What Moves the Oil Price: Supply, OPEC, the Dollar and Geopolitics
Macro Guide, 2026
By Ken Chigbo, Founder, KenMacro, UK macro desk.
Updated 2026-05-25
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The short answer
Oil is a global commodity priced at the margin, so its price is set by the balance between supply and demand, plus a risk premium for anything that threatens that balance. The main drivers: OPEC and the wider OPEC+ group, whose production quotas swing supply more than any other single force; global demand, which tracks the economic cycle and China in particular; the US dollar, since oil is priced in dollars, so a stronger dollar tends to weigh on crude; inventories and spare capacity, the buffer that absorbs shocks; and geopolitical risk, where threats to key shipping chokepoints like the Strait of Hormuz add a premium that drains away when tension eases. The desk reads oil as supply-and-demand fundamentals with a geopolitical premium layered on top, which is exactly why crude fell back in 2026 as the Iran risk premium unwound.
Supply: OPEC+, US shale and spare capacity
The supply side is dominated by decisions, not just geology. OPEC and its allies in OPEC+ control a large share of world production and set quotas that can add or withhold millions of barrels a day, which makes their meetings the single biggest scheduled swing factor for crude. Outside the cartel, US shale has become the flexible producer that ramps up when prices are high and pulls back when they fall, putting a soft ceiling and floor around the market. Underneath both sits spare capacity, the cushion of production that can be brought online quickly, held mostly by Saudi Arabia. When spare capacity is ample the market shrugs off disruptions, and when it is thin even a small threat to supply sends prices sharply higher, because there is little buffer left.
Demand: the cycle, China and the dollar
Demand for oil rises and falls with the global economy, so crude is one of the most cyclical assets there is. When growth is strong, factories, freight and travel burn more fuel and prices firm, and when a recession looms, demand fear alone can knock prices down well before consumption actually falls. China matters more than any other single country here, as the largest importer of crude, so its growth and its stimulus decisions move the oil market directly. The US dollar adds another layer: because oil is priced in dollars, a stronger dollar makes crude more expensive for buyers using other currencies, which tends to dampen demand and weigh on the price, while a weaker dollar does the reverse.
Which broker for this
You cannot trade any of this without a broker that fits how you actually trade. The desk’s stack, by what you need most.
See all eight brokers KenMacro approves, with the honest caveats
Inventories and the geopolitical risk premium
Between the slow forces of supply and demand sits the real-time scoreboard: inventories. Weekly stock data, most closely watched in the United States, tells the market whether supply is currently outpacing demand or falling behind, and surprises in that data move prices immediately. Layered on top is the geopolitical premium, the extra price the market pays for the risk that supply could be cut off. The clearest example is the Strait of Hormuz, the narrow waterway through which a large share of the world’s seaborne oil passes, where any threat to traffic can add a premium in hours. That premium is not a forecast of an actual disruption, it is insurance against the possibility, which is why it inflates fast on escalation and drains just as fast on signs of de-escalation, as it did through 2026.
How the desk weighs it, and how to trade oil
The desk reads oil fundamentals first: where OPEC+ is steering supply, what the demand cycle and China are doing, and what inventories say week to week. The geopolitical premium is the overlay on top, the factor that produces the biggest and fastest moves and that has no calendar, since a headline can arrive at any hour. That combination is why oil can sit quietly for weeks and then gap on a single news line. For traders, crude is available as WTI and Brent through CFD accounts, and the same discipline applies as with gold: a broker that prices the contracts tightly and position sizing that respects oil’s large daily ranges. The desk’s broker picks for trading crude are below.
The desk’s checklist
- Track OPEC+ decisions. Production quotas from OPEC and its allies are the single biggest scheduled swing factor for crude. Mark the meetings and the guidance.
- Watch global demand and China. Oil is highly cyclical. Strong growth firms prices, recession fear knocks them, and China as the largest importer moves the market directly.
- Factor in the dollar. Because oil is priced in dollars, a stronger dollar tends to weigh on crude and a weaker dollar tends to support it.
- Read weekly inventories. Stock data is the real-time tell on whether supply is outpacing demand. Surprises move the price immediately.
- Respect the geopolitical premium. Threats to chokepoints like the Strait of Hormuz add a premium that inflates and drains fast and arrives with no calendar. Size for the gap risk.
Frequently asked
What is the biggest driver of oil prices?
The balance between global supply and demand, with OPEC and OPEC+ production decisions the single biggest swing factor on the supply side. When the group adds or withholds barrels it can move the market more than almost anything else, with demand and the dollar shaping the trend around it.
How does the US dollar affect the oil price?
Oil is priced in US dollars, so when the dollar strengthens, crude becomes more expensive for buyers using other currencies, which tends to dampen demand and weigh on the price. A weaker dollar tends to support oil. It is one driver among several, not the whole story.
Why does the Strait of Hormuz matter for oil?
The Strait of Hormuz is a narrow shipping chokepoint through which a large share of the world’s seaborne crude passes. Any threat to traffic there can add a risk premium to oil within hours, because so much supply depends on that single route. The premium inflates on escalation and drains on de-escalation.
How do I trade oil?
Most retail traders trade crude as WTI or Brent through a CFD account. Because oil moves in large daily ranges and can gap on geopolitical headlines, the priorities are a broker that prices the contracts tightly and position sizing that respects the volatility. The desk’s broker picks are set out in this guide.
Oil is where macro and geopolitics collide, and the moves are fast. Trade WTI or Brent with a broker that prices them tightly:
Which broker for this
You cannot trade any of this without a broker that fits how you actually trade. The desk’s stack, by what you need most.
See all eight brokers KenMacro approves, with the honest caveats
Related from the desk
Educational analysis only, not financial advice. KenMacro has commercial partnerships with some firms referenced and may earn a commission if you open an account, at no cost to you. Manage risk against your own circumstances.
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Where this gets traded
Oil reprices in violent, headline-driven gaps, and execution through a supply shock is the whole game. See the KenMacro desk guide to the best brokers for trading oil.
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