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If oil stays above $100: what follows

Brent crude averaged more than $100 a barrel in March, April, September and October 2026, as war around the Strait of Hormuz disrupted supply. Nobody knows how long that will last. What is known is how a lasting oil shock travels through an economy, and in what order. This page follows it step by step. It explains cause and effect; it does not predict the price of oil.

1 · Where we are

Oil is already high, and inflation has followed

$107.03Brent, a barrel, 3 Nov
3.70%US inflation, Sep 2026
3.80%Euro area inflation, Sep 2026
3.50%UK inflation, Sep 2026
6080100120140107.03Nov 23May 25Nov 26
Brent crude, $ per barrel, month-end values. Latest: 107.03 (3 Nov 2026). Source: EIA (via FRED).
2 · The chain

From the oil field to your budget, in five steps

The longer oil stays high, the further down this chain the effects travel.

  1. WeeksFuel prices riseA barrel holds 42 US gallons (159 litres), so every $10 on a barrel adds about 24 US cents a gallon, or 6 cents a litre, to the cost of the crude in fuel, before taxes and margins.
  2. MonthsInflation rises, directly then indirectlyEnergy bills push up inflation at once. Then transport, plastics, fertiliser and food follow as firms pass on costs. ECB staff estimate that a 10% rise in energy prices adds about 0.2 percentage points to euro area inflation directly over three years, and 0.4 to 1.5 points more through these indirect effects, depending on how global the shock is.
  3. MonthsCentral banks decide whether to reactA one-off jump in fuel prices fades from inflation after a year. What central banks fear is "second-round effects": workers demanding higher pay and firms raising prices because they expect inflation to last. That fear is why the Bank of England, the Reserve Bank of Australia and Sweden's Riksbank raised rates in late October and early November.
  4. QuartersGrowth slowsMoney spent on fuel is not spent on anything else, and higher rates add to the squeeze. The ECB estimates that a 10% rise in the real price of oil from a supply shock lowers euro area growth by about 0.2 to 0.3 percentage points in each of the first three years.
  5. A year +Supply and demand respondHigh prices make new drilling profitable, and US shale producers can add supply within months. Consumers and firms use less. Over time this pulls prices down: the old saying is that the cure for high prices is high prices.
Brent crude
The main global benchmark price for oil, based on crude from the North Sea. It is quoted in US dollars per barrel. The US benchmark is called WTI (West Texas Intermediate).
Example: Brent settled at $116.72 a barrel on 23 October 2026, up about 76% in a year.
Supply shock
A sudden change in the supply of something important, such as oil, that moves prices without any change in demand. A negative supply shock raises prices and slows growth at the same time, which leaves central banks with a dilemma.
Example: The near-closure of the Strait of Hormuz in 2026 cut oil supplies to Asia and Europe.
Imported inflation
Inflation that comes from abroad: higher prices for imported goods and energy, or a weaker currency that makes every import more expensive.
Example: Japan buys oil in dollars. With the yen near 157 per dollar, each barrel costs more in yen than it did when the yen was stronger.
Risk premium
The extra price or return investors demand because something might go wrong, such as a supply cut, a default or a war. It is not published; it shows up when prices move on news that changes no physical flow.
Example: Brent crude fell 7.6% to $104.77 on 2 November 2026 after Iran signalled openness to peace talks, though no extra oil had arrived: traders said the risk premium was "seeping out".
Stagflation
High inflation and weak growth or rising unemployment at the same time. It is hard to treat, because raising rates to fight inflation also weakens the economy further.
Example: In the US, inflation reached 12.2% in November 1974 and unemployment 9.0% in May 1975, after the first oil shock.
Backwardation
When oil for delivery soon costs more than oil for delivery later, so the futures curve slopes down. It signals a shortage now: buyers pay extra to get barrels today, and nobody wants to store oil. The opposite, when later delivery costs more (to cover storage), is called contango.
Example: On 26 October 2026 the nearest Brent contract cost about $5 a barrel more than the next one, up from $3.69 a week earlier, even as the Brent price fell.
3 · Winners and losers

An oil shock moves money from importers to exporters

Oil importers
Japan, Korea, India, the euro area

They pay more abroad for every barrel, which worsens their trade balance, weighs on their currencies and squeezes household incomes. Some governments cushion the blow with fuel subsidies or price caps, as Korea has, at a cost to their budgets.

Oil exporters
Gulf producers, Norway, Canada

Export revenue and government income rise, and their currencies tend to strengthen. The US is now a net exporter of petroleum, so the shock hurts its consumers but helps its producers, which softens the overall hit compared with the 1970s.

Borrowers
Higher inflation → higher rates

If central banks respond with rate rises, borrowers on variable rates and those refinancing pay more. See how a rate rise reaches your wallet.

Bondholders
Higher inflation → higher yields → lower prices

Inflation erodes fixed payments, so investors demand higher yields, and existing bonds lose value. See why bond prices fall when yields rise.

Companies
Energy producers gain, energy users lose

Airlines, chemicals and transport firms face higher costs; oil producers and their suppliers earn more. Share prices tend to reflect that split.

What would change the path

  • Progress in talks over Iran and the Strait of Hormuz, which would shrink the "risk premium" traders pay for fear of losing supply.
  • Decisions by OPEC+ on how much oil its members pump.
  • A slowdown deep enough to cut demand for oil.
  • Releases of emergency oil stocks by governments.

What makes today different from the 1970s

Rich economies use far less oil for each unit of output than they did fifty years ago, central banks target inflation and act earlier, and the US produces more oil than any other country. All three make a repeat of 1970s inflation less likely, though not impossible: the key is whether expectations stay anchored. See what markets are pricing.

5 · Last time

What happened in the 1970s

Oil quadrupled in 1973–74 and more than doubled again in 1979–80. Inflation reached double digits, growth stalled, and it took Paul Volcker's rate rises to break the cycle. The 1970s oil shocks and the Volcker squeeze tell the story, including what happened to shares, bonds and gold.

In the news

Where this is at work now

Recent stories, newest first.

Link 4 · EnergyCause Oil drops below $90 for the first time since August as war fears ease Brent fell almost 6% on 9 November and dipped below $90 on 10 November for the first time since August, closing about 2% lower at $90.69. Shipments through Hormuz averaged 7.82 million barrels a day in the week to 8 November, about 46% of the prewar level, according to Kpler. Brent crude briefly fell below $90 a barrel on 10 November, after an almost 6% drop the day before, when President Trump said further strikes on Iran did not seem necessary. Yet less than half the usual oil is moving through the Strait of Hormuz. The gap between those two facts is the war premium draining out of the price. 11 Nov 2026 · Global Link 4 · EnergyEffect Oil is near $100, so why is Saudi Arabia running a deficit? Saudi Arabia's budget deficit reached SAR84bn ($22.4bn) in the third quarter, 2.4 times the second quarter's. Oil revenue fell 23% on the year to SAR116.5bn, as the Iran war disrupted exports, even though Brent averaged about $101 a barrel. An oil shock is supposed to make oil exporters rich. Saudi Arabia's budget shows it is not that simple: in July–September, with Brent around $100 a barrel, its oil revenue fell 23% from a year earlier and the government ran a deficit of 84 billion riyals. Price is only half the sum. 10 Nov 2026 · Emerging markets · Saudi Arabia External shock → Link 1In the chain A tense weekend around Hormuz: tanker fires, a wider US blockade Iran's Revolutionary Guards said three tankers caught fire on 8 November after using routes it calls illegal; a tanker fire off Oman was also reported. The US extended its blockade campaign to Iran's land borders and the Caspian Sea. Brent ended last week near $100. Over the weekend, Iran said tankers hit mines in the Strait of Hormuz, the US widened its blockade of Iran to land routes, and Tehran lifted its own limits on missile ranges. Oil markets reopen this week after Brent's 12% weekly fall on hopes of a deal. Why this kind of news moves prices so much. 9 Nov 2026 · Global Link 5 · Real economyEffect Europe's shoppers pull back: retail sales fell 0.7% in September Retail sales volumes fell 0.7% on the month, against a forecast of −0.1%, and rose only 0.4% on the year. Non-food sales fell 1.2% and food 0.3%; spending on fuel rose 1.0%. Germany fell 2.0%, France 0.6% and Spain 0.4%. Euro-area retail sales fell 0.7% in September, far more than expected, led by a 2% drop in Germany. Spending on non-food goods fell 1.2%. With inflation at 4%, higher energy bills leave households less to spend on everything else. 8 Nov 2026 · Europe · Euro area · Germany External shock → Link 1In the chain China is running short of copper, even with weak demand. Here's why The Shanghai spot copper premium averaged a record 2,615 yuan a tonne on 6 November, up 515 yuan in a day, SMM said. The gap between November and December futures widened to about 2,000 yuan, and SHFE warehouse warrants fell to 4,327 tonnes. The price Chinese buyers pay above futures for copper they can collect now hit a record on 6 November. Smelters are short of ore and scrap, and much of the world's metal has been shipped to the US ahead of possible tariffs. A shortage can come from supply alone. 8 Nov 2026 · China · Global External shock → Link 1In the chain Oil had its worst week in months. Why it bounced back towards $100 Brent dropped to about $93.5 on 4 November, its lowest settlement in more than two months, then rose back to $98.29 on Thursday and near $100 on Friday after Iran reported three more tanker attacks. Brent crude was heading for a fall of about 12% this week, after bets on a US–Iran deal sent it down more than 8% on Wednesday. Then new attacks on tankers in the Strait of Hormuz pulled it back towards $100. Hopes move prices fast; physical shipping changes slowly. 7 Nov 2026 · Global
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Sources and notes

  • Brent and inflation figures: the site's daily data feed (EIA via FRED for Brent; BLS, Eurostat and ONS for inflation). Monthly Brent averages above $100: March ($126.69), April ($124.24), September ($115.91) and October ($120.15) 2026.
  • ECB estimates: Philip R. Lane, member of the ECB Executive Board, "Analytical perspectives on energy supply shocks", 13 May 2026. The inflation estimates are cumulative over three years from ECB staff simulations of a 10% rise in EU energy prices.
  • Fuel arithmetic: our calculation (1 barrel = 42 US gallons = 159 litres).
  • This is an explanation of cause and effect, not a forecast or investment advice.
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