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The U.S. dollar affects commodity prices because most major commodities, from crude oil to gold to copper, are priced and traded in dollars. When the dollar strengthens or weakens, it changes what those commodities cost for buyers around the world. This guide explains how the U.S. dollar affects commodity prices, why the link isn’t fixed, and what that means for investors outside the U.S.
Why commodities are priced in dollars
The main global benchmarks, such as WTI and Brent crude, COMEX gold and CBOT grains, are quoted in U.S. dollars. The dollar is also the world’s main reserve and trade currency. As a result, international buyers and sellers usually settle commodity trades in dollars, even when neither side is American.
The basic relationship
All else equal, commodity prices and the dollar tend to move in opposite directions.
| Dollar move | Effect on foreign buyers | Typical pressure on dollar prices |
|---|---|---|
| Dollar strengthens | Commodities cost more in their currency | Downward |
| Dollar weakens | Commodities cost less in their currency | Upward |
Here’s why. If the dollar rises against the euro, a European refinery needs more euros to buy the same barrel of oil. That can reduce demand, putting downward pressure on the dollar price. Conversely, a weaker dollar makes commodities cheaper for foreign buyers, which can support demand and prices.
Why the link isn’t fixed
The inverse relationship is a tendency, not a rule. Several things can override it:
- Supply shocks. A major disruption, such as an OPEC+ cut or a drought, can push prices up even while the dollar rises.
- Safe-haven demand. In a crisis, both the dollar and gold can rise together as investors seek safety.
- Interest rates. Rate changes affect both the dollar and the cost of holding commodities, which can complicate the relationship.
- Global growth. Strong worldwide demand can lift commodity prices regardless of the currency.
The EIA lists a range of factors behind oil prices, including OPEC supply decisions, demand, inventories and financial markets. The dollar is one input among many.
Gold and the dollar
Gold has a particularly close relationship with the dollar. Because gold pays no interest, a stronger dollar and higher U.S. interest rates can make it less attractive to hold. On the other hand, a weaker dollar and lower rates often support gold. Even so, there are periods when gold and the dollar rise together, especially during market stress.
What this means if you’re outside the U.S.
If you invest in a currency other than the dollar, your returns depend on two things: the commodity’s dollar price and the exchange rate.
Example: suppose gold rises 5% in dollar terms, but the dollar falls 5% against your home currency over the same period. In your currency, your gain may be close to zero. The reverse can happen too, boosting your local-currency return.
Some funds sold outside the U.S. offer currency-hedged versions that aim to reduce this effect. Check a fund’s documents to see whether it hedges currency exposure.
How to watch the dollar
- Follow a dollar index, which tracks the dollar against a basket of major currencies.
- Watch U.S. interest rate decisions and inflation data, which drive the dollar.
- Compare dollar moves with commodity moves over weeks, not single days.
- If you’re outside the U.S., track your own currency’s exchange rate against the dollar.
For how one market reacts to all these forces, see our guide to crude oil trading basics or our gold investment guide.
Frequently asked questions
Does a strong dollar always mean lower commodity prices?
No. A strong dollar tends to weigh on prices, but supply shocks, demand and safe-haven buying can outweigh it.
Why do gold and the dollar sometimes rise together?
In periods of fear, investors may buy both as safe havens, temporarily breaking their usual inverse relationship.
Should non-U.S. investors hedge currency risk?
It depends on your goals and costs. Currency-hedged funds exist, but hedging has its own costs. A licensed adviser can help you decide.
Trading commodities involves risk, including currency risk. Past performance does not guarantee future results. This article is for education only and is not financial advice.
