What happened
The cost of moving goods around the world has hit a record high. A combination of geopolitical conflict and climate driven disruption has pushed freight rates to levels never previously recorded, and economists are warning it will feed into consumer prices.
Two chokepoints are doing most of the damage. Tanker traffic through the Strait of Hormuz, the narrow waterway at the mouth of the Gulf through which a large share of the seaborne oil and gas in the world passes, slowed to a trickle over the weekend. Brent crude, the global oil benchmark, was trading at 88.62 dollars a barrel, with West Texas Intermediate at 82.18 dollars.
At the other end of the world, drought has cut the number of vessels the Panama Canal can handle. The canal relies on fresh water from an inland lake to raise and lower ships through its locks, and when rainfall falls short the operator has to reduce daily crossings, forcing ships to queue or take far longer routes.
The disruption is showing up in refining as well as transport. S&P estimates that refineries worldwide processed 7.5 million barrels per day less crude last month than in the same period of 2025, and separate International Energy Agency analysis tracks a similarly steep drop. Diesel supply is tightening globally, and carmakers including Volkswagen, Stellantis and Toyota have been forced to reformulate engine oils after running out of high quality base oils previously sourced from the Middle East.
Why it matters
Freight is one of the most reliable early warning signals for inflation. It sits at the front of nearly every supply chain, and because contracts are renegotiated frequently, a jump in shipping costs works its way into retail prices within roughly three to nine months rather than years.
The UK is unusually exposed. Britain imports around half of its food and the overwhelming majority of its consumer electronics, clothing and vehicles. Every one of those categories travels by sea, and every one absorbs a share of a record freight bill.
Diesel is the sharper problem. It powers lorries, trains, tractors and generators, so a diesel shortage raises the cost of moving everything, not just the cost of driving. That is a cost increase which spreads across the whole price level rather than sitting in one category.
This is also why the Bank of England is in an uncomfortable position. Its central forecast has UK inflation reaching 3.2 percent by October, driven largely by energy, and markets now price an almost one in four chance of a rate increase in September. Freight and energy costs of this kind are a supply shock, and interest rates are a poor tool against them.
Explained simply
The world economy runs through a handful of narrow doorways. Two of them are now half closed, one by war and one by a lack of rain, and everything queuing behind them costs more to move.
Global trade is far less spread out than it looks on a map. An enormous share of it funnels through a small number of straits and canals, because those routes are dramatically shorter than the alternatives. When one narrows, there is no quick substitute.
The Strait of Hormuz is the first doorway. It is roughly twenty miles wide at its narrowest, and a very large proportion of global oil and liquefied natural gas exports pass through it. Tankers are not stopping entirely, but they are moving slowly, insurance premiums have climbed, and fewer captains are willing to make the crossing. Fewer voyages means less oil arriving, which means a higher price.
The Panama Canal is the second. Unlike a sea level channel, it lifts ships up over the isthmus using fresh water from Lake Gatun, and each crossing consumes a large volume of it. Drought means less water, which means fewer crossings per day. Ships either wait for a slot, bid for one, or sail around South America and add weeks to the journey.
Both outcomes end at the same place. A journey that costs more or takes longer raises the landed cost of the goods on board, and the retailer either accepts a thinner margin or raises the shelf price. Over time, most raise the price.
What it means for you
Fuel is the fastest transmission channel. Petrol and diesel pump prices in the UK typically follow crude oil moves within two to four weeks. With Brent near 89 dollars, forecourt prices are more likely to rise than fall over the next month, and diesel drivers should expect the gap over petrol to widen given the specific shortage.
Food is the next channel. Imported fresh produce, coffee, cocoa and rice all carry freight costs directly, and grocery inflation has historically tracked shipping and energy costs with a lag of several months. Own brand ranges tend to absorb increases more slowly than branded goods.
On energy bills, the same gas prices driving freight and refining costs are what will set the Ofgem price cap changing on 1 October. The removal of 5 percent VAT on domestic electricity from that date offsets part of the increase, though it does not apply to gas.
For savers and investors, this is an environment where inflation linked assets and shorter dated bonds behave better than long dated ones. If you hold cash, note that an easy access account paying around 4 percent still beats inflation forecast at 3.2 percent, but the margin is narrowing. Anyone holding a large cash balance in a current account paying nothing is losing real value every month.
The bigger picture
The last comparable freight shock, during the pandemic, showed how the pattern plays out. Container rates spiked, retailers absorbed the increase for a quarter or two, then passed it on, and consumer inflation followed roughly six to nine months later. Rates eventually normalised, but the price increases did not reverse.
The difference this time is that two independent disruptions are running at once, one geopolitical and one climatic, and neither has an obvious end date. Europe adds a third pressure point, with gas storage at the lowest level in seventeen years less than three months before heating season begins.
What to watch is tanker traffic through Hormuz and Panama Canal transit slots. Both are published frequently, and both will turn before shop prices do.
