Iran has vowed to retaliate against a new wave of U.S. sanctions designed to squeeze its economy, deepening an already dangerous confrontation in which Washington is relying increasingly on financial pressure while Tehran threatens to strike back against American interests and the global energy system.
The latest measures, announced by U.S. Treasury Secretary Scott Bessent on Monday, stop short of the most severe penalties Washington had threatened. Nevertheless, the administration warned countries and companies that continue doing business with Iran that they could eventually be pushed out of the dollar-based financial system.
The Treasury Department sanctioned 60 individuals, entities and vessels, but notably did not include Chinese financial institutions suspected of facilitating Iran’s oil trade. That omission highlights one of the central constraints facing Washington: the United States is attempting to isolate Iran without triggering a wider confrontation with China or destabilising the global financial system.
Bessent himself acknowledged the dilemma, asking why Washington would want to “blow up the global financial system” by moving too aggressively.
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Iran signals a broader retaliation
Tehran responded to the sanctions with defiance rather than concessions.
Iranian Economy Minister Ali Madanizadeh said the country was fully prepared for the new measures and warned that Tehran had its own economic tools with which to respond.
The message from Iran’s security establishment was even more direct. Brigadier General Hossein Mohebbi, a spokesperson for Iran’s Islamic Revolutionary Guard Corps, warned of heavy strikes against U.S. interests and energy chokepoints if Iranian infrastructure is threatened.
The warnings matter because Iran’s ability to retaliate extends beyond conventional military targets.
The country retains missile and drone capabilities capable of threatening Gulf states and commercial shipping. The Strait of Hormuz remains particularly vulnerable, and Tehran has previously threatened to restrict oil exports through the waterway if economic pressure escalates.
That creates a dangerous connection between financial sanctions and global energy security.
A sanctions campaign designed to reduce Iran’s economic capacity could therefore produce the opposite short-term effect in global energy markets if Tehran responds by disrupting shipping or further restricting oil exports.
Diplomacy remains stalled
The sanctions come despite months of diplomatic efforts to end the conflict.
Iran and the United States reached an interim agreement in June, known as the Islamabad memorandum, but the arrangement quickly deteriorated.
Pakistan has continued attempting to mediate between Washington and Tehran. In the latest talks, Pakistani officials said they had made significant progress on measures intended to prevent further escalation and reopen the Strait of Hormuz.
Pakistan’s role is increasingly important because it maintains relationships with both Washington and Tehran while seeking to prevent the conflict from spreading across the wider region.
Yet the diplomatic track remains fragile.
The absence of major U.S. or Iranian strikes in recent weeks has created a temporary reduction in direct military escalation, but there is little evidence of a durable political settlement.
Instead, economic pressure is intensifying while Iran’s ability to threaten regional energy infrastructure remains intact.
Hormuz becomes the pressure point
The Strait of Hormuz illustrates the stakes particularly clearly.
Before the war, approximately one-fifth of global crude oil and liquefied natural gas flows passed through the waterway.
On Monday, only two commodity vessels transited the strait, the lowest daily figure since early May.
The decline demonstrates how military and political uncertainty can effectively restrict energy supplies even without a complete physical closure of the waterway.
For global markets, the problem is not simply whether ships can technically pass through Hormuz. It is whether commercial operators are willing to accept the risks involved.
Higher insurance costs, security concerns, potential attacks and uncertainty about future sanctions can all discourage shipping companies from operating in the area.
That can reduce effective supply without a single barrel being physically destroyed.
Washington’s sanctions strategy faces a major test
The Trump administration is betting that economic pressure can force Tehran to change course.
But Iran has lived under extensive U.S. and international sanctions for decades.
Those sanctions have severely weakened the Iranian economy, contributed to inflation and constrained access to international finance, yet they have not persuaded the Iranian leadership to abandon its core security and foreign-policy objectives.
That raises a fundamental question about the latest strategy: how much additional economic pressure can Washington impose before the costs begin to outweigh the benefits?
The answer is particularly complicated because Iran is no longer operating in isolation.
China remains the most important buyer of Iranian oil, while Russia has maintained close relations with Tehran.
The United States therefore has to pressure Iran while calculating the potential response from two major powers.
China is the biggest complication
The absence of Chinese financial institutions from the latest sanctions list is perhaps the clearest indication of Washington’s dilemma.
China has been the largest buyer of Iranian oil for years, providing Tehran with a crucial source of revenue despite U.S. sanctions.
Washington has already urged Beijing to cooperate with its efforts to restrict Iranian oil flows.
But aggressively targeting Chinese banks could provoke retaliation from Beijing at a time when Trump is preparing for talks with Chinese President Xi Jinping.
The issue is particularly sensitive because the broader U.S.-China relationship already includes disputes over tariffs, critical minerals, technology and trade.
Washington therefore faces a difficult balancing act.
It wants to make sanctions credible enough to force countries to distance themselves from Iran, but it does not want to trigger a financial confrontation with China that could destabilise global markets.
Oil markets remain highly sensitive
The economic confrontation is already affecting energy markets.
Iranian oil exports have declined under the U.S. blockade, while uncertainty around Hormuz has kept traders focused on the possibility of additional supply disruptions.
Oil prices stabilised on Tuesday after falling sharply the previous day, but the underlying risks remain.
Any Iranian decision to significantly restrict Gulf oil exports could quickly push prices higher.
That would create a particularly difficult political problem for Trump. Higher fuel prices would increase inflationary pressure on American households and businesses while undermining an administration that has repeatedly emphasised the importance of affordable energy.
The same dynamic applies internationally.
Europe and Asian economies remain exposed to Middle Eastern energy flows, while China is particularly vulnerable because of its dependence on imported crude.
The risk of economic warfare becoming physical warfare
The most serious danger is that financial pressure and military escalation become mutually reinforcing.
Washington imposes sanctions to weaken Iran.
Iran retaliates economically or militarily.
The United States responds with additional sanctions or military measures.
Iran then targets energy infrastructure or shipping.
Such a cycle could gradually transform an economic confrontation into a wider regional conflict.
The Strait of Hormuz is the obvious flashpoint, but the risks extend into the Red Sea, Gulf states and international shipping.
Iran’s threats to retaliate against energy chokepoints therefore have implications far beyond the U.S.-Iran relationship.
A narrow path to de-escalation
Pakistan’s mediation efforts offer one possible route away from escalation, particularly because the immediate objectives under discussion include preventing further conflict and reopening Hormuz.
But diplomacy faces a difficult environment.
Washington wants Iran to accept significant constraints while demonstrating that sanctions remain credible. Tehran wants sanctions relief and guarantees against further attacks while preserving its strategic capabilities.
Neither side appears ready to make the concessions required for a comprehensive settlement.
That leaves the conflict in an unstable middle ground: direct attacks have declined, but economic pressure is intensifying and the threat of renewed military escalation remains.
What happens next?
The next stage of the crisis will depend heavily on how Washington implements its sanctions and how far other countries are willing to comply.
If major trading partners, particularly China, resist U.S. pressure, Washington could face a choice between accepting reduced sanctions effectiveness or escalating against those countries.
If Tehran instead chooses to retaliate against shipping or energy infrastructure, the economic consequences could spread rapidly through global oil markets.
The latest measures therefore represent more than another round of sanctions.
They are a test of whether Washington can economically isolate Iran without provoking a wider confrontation with its trading partners, destabilising energy markets or pushing Tehran toward military retaliation.
For now, the diplomatic window remains open through Pakistan’s mediation. But with Hormuz operating at exceptionally low levels and both Washington and Tehran publicly preparing for further confrontation, the space for miscalculation is becoming increasingly narrow.
With information from Reuters.
