Terms of trade measure the relative price of a country's exports to its imports — how much import goods a country can buy with a unit of its exports. A lasting improvement in the terms of trade raises national income and can support a currency; a deterioration can weaken it. The link is strongest for commodity-exporting currencies, where export prices move materially with global commodity markets. But terms of trade are not the same as the current account, and the currency impact depends on the cause of the move, the capital-flow response, and the broader regime.
In 30 seconds
- Terms of trade = export prices relative to import prices.
- An improvement raises real income and can support a currency.
- The link is strongest for commodity currencies — see oil and CAD and commodities and AUD.
- Terms of trade are a price ratio; the current account is a flow — they are related but distinct.
- The currency impact depends on cause, capital flows and regime.
What are terms of trade?
Terms of trade: the ratio of a country's export price index to its import price index, usually expressed as a percentage. A rise means the country receives more imports per unit of exports (an improvement); a fall means it receives fewer (a deterioration).
If a country's exports rise in price relative to its imports, its terms of trade improve: the same volume of exports buys more imports, raising real national income. If import prices rise relative to exports (for example, an oil importer hit by higher crude), terms of trade deteriorate, squeezing real income.
Terms of trade vs the current account
These are often confused. Terms of trade are a price ratio. The current account is a flow — the balance of exports minus imports plus income and transfers. A terms-of-trade improvement tends to improve the current account, but not always: if higher export prices reduce export volumes sharply, or if the income gain is spent on more imports, the current account may not improve. Read the flow framework in current account and currency valuation and the balance of payments.
| Concept | What it measures | FX relevance |
|---|---|---|
| Terms of trade | Export prices relative to import prices (a ratio) | Income effect; supports currency when improving |
| Current account | Exports minus imports plus income (a flow) | Flow effect; surplus supports, deficit weakens |
How terms of trade affect exchange rates
The income channel
An improvement in the terms of trade raises real national income. Higher income supports domestic demand and can attract capital, supporting the currency. A deterioration squeezes income and can weaken the currency.
The capital-flow channel
Higher export revenues can increase capital inflows (exporters repatriating foreign currency, or foreign investment attracted by stronger income). This is the link to capital flows. The strength of this channel depends on how export revenues are deployed — repatriated, saved in sovereign wealth funds, or reinvested abroad.
The commodity-currency channel
Commodity exporters see the largest terms-of-trade swings because their export prices move with global commodity markets. CAD, AUD and NZD are the classic examples. Read oil and the Canadian dollar, commodities and AUD, and the country-specific driver guides for AUD, CAD and NZD for the commodity-currency channels.
When the relationship breaks
- The cause matters. A terms-of-trade improvement from a supply-driven export price surge (e.g. a commodity spike) can be seen as temporary and have a smaller currency effect than a demand-driven, persistent improvement.
- Capital flows offset. If higher export revenues are saved abroad rather than repatriated, the currency impact is muted.
- Risk regime dominates. Commodity currencies are also growth-linked; in global risk-off episodes, risk sentiment can override the terms-of-trade channel — see risk-on vs risk-off.
- Intervention. Some central banks lean against terms-of-trade-driven currency moves — see FX intervention.
A practical framework
Identify the country's key export and import prices
↓
Track the terms-of-trade trend and its cause (supply vs demand)
↓
Judge whether the move is persistent or temporary
↓
Assess the capital-flow response (repatriation vs saving abroad)
↓
Combine with the current account and risk regime
↓
Confirm with the currency's correlation to commodity prices
Common mistakes
- Confusing terms of trade with the current account. One is a price ratio, the other a flow.
- Assuming every export-price rise helps the currency. If it is seen as temporary, or revenues are saved abroad, the effect can be muted.
- Ignoring the cause. Supply-driven spikes behave differently from demand-driven improvements.
Frequently asked questions
Do better terms of trade always strengthen a currency?
Not always. They tend to, through the income and capital-flow channels, but the effect depends on persistence, the cause, and how export revenues are deployed. Risk regime can also override the channel.
Which currencies are most sensitive to terms of trade?
Commodity exporters — CAD, AUD and NZD — because their export prices move most with global commodity markets.
What is the difference between terms of trade and the trade balance?
Terms of trade are a price ratio (export prices vs import prices). The trade balance is the value of exports minus imports. A terms-of-trade improvement usually helps the trade balance, but not if volumes fall enough.
How this has played out in practice
The 2022 commodity surge is the textbook case. Energy and food prices spiked after the invasion of Ukraine, producing a sharp divergence in terms of trade between commodity exporters and importers. Commodity-exporting currencies — notably the Canadian dollar, Australian dollar and Norwegian krone — saw their terms of trade improve dramatically as export prices rose, which supported them through the income and capital-flow channels even as global growth slowed. Commodity-importing currencies, by contrast, saw their terms of trade deteriorate as import prices rose, which weighed on real income and, in several cases, the currency.
The episode also illustrates the limits of the channel. The improvement in commodity exporters' terms of trade did not translate one-for-one into currency strength, because risk sentiment turned sharply risk-off and the growth-linked commodity currencies were sold in the panic despite their improved terms of trade. And the cause mattered: a supply-driven price spike driven by a geopolitical shock was seen as less persistent than a demand-driven improvement, so the currency response was more muted than the size of the terms-of-trade move would imply in isolation. The lesson is to read terms of trade alongside the cause, the current account, and the risk regime — never in isolation. Read the commodity-currency channels in oil and CAD and commodities and AUD, and the flow dimension in current account and currency valuation.
What to watch
- The cause of the terms-of-trade move — supply-driven spikes behave differently from demand-driven improvements.
- How export revenues are deployed — repatriation supports the currency; saving abroad mutes the effect.
- The risk regime, which can override the terms-of-trade channel for growth-linked currencies.
Putting it together: a worked read
Suppose a commodity exporter's export prices surge, improving its terms of trade sharply, but its currency barely moves. A naive read would expect the currency to strengthen on the income channel. The first step is to identify the cause: if the surge is supply-driven (a geopolitical shock to a key commodity), it may be seen as temporary, and the currency response is muted. If export revenues are being saved abroad — for example, accumulated in a sovereign wealth fund rather than repatriated — the capital-flow channel is muted too, and the currency impact is small despite the large terms-of-trade move.
The practical steps: identify the country's key export and import prices and track the terms-of-trade trend, judge whether the move is supply-driven (temporary) or demand-driven (persistent), and assess the capital-flow response by watching whether export revenues are repatriated or saved abroad. Then combine with the current account — a terms-of-trade improvement that lifts the current account is more currency-supportive than one absorbed by higher imports — see current account and currency valuation. Check the risk regime: commodity currencies are also growth-linked, so in global risk-off episodes the risk channel can override the terms-of-trade channel — see risk-on vs risk-off. Finally, confirm with the currency's correlation to the relevant commodity price. The framework is: identify the cause, assess the capital-flow response, combine with the current account, and check the risk regime.
Related reading
- Commodity prices and AUD
- Oil and the Canadian dollar
- What drives the Australian dollar
- What drives the Canadian dollar
- What drives the New Zealand dollar
- Current account and currency valuation
- Balance of payments and currency valuation
- Capital flows and FX
Key takeaway
Terms of trade are the relative price of exports to imports. An improvement raises real income and can support a currency, especially for commodity exporters. But the currency impact depends on the cause, persistence, capital-flow response and risk regime. Read terms of trade alongside the current account, never as a substitute for it.
MacroDrivers assesses terms-of-trade and commodity channels across eight major currencies in one structured framework. Explore the platform.