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Markets & Finance20 Oct 2026 · about 6 min

Brent Tops $110 as Tanker Attacks Threaten Persian Gulf Supply

The brief

Brent crude rose above $110 as traders became less confident that oil shipments through the Persian Gulf would quickly return to normal. Tanker attacks made the physical supply route more dangerous. That raised fears of fewer barrels reaching global markets. Kpler reported that Iranian strikes had severely reduced exports through the Strait of Hormuz. Average daily oil flow fell to 8.5 million barrels, from more than 20 million barrels two weeks earlier. Reuters reported at least 18 tanker attacks during the latest two weeks. This uncertainty created a war premium. Buyers and traders priced in the possibility that disruptions could continue or worsen. ING analysts said oil remained well-supported despite relatively strong flows, showing that volatility itself was affecting prices. Brent reached $110 earlier in the day and later traded at $109.68, while WTI stood at $98.55.

01

Why did Brent crude rise above $110 per barrel as tanker attacks increased in the Strait of Hormuz?

Brent crude rose above $110 as traders became less confident that oil shipments through the Persian Gulf would quickly return to normal. Tanker attacks made the physical supply route more dangerous. That raised fears of fewer barrels reaching global markets.

Kpler reported that Iranian strikes had severely reduced exports through the Strait of Hormuz. Average daily oil flow fell to 8.5 million barrels, from more than 20 million barrels two weeks earlier. Reuters reported at least 18 tanker attacks during the latest two weeks.

This uncertainty created a war premium. Buyers and traders priced in the possibility that disruptions could continue or worsen. ING analysts said oil remained well-supported despite relatively strong flows, showing that volatility itself was affecting prices. Brent reached $110 earlier in the day and later traded at $109.68, while WTI stood at $98.55.

02

What are Brent crude and West Texas Intermediate, and why are they used as benchmark oil prices?

Brent crude and West Texas Intermediate, or WTI, are benchmark prices for different crude-oil markets. Brent generally represents oil traded around the North Sea and is widely used in international pricing. WTI represents a major U.S. crude market. The article reports both prices because they provide a quick view of changing oil values.

Benchmarks matter because crude oil differs by location, quality, and transportation cost. A commonly watched reference gives contracts, producers, refiners, and traders a shared starting point. Other grades can then be priced at a premium or discount to that reference.

The article shows how these measures communicate market stress. Brent reached its highest level in five months and traded at $109.68. WTI was $98.55. Their movements help reveal how geopolitical risks and expected supply disruptions are influencing global oil markets, even though the two prices are not identical.

03

How much did average oil flow out of the Persian Gulf fall, and how many tanker attacks were reported in the previous two weeks?

The reported fall was dramatic. Daily average oil flow out of the Persian Gulf dropped to 8.5 million barrels from more than 20 million barrels two weeks earlier. That reduction signaled that the region’s export system was no longer operating normally.

The disruption was linked to tanker attacks in the Strait of Hormuz. Kpler attributed the renewed damage to Iranian strikes on tankers in the waterway. Reuters, using Kpler data, reported at least 18 tanker attacks over the previous two weeks. These incidents affected the ships carrying oil, not only production sites.

The reduced flow and attack count mattered because markets react to threatened supply as well as confirmed shortages. Traders worried that continuing attacks could restrict exports further. Brent therefore rose above $110 earlier in the day, while analysts described prices as carrying a significant risk premium tied to the conflict’s volatility.

04

What is the Strait of Hormuz, and why is it so important to global oil shipments?

The Strait of Hormuz is a strategic waterway at the entrance to the Persian Gulf. It connects oil-exporting states inside the gulf with international shipping routes outside it. The article calls it the waterway through which Persian Gulf oil flows and reports that tanker attacks there severely affected exports.

Its importance comes from concentration. When many oil shipments use one passage, disruption in that passage can delay or stop deliveries even if producers still have oil available. Tanker attacks can also make crews, insurers, and companies less willing to operate normally. That raises shipping risk and market uncertainty.

The article reports that average oil flow fell to 8.5 million barrels daily from more than 20 million barrels. Reuters counted at least 18 attacks in two weeks. Those figures explain why traders feared a wider supply problem and pushed Brent above $110. The article does not identify specific replacement routes.

05

How do attacks on tankers create an additional 'war premium' in oil prices?

A war premium is the extra price traders attach to crude when conflict threatens supply. It reflects risk, not only barrels already lost. Buyers may pay more today because future deliveries could become slower, less reliable, or more expensive to transport.

In this case, attacks on tankers made the route through the Strait of Hormuz dangerous. Kpler reported that average oil flow had fallen to 8.5 million barrels daily from more than 20 million barrels two weeks earlier. Reuters reported at least 18 attacks in the previous two weeks. Those events gave traders evidence that disruption was real.

ING analysts said oil prices remained well-supported despite relatively strong Persian Gulf flows. They said this suggested a significant risk premium. If flows stayed stable and strong, the premium would gradually disappear. But the analysts saw no such sign, so continuing volatility and possible further attacks kept upward pressure on prices.

06

What alternative routes or transportation methods could oil producers use if tanker traffic through the Strait of Hormuz remained disrupted?

If tanker traffic through the Strait of Hormuz remained disrupted, oil producers could try routing more crude through pipelines to ports outside the affected passage. They could also use other export terminals, store oil temporarily, or send supplies by alternative maritime routes where geography allows. These options are established parts of global oil logistics, but the article does not name specific routes.

The key mechanism is substitution. A pipeline or different port can bypass the dangerous waterway, but available capacity may be limited. Longer routes can also require more ships, time, fuel, and insurance. Storage can smooth deliveries briefly, yet it cannot replace missing export capacity indefinitely.

The article gives no evidence that such alternatives could fully offset the disruption. It reports flows falling to 8.5 million barrels daily from more than 20 million. If the shortfall continued, traders would likely keep pricing in supply risk. That could sustain higher crude prices even if some exports were rerouted.

07

How do supply, demand, inventories, and expectations determine the price of crude oil in global markets?

Crude prices reflect the balance between available supply and expected demand. When buyers expect less oil, stronger consumption, or difficulty obtaining barrels, prices tend to rise. When supply is ample or demand weakens, prices tend to fall. Inventories cushion temporary disruptions, because stored oil can reach markets when production or shipping is interrupted.

Expectations can move prices quickly. The article reports that Persian Gulf flows fell to 8.5 million barrels daily from more than 20 million. Tanker attacks made traders question whether exports would recover. Even if some oil still moved, the possibility of worse disruption encouraged buyers to pay more for reliable future supply.

The current case shows expectations and risk working together. Brent topped $110, and ING analysts identified a significant war premium. If flows remained stable and strong, that premium would gradually vanish. But continued attacks, reduced exports, or falling inventories could keep prices elevated. The article does not provide inventory figures or demand estimates.

This brief was written by AI from the original reporting and checked by other models. Names, figures and quotes come from the source; read it for full context.

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