What happened
Brent crude oil has jumped more than 30 percent this month, the sharpest monthly move in years, as fighting between the United States and Iran escalates around the vital Strait of Hormuz. Brent slipped back below 98 dollars a barrel on Friday but still ended the week up more than 12 percent as traders weighed the risk of a supply shock.
The trigger has been a sustained US military campaign against Iran, now stretching to a thirteenth consecutive night of strikes on military and maritime targets. Iran aligned Houthi forces in Yemen said they had attacked two Saudi oil tankers with drones and missiles, deepening fears that shipping through the region could be disrupted.
The Strait of Hormuz is the single most important choke point in the global oil trade, with a large share of the worlds seaborne crude passing through it. Any threat to that passage sends prices sharply higher because buyers scramble to secure supply before it becomes scarce.
Why it matters
Oil is the lifeblood of the global economy. It powers cars, lorries, ships and planes, and it is a raw material in everything from plastics to fertiliser. When the oil price jumps, the extra cost seeps into almost every corner of daily life, from the petrol pump to the supermarket shelf.
This spike is especially awkward because it lands just as central banks thought inflation was coming under control. Higher energy costs feed straight into headline inflation, which is exactly why the European Central Bank has already started raising rates again and why the Federal Reserve and Bank of England are watching nervously.
For businesses, dearer oil raises transport and manufacturing costs, squeezing profit margins. For households, it means higher bills at a time when many budgets are already stretched.
Explained simply
Imagine the world economy runs on a single giant tap of oil, and most of the water flows through one narrow pipe. When someone threatens to block that pipe, everyone rushes to fill their buckets at once, and the price of every drop shoots up.
Oil prices are set by the balance of supply and demand, but they are extremely sensitive to fear. Even if not a single barrel has actually stopped flowing, the mere risk that the Strait of Hormuz could close is enough to send traders bidding prices higher.
That is because oil is difficult to replace quickly. If the pipe narrows, there is no easy substitute waiting in the wings, so buyers compete fiercely for whatever supply is available. Prices rise until demand cools or the threat fades.
The reverse is also true. Brent dipped below 98 dollars on Friday precisely because traders sensed a slight easing of tension. In a market this jumpy, prices can swing violently on a single headline.
What it means for you
The most direct hit is at the petrol station. A sustained rise in crude typically feeds through to pump prices within a couple of weeks, so UK drivers should expect diesel and unleaded to climb if oil stays high. A 30 percent jump in crude can add several pence per litre at the pump.
Home energy is next. Wholesale gas prices often move with oil, and the UK energy price cap is adjusted every three months, so a prolonged spike could feed into higher bills later in the year. It is a sensible moment to check whether a fixed energy deal might protect you.
Investors feel it too. Oil majors such as those in the FTSE 100 tend to benefit from higher crude, which can support share prices and dividends. But airlines, hauliers and other heavy fuel users face rising costs, which can drag their shares lower.
The bigger picture
Oil has a long history of triggering economic pain when conflict flares. Analysts warn that if the fighting escalates into a full regional war, Brent could test its 2022 high of around 128 dollars, or in a worst case even approach the 2008 record near 146 dollars.
The key variable is the Strait of Hormuz. As long as it stays open, prices may settle back down. If it were to close, even briefly, the shock to global energy markets would be severe. Watch the headlines from the Gulf, because for now they are steering the oil price more than any economic data.
