Brent crude’s expiring December contract settled at $117.64 a barrel on October 30, its highest level since April, a day after a tanker was struck by explosives in the Strait of Hormuz. Oil price correlation describes how a move like that tends to spread into other markets, and in 2026 it has reached almost all of them. US inflation climbed to 3.7% in September, and the Federal Reserve raised interest rates that month for the first time since 2023. The links run through inflation, currencies and stocks, and how strongly each one holds depends on why oil moved in the first place.
Quick answer: Oil price correlation is the tendency of other markets to move with crude oil or against it. Higher oil prices tend to lift inflation and can push central banks toward higher rates. They often support exporters’ currencies, like the Canadian dollar, and help energy shares while hurting airlines. Each link can weaken or reverse depending on what caused the oil move.
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What Is Oil Price Correlation?
It’s a measure of how closely another market’s price changes have matched oil’s over a set period, expressed as a number between -1 and +1. A reading near +1 means the two tended to rise and fall together, a reading near -1 means they tended to move in opposite directions, and a reading near zero means there was little consistent link.
The number describes the past, and it changes with the window you measure, such as 30 days or five years. It also says nothing about cause. Oil and a currency can move together because both are reacting to something else, like a shift in expectations for global growth.
Correlations can flip, too. Economists at the Federal Reserve Bank of San Francisco found in August 2026 that the correlation between US stocks and oil had changed sign in recent years, which they read as a sign that supply shocks had become the bigger risk to the economy.
How a Barrel of Crude Reaches the Inflation Numbers
Oil reaches inflation fastest through fuel. A barrel holds 42 US gallons, and crude made up 51.4% of the US gasoline price in 2025, with refining, distribution and taxes making up the rest.
Worked Example: Brent to the Pump to CPI
- Crude: Brent averaged $69 a barrel in 2025 and $114 in September 2026, a rise of $45
- Per gallon: spread across 42 gallons, that’s about $1.07 more in crude cost for every gallon
- At the pump: US gasoline averaged $3.10 a gallon in 2025 and $4.35 in September 2026, a rise of $1.25
Crude explains most of that $1.25. The remaining 18 cents or so came through refining and distribution, because fuel taxes are mostly charged per gallon and barely move with the price. The pump price then feeds into the Consumer Price Index.
| Category | Change over 12 months to September 2026 |
|---|---|
| Gasoline | +34.2% |
| Fuel oil | +74.2% |
| Airline fares | +22.4% |
| Energy overall | +20.4% |
| All items (headline CPI) | +3.7% |
| All items less food and energy (core CPI) | +2.6% |
Figures from the BLS Consumer Price Index, September 2026.
Most of the gap between the 3.7% headline and 2.6% core comes from energy. Airline fares show the next step, where fuel costs work their way into the price of services.
When Oil Reaches Interest Rates
Central banks often look past a short fuel spike, since energy prices can fall as fast as they rose. They pay closer attention when fuel costs start showing up in airfares, deliveries and wages. The Fed raised its target range to 3.75% to 4% on September 16, then held it on October 28 with two officials voting for another increase. Our article on central bank decisions covers how markets react on the day, and our gold article shows how those rate bets reached gold in October.
Oil Price Correlation With Currencies
Crude is priced in US dollars around the world, which ties oil to currency markets in more than one way.
- Exporters: Canada and Norway earn more foreign currency when oil rises, and their currencies have often strengthened with crude
- Importers: Japan and India face a bigger fuel bill, which can weigh on the yen and the rupee
- The dollar: a weaker dollar makes oil cheaper for buyers paying in other currencies, and the US became a net petroleum exporter in 2020 for the first time since at least 1949, which changes how the dollar itself responds to crude
The Canadian Dollar in 2026
The Canadian dollar is the textbook oil currency, and 2026 showed how loose that link can get. Between late February and April 22, West Texas Intermediate crude rose about 34% while the Canadian dollar slipped 0.2% against the US dollar, according to Bloomberg. One analyst pointed to Canadian oil companies paying a large share of their revenue out to shareholders, about three-quarters of whom live outside Canada, which means less of that money gets changed into Canadian dollars. Scotiabank’s Olivier Gervais said the link could return if future oil gains were driven more clearly by global demand. The forex page explains how rates and commodity prices move currency pairs.
Oil Price Correlation in the Stock Market
Higher oil prices create winners and losers inside the same index. Producers earn more on every barrel, often faster than their costs rise. Airlines, shipping firms and delivery companies feel oil as a cost, and consumer businesses lose out when households spend more on fuel.
Jet fuel shows how sharp that cost can get. It averaged about $85 to $90 a barrel before the strikes on Iran in February, according to IATA, and peaked above $170 during the conflict, Reuters reported. When oil dropped back in June, airline shares rallied to a record.
| Market | Move | Period |
|---|---|---|
| WTI crude oil | Up about 34% | Late February to April 22, 2026 |
| Canadian dollar against the US dollar | Down 0.2% | Late February to April 22, 2026 |
| S&P 500 energy sector | Up more than 50% | 2026 to late October |
| S&P 500 consumer discretionary sector | Down about 7% | 2026 to late October |
| S&P 500 passenger airlines index | Up nearly 13% | June 12 to June 24, 2026, as oil fell |
Sources: Bloomberg via Canadian Mortgage Trends, The Motley Fool and Reuters via GV Wire.
Supply Shocks and Demand Shocks Pull Markets Apart
The cause of an oil move tends to decide which correlations hold. When oil rises because the world economy is growing and burning more fuel, stocks, crude and exporter currencies often climb together, since strong demand helps company sales as well as oil producers.
When oil rises because supply is cut, as with the attacks on shipping around Hormuz, higher fuel costs work more like a tax on households and businesses. Shares outside energy can fall while crude climbs, and central banks face higher inflation alongside slower growth. The San Francisco Fed economists noted that since 2025, rising uncertainty about oil has come with higher oil prices, a pattern that points to supply problems.
That fits 2026. Crude and energy shares rose together, while the Canadian dollar and the consumer side of the stock market didn’t follow. Futures markets expect the squeeze to last a while, with Brent for October 2027 delivery trading above $90 at the end of October.
On SelfMSF, crude oil is traded as a CFD [CONFIRM], which means you take a position on the price moving up or down without owning or storing any oil. Our Fundamental Analysis Guide covers inventories and production decisions in more detail.
Key Takeaways
- Correlations between oil and other markets describe past tendencies, and they can weaken or flip.
- Crude made up about half the US gasoline price in 2025, which is why oil reaches inflation data quickly.
- Fuel costs can push central banks toward higher rates once they spread into services like airfares.
- Exporter currencies like the Canadian dollar often follow oil, though that link weakened sharply in 2026.
- Supply-driven oil spikes tend to lift energy shares and weigh on fuel-heavy businesses and consumer spending.
Frequently Asked Questions
Is oil positively correlated with the stock market?
Oil and the stock market can move together or apart depending on why oil is moving. When strong global demand lifts crude, stocks often rise too. When a supply shock lifts crude, higher costs can weigh on most companies outside energy. Economists at the San Francisco Fed found the stock and oil correlation changed sign in recent years.
How do oil prices affect inflation?
Oil prices affect inflation first through fuel and then through the cost of transport and services. Gasoline and other energy items feed directly into the Consumer Price Index. In September 2026, US gasoline prices were 34.2% higher than a year earlier and airline fares were up 22.4%, while headline inflation reached 3.7%.
Why does the Canadian dollar follow oil prices?
The Canadian dollar has tended to follow oil because crude is one of Canada’s largest exports, and higher prices bring more US dollars into the country. The link can loosen for long stretches. Between late February and April 2026, WTI rose about 34% while the Canadian dollar slipped 0.2% against the US dollar.
Does a weaker US dollar raise oil prices?
A weaker US dollar can support oil prices, because crude is priced in dollars and gets cheaper for buyers paying in euros, yen or other currencies. That can lift demand a little. Supply news usually has a bigger effect, and in 2026 the disruption around Hormuz did far more to move crude than the dollar did.