US Threatens to Seize Iranian Oil: What It Means for Global Markets

US President Donald Trump has stated that his 'preference would be to take the oil' in Iran, sparking concerns about the potential for a US invasion or occupation of the country. Iran is one of the world's biggest oil producers, holding around 24 percent of the Middle East's and 12 percent of the world's proven oil reserves, with about 157 billion barrels of proven crude oil.

The Trump administration has threatened to target Iran's energy infrastructure, including oil wells, if Tehran does not reopen the Strait of Hormuz, which has been under a de facto Iranian blockade for weeks, triggering a global energy crisis. The US has also unveiled plans to prepare for limited ground operations in Iran, potentially including raids on Kharg Island and coastal sites near the Strait of Hormuz.

Seizing Iranian oil would not be easy, as the US would have to occupy Iran's oil production sites and refineries, essentially occupying mainland Iran. However, if the US were to lift sanctions on Iranian oil after seizing it, it could lead to a flow of more Iranian oil into global markets, bringing down oil prices.

The US-Israeli war on Iran has already sent global oil prices soaring, with benchmark Brent crude rising to more than 3 percent on Monday to $116 a barrel – the highest level in nearly two weeks. The oil price was about $65 per barrel before the war.

In 2023, Iran's gross domestic product (GDP) was around $457.5bn, according to World Bank data. Iran's net oil export revenues were estimated at $53bn, equivalent to roughly 12 percent of Iran's GDP.

This is not the first time the US has shown an interest in Iranian oil. In 1953, the government of Mohammad Mossadegh, Iran's first democratically elected prime minister, was toppled in a CIA-orchestrated coup after he nationalised the British-controlled firm Anglo-Iranian Oil Company (AIOC), the predecessor of modern-day BP.