A plain-English guide to the oil market.

A barrel of oil costs roughly seventy-five dollars today. Three weeks ago it cost ninety-three. The collapse has been the cleanest single market-pricing of the Iran de-escalation flow, and it is doing real work on the inflation outlook the Federal Reserve will read at its July meeting. Understanding what happened requires understanding the structure of the oil market itself: what Brent and WTI are, who actually sets the price, why the futures curve is the most informative single chart in commodities, and what the geopolitical-premium overlay does to the underlying supply-and-demand balance. This is the explainer.

Brent vs WTI

The two published global oil benchmarks are Brent and West Texas Intermediate (WTI). They are different physical grades from different delivery points with different transport economics. The differences matter.

• Brent. A blend of North Sea crude oils delivered FOB Sullom Voe in the Shetland Islands. Sweet (low sulphur) and light (low density). The waterborne benchmark for European, African, and most Asian sovereigns' crude pricing. Traded primarily on ICE Futures Europe.
• WTI. A blend of US light sweet crude delivered at Cushing, Oklahoma. Slightly sweeter and lighter than Brent; the pipeline-locked benchmark for US crude pricing. Traded primarily on NYMEX.

The Brent-WTI spread averaged roughly $2 to $5 per barrel in the pre-2014 sample (WTI cheaper because of pipeline bottlenecks at Cushing). Post-2014 US export liberalisation has compressed the spread to near parity in most regimes. The current spread, with Brent at $73 and WTI at roughly $70, sits near the post-2014 norm.

The curve, and what it tells you

Oil futures trade across maturities from one month to seven years. The shape of the curve is the single most informative chart in commodity macro.

• Backwardation. Front-month prices above back-month prices. The curve slopes downward. Implies tight physical supply: holders of physical barrels are willing to accept lower future prices because they need to monetise the inventory now. Bullish for spot.
• Contango. Front-month prices below back-month prices. The curve slopes upward. Implies ample physical supply: physical holders need compensation to hold inventory, and the futures curve pays the carry. Bearish for spot.

The Brent curve currently sits in modest backwardation: the front month at $73, the six-month forward at $72.40, the one-year forward at $71.80. That is meaningfully tighter than the contango Brent traded in for most of 2024-2025. The carry trade implied is small but positive; physical supply is not loose, and the price collapse has been sentiment-driven on the geopolitical-premium side rather than fundamental-supply driven.

Who actually sets the price

Three structural participants influence the spot price.

1. OPEC+. The Organisation of the Petroleum Exporting Countries plus a partner group (most importantly Russia, Mexico, and a rotating set of smaller producers) controls roughly 40 percent of global crude supply. OPEC+ coordinates production quotas to manage the spot price within an implicit comfort band. Most member-state fiscal break-evens cluster between $75 and $90 per barrel; sustained prices below $75 force production cuts to defend revenue, sustained prices above $90 attract non-OPEC supply that erodes market share.
2. US shale. Roughly 13 million barrels per day of relatively flexible production. US shale can ramp up production in roughly 6 to 12 months in response to sustained price signals. The shale "swing" function is not as quick as OPEC quota changes, but the price response is real.
3. Demand-side. Global oil demand grows at roughly 1 percent per year on trend, with cycle deviations of plus or minus 3 percent. Chinese demand is the largest single source of forward demand uncertainty.

The geopolitical-premium overlay

Above the fundamental supply-demand balance, oil carries a geopolitical risk premium. When tension in any major producing region rises, the option-implied tail risk on supply disruption widens, and the spot price embeds an expected-loss premium for that risk.

The 2026 cycle has been an extreme example. The Iran tension that began in March drove the geopolitical premium from roughly $5 per barrel to a peak of $18 per barrel by early June. Brent ran from $80 to $93 over that period; roughly $13 of the move was geopolitical premium. The subsequent de-escalation has unwound essentially the entire premium, taking spot from $93 to $73 in roughly three weeks.

The current $73 print places Brent below most published OPEC+ fiscal break-evens. If the geopolitical premium is fully unwound and there is no immediate OPEC+ response, Brent could test the $70 level over the next four to six weeks. An OPEC+ production cut would be the cleanest catalyst to defend $75 from below.

What an oil move actually transmits to

Three channels matter for macro pricing:

1. Headline inflation. Energy accounts for about 7 percent of the CPI basket directly and another 3 to 5 percent indirectly through transportation costs. A 20 percent Brent move translates to roughly 1.5 to 2 percentage points of headline CPI over six months.
2. Real-economy growth. Energy is an input cost for non-financial corporates. A sustained 20 percent oil price drop adds roughly 0.3 to 0.5 percent to non-energy corporate earnings on a four-quarter basis.
3. Sovereign current-account flows. Oil-importing economies (Eurozone, Japan, India) benefit from lower oil prices through reduced import bills; oil exporters (Saudi Arabia, Russia, UAE) see fiscal deterioration. The current account shift reverses some of the dollar bid through the petrodollar-recycling channel.

What today's print does to the Fed

A sustained Brent at $73, against the $93 peak, mechanically removes 1 to 1.5 percentage points from the next two headline CPI prints. The Michigan 5-year inflation expectation that spiked on the gasoline-driven CPI in May should partially revert. Both effects feed into the Warsh framework's "look-through" framing.

The Committee will not respond to today's oil move directly. It will respond to the second-round transmission into headline CPI, supercore inflation, and inflation expectations. That transmission lag is roughly six to ten weeks; the September FOMC will be the first meeting at which the energy-driven inflation channel could plausibly shift the SEP framing.

What oil prices do not tell you

1. The underlying activity print. Oil moves can come from supply or from demand. A demand-driven drop (recession scare) and a supply-driven drop (Iran de-escalation) carry opposite macro implications. The curve structure is the cleanest decomposition; backwardation in a falling spot suggests supply-side driver.
2. The sustainability. Geopolitical premia compress and re-expand on a months-not-years basis. A move from $93 to $73 is not a structural regime change; it is a premium reversal.
3. The downstream pricing pass-through. Gasoline prices are downstream of crude with a refining margin and transportation cost overlay. The transmission from Brent to retail gasoline takes 4 to 8 weeks.

Related reading

• Today's analysis applies this directly: Brent breaks $75. Bonds rally. Dollar still strong.
• The inflation-side companion: A plain-English guide to CPI components
• The dollar-Brent regime piece: A plain-English guide to currency correlations
• The framework that uses look-through: A plain-English guide to monetary policy frameworks