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Why Do Oil Prices Go Up and Down?

Oil is the most traded commodity on earth - and its price affects everything from your fuel bill to airline tickets to the cost of groceries. Here's what actually moves it.

⚡ 2026 Context

As of spring 2026, oil markets face a tug-of-war: oversupply from US shale and non-OPEC producers is pushing prices down, while the Middle East conflict that began February 28, 2026 threatens the Strait of Hormuz - the world's most critical oil chokepoint. Reports of stalled US-Iran nuclear talks in April 2026 added a fresh geopolitical premium.

1. OPEC+ Production Decisions

OPEC+ - the 23-nation alliance led by Saudi Arabia and Russia - collectively controls roughly 40% of global oil supply. When the group agrees to cut production, less oil reaches the market, prices rise. When it pumps more, the opposite happens. Announcements from OPEC+ meetings can move oil prices 3–5% in a single day.

Since 2022, internal discipline has been a persistent problem - several members, including the UAE and Iraq, have repeatedly exceeded their agreed quotas, effectively increasing supply and undermining Saudi Arabia's efforts to support prices.

2. Geopolitical Disruptions

Oil infrastructure is concentrated in geopolitically volatile regions. The Middle East holds the world's largest proven reserves, and conflicts in the region instantly raise the spectre of supply disruption even when actual output is unaffected. The Strait of Hormuz - the narrow waterway between Iran and Oman - carries about 20 million barrels per day. Any credible threat to that corridor moves markets immediately.

Russia's invasion of Ukraine in 2022 removed a major supplier from accessible markets, pushing Brent above $120/bbl at its peak. Sanctions, insurance restrictions, and shipping bans fundamentally restructured global oil trade flows.

3. US Shale Production

The US shale revolution transformed global oil markets from 2010 onwards. America became the world's largest oil producer, and US shale acts as a natural ceiling on prices - when oil rises above roughly $70–$80/bbl, shale producers rapidly increase drilling, adding supply that caps further price gains.

This "shale put" is one reason oil has struggled to sustain the extreme highs seen before 2014. In 2025, US output hit record levels, contributing to the global supply glut that pushed Brent toward $60/bbl.

4. Global Demand - Especially China

China is the world's largest oil importer. When Chinese economic growth accelerates, demand for oil surges - for manufacturing, transport, and petrochemicals. When China's economy slows, as it did through 2024–2025, demand growth disappoints and weighs on prices globally.

The long-term transition to electric vehicles adds another demand variable. IEA forecasts show oil demand growth slowing materially through the late 2020s as EV adoption accelerates, particularly in Europe and China.

5. The US Dollar

Like gold, oil is priced in US dollars globally. A stronger dollar makes oil more expensive for countries paying in other currencies, which reduces demand and weighs on price. A weaker dollar does the opposite. Dollar movements can add or subtract $2–$5/bbl from oil prices independent of any supply or demand change.

Frequently Asked Questions

Who controls oil prices?

No single entity controls oil prices, but OPEC+ (the Organization of Petroleum Exporting Countries plus allies like Russia) has the most influence. The group collectively manages about 40% of global supply and can raise or lower prices significantly through production cuts or increases. US shale producers and market speculation also play major roles.

Why do petrol and diesel prices at the pump lag behind crude oil?

There are several steps between crude oil and the forecourt price: refining, transport, distribution, taxes, and retailer margins. Each adds a buffer. When crude rises sharply, these layers absorb the shock temporarily. When crude falls, retailers are often slow to pass on savings. The lag is typically 2–4 weeks.

How does war in the Middle East affect oil prices?

The Middle East produces roughly 33% of global oil and is home to the Strait of Hormuz, through which approximately 20% of the world's daily oil supply passes. Any conflict threatening this chokepoint immediately adds a 'war premium' to oil prices - even if no supply is actually disrupted yet. Markets price in risk, not just reality.

Why did oil prices fall through 2025 into 2026?

A combination of factors weighed on prices: OPEC+ members repeatedly exceeded their production quotas, US shale output hit record highs, and Chinese demand growth slowed as its economy struggled. The World Bank projected Brent crude averaging around $60/bbl in 2026 - well below its 2022 peak above $120.

What is the difference between WTI and Brent crude?

WTI (West Texas Intermediate) is the US benchmark crude, priced at Cushing, Oklahoma. Brent is the international benchmark, priced off North Sea crude. Brent typically trades at a slight premium to WTI due to its global usage as a pricing reference. Both track closely but can diverge on US-specific supply or logistics factors.

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