three times the distance of the Australia route, a shift in market share between the two origins has an outsized effect on total tonne-mile demand and therefore on Capesize freight rates, independent of any change in total iron ore volumes.
Why Capesize dominates
Iron ore's combination of very high cargo density (it is heavy relative to its volume) and huge single-shipment quantities makes it naturally suited to the largest available bulk carrier class. Capesize vessels, sized specifically around this and the coal trade, carry the overwhelming majority of internationally traded iron ore.
- Very large parcel sizes (often 150,000-300,000+ tonnes per shipment) suit Capesize capacity directly.
- Dedicated export and import terminals on both corridors are built around Capesize dimensions.
- Smaller vessel classes carry iron ore only where port infrastructure cannot accommodate Capesize draft.
What moves iron ore freight
Chinese steel production and construction activity are the dominant demand driver, since China imports the large majority of internationally traded iron ore. Supply-side disruption at either major export corridor — weather in Western Australia, operational or infrastructure issues in Brazil — has an outsized effect on freight given the trade's concentration in two origins and one destination region.
Frequently asked questions
Why does iron ore move almost entirely on Capesize vessels?
Iron ore combines very high cargo density with enormous single-shipment volumes, which matches Capesize capacity closely, and the major export and import terminals on both principal corridors are built specifically around Capesize dimensions.
Why does the Brazil-China route matter more to freight than its volume alone suggests?
Because the Brazil-China voyage is roughly three times the distance of the Australia-China route, so a shift in the origin mix between the two changes total tonne-mile demand — and therefore Capesize freight — even without any change in total iron ore volume shipped.
Who dominates iron ore demand?
China imports the large majority of internationally traded iron ore, driven by its steel production and construction sectors, which makes Chinese industrial activity the single most important demand signal for this trade.