What Is a Commodity Currency?
What is a commodity currency? It is the currency of an economy that earns much of its export income from raw materials, so it tends to move with their prices. The classic examples are the Australian, Canadian and New Zealand dollars among the majors, and the Norwegian krone, a smaller G10 currency.
The terms-of-trade channel
The link runs through the terms of trade: the price of what a country exports against the price of what it imports. When iron ore rises, Australia earns more for the same shipments. That income strengthens the trade balance, feeds wages and tax revenue, and can push the central bank towards tighter policy. Each step supports the currency, and the same logic runs in reverse when the commodity falls.
Match the currency to its exports
- The Australian dollar follows iron ore and China: iron ore is Australia’s largest export, and China its largest export market (DFAT, 2024-25). See Australian Dollar Fundamentals (AUD) and the Australian dollar COT report.
- The Canadian dollar follows oil: Canada exported 4.3 million barrels of crude a day in 2025, 90.1 percent of it to the US (Canada Energy Regulator). See Canadian Dollar Fundamentals (CAD) and the Canadian dollar COT report.
- The New Zealand dollar follows dairy: milk powder, butter and cheese made up 30 percent of New Zealand’s exports in the year to December 2025 (Stats NZ). See New Zealand Dollar Fundamentals (NZD) and the New Zealand dollar COT report.
- The Norwegian krone follows oil and gas: crude oil and natural gas were 57 percent of the value of Norway’s goods exports in 2025 (Norwegian Petroleum). Its central bank is Norges Bank.
Oil tells you little about the New Zealand dollar, and dairy little about the krone.
A risk-on personality
Demand for commodities rises and falls with global growth, so these currencies tend to be firm when the world economy picks up and soft when it stumbles: the opposite of a safe haven currency. For the Australian dollar, Chinese industrial data can matter as much as Australian data.
An oil rally shows how the channel works across a pair. If crude rises over a quarter, Canada’s export income improves and markets may price a Bank of Canada that stays tighter for longer. Japan, an energy importer, faces a higher import bill. In CAD/JPY the same move pushes the two sides in opposite directions.
Rates and the central banks
Higher export income often reaches the currency through rate expectations. Compare these currencies’ rates with the rest on Interest rate differential by currency pair and, after inflation, on Real interest rates by currency. The decisions that matter most are the RBA Interest Rate Decision, the Bank of Canada Rate Decision and the RBNZ Interest Rate Decision.
Common mistakes
Do not expect the currency to follow every move in the commodity. The link works through income over weeks and months, and it loosens when rate expectations or risk sentiment take over.
Ask why the commodity is moving. A rally on strong global demand supports these currencies twice, through income and through risk appetite. A rally on a supply shock during a slowdown gives a much less clear picture.