Oil prices dropped sharply on Tuesday as markets absorbed the escalating stand-off over Iran economic D-Day sanctions, with Brent crude falling 3% to $89.40 a barrel, its lowest point since 13 August, and US West Texas Intermediate sliding 3.2% to around $82.32 a barrel.
The falls extended a decline already under way on Monday, when Brent prices dropped by a further 3%. Despite the rhetoric from Washington and Tehran growing more confrontational by the day, investors appear to be looking past supply risks in the region for now.
Washington’s ‘greatest financial offensive ever’
The White House has been building towards this pressure campaign for several days. The US government unveiled a fresh wave of sanctions on Iran alongside what it described as the so-called ‘enablers’ that continue to trade with the country. Treasury Secretary Scott Bessent labelled the push ‘the single greatest financial offensive ever’ on Monday.
The scale of that offensive is substantial. According to CBS4Local, the Treasury Department sanctioned more than 60 entities, individuals and vessels accused of enabling Iran’s oil sales, cyber operations and access to weapons. The breadth of those targets signals an attempt to cut off multiple revenue streams simultaneously rather than focus on a single sector.
Bessent went further in his characterisation of the broader campaign. As reported by Euronews, he stated that US President Donald Trump’s military campaign had ‘significantly dismantled Iran’s military capabilities and weakened its nuclear programme’, framing the new economic measures as a continuation of pressure applied through both financial and military means.
US Defense Secretary Pete Hegseth reinforced that message on Monday, telling reporters that further American military strikes in the Middle East remained possible. ‘If we need to use kinetic strikes, we’ll use them,’ he said. ‘If Iran is foolish enough to overplay their hand or mess with the American military, we’ll do what we need to do.’ He added that economic pressure was the priority for now, but made clear the military option was not being ruled out: ‘By no means are we foreclosing using kinetic strikes anywhere in the Strait of Hormuz or around Iran.’
Iran economic D-Day sanctions met with defiance in Tehran
Iran’s response has been one of studied defiance. Iranian Economy Minister Ali Madanizadeh appeared on state television to insist that Tehran is ‘fully prepared’ to withstand further US pressure. ‘The government is and was ready and has a two-year plan to manage these events,’ he said. ‘We have our own tools and we know how to play the game.’
That kind of public messaging from a senior minister is designed to project stability at home as much as it is a response to Washington. Whether Tehran’s preparations will prove adequate under a sanctions regime of this breadth remains an open question that the oil market is, for now, choosing not to answer in Iran’s favour.
China pushes back on pressure to cut Iranian oil imports
The country with the most immediate economic stake in the new measures is China, one of Iran’s largest trading partners. Under the Iran economic D-Day sanctions framework, Beijing could face consequences for continuing to buy Iranian oil, a prospect that drew a sharp response on Tuesday.
Chinese Foreign Ministry Spokesperson Lin Jian told reporters that Beijing would ‘do everything necessary to firmly safeguard its rights and interests.’ He described the US approach as ‘economic warfare’ and said that ‘maximum pressure provides no solution,’ adding that China’s cooperation with Iran falls within the framework of international law and should not be disrupted.
China has consistently called for a diplomatic resolution to the US-Iran dispute. The new sanctions put that position under considerably more pressure, and Beijing’s language on Tuesday suggests it intends to push back rather than quietly comply.
The White House has not yet indicated how it plans to enforce compliance among third-party buyers, but Bessent’s description of this as the most significant financial offensive in US history suggests the administration is prepared to apply the label in full.
