Commodity Currencies & Terms of Trade: Why Exports Drive FX

Some currencies don’t just respond to interest rates; they respond to what’s being dug out of the ground or shipped across oceans.
We call these commodity currencies, and they move with the price of what their countries export.

What Are Commodity Currencies?

Commodity currencies are currencies from economies that rely heavily on natural resource exports.
Their strength or weakness is tied to the price of the commodities they sell.

The three most important are:

• AUD, tracks iron ore and coal exports
• CAD, tied to crude oil and energy prices
• NZD, linked to dairy and agriculture exports

Terms of Trade & Currency Impact

When commodity prices rise, these countries earn more from exports.
That improves their terms of trade, meaning they get more value per unit of exports relative to imports.
This often strengthens the currency, as more foreign buyers need to purchase that currency to pay for the exports.

For example:

• If iron ore prices surge, AUD/USD often rises.
• When oil rallies, USD/CAD can fall, meaning the Canadian dollar strengthens.

Market Dynamics & Risk Factors

But there’s another layer: China’s demand.
Since China is a major buyer of commodities, slowdowns in Chinese growth can weaken AUD and NZD, even if interest rates stay unchanged.
Also, commodities are priced in USD. So when the dollar is strong, it often pushes commodity prices down, creating a feedback loop that can hurt exporters.

Conclusion

So, when you trade AUD, CAD, or NZD, you’re not just trading currencies.
You’re trading global demand, commodity prices, and trade dynamics.

If this gave you a new lens on the market, let us know in the comments. And follow Errante Academy to keep sharpening your global macro trading skills.