Trump’s ‘Economic D-Day’ Against Iran: What It Means for China, Hormuz and Oil Prices

The US-Iran war is entering a new battlefield.

Donald Trump has announced an “Economic D-Day” against Tehran, promising unprecedented isolation and warning that any country, company or financial institution helping Iran could face severe consequences.

US Treasury Secretary Scott Bessent says Washington will unveil the “toughest sanctions in history”, pressure China to reduce its dealings with Iran and attempt to “collapse” the Iranian government without immediately restarting large-scale military action.

Iran has responded by calling the proposed measures “economic terrorism” and another form of war. China says pressure will not solve the crisis. Oil prices have climbed, while the Strait of Hormuz continues to operate far below normal capacity. US Vice President JD Vance has described the strategy as a “delicate dance”. Economic pressure may hurt Iran, but Tehran retains the ability to retaliate through oil supplies, shipping and energy prices felt far beyond West Asia. So, what exactly is Trump planning, why does Washington need China and can an economic offensive succeed where months of military pressure and negotiations have failed?

WHAT HAS TRUMP ANNOUNCED AGAINST IRAN?

Trump has promised what he called the “most crushing economic operation ever taken against any country”. “No one has given the Islamic Republic of Iran a greater opportunity to make a deal than me,” Trump wrote on Truth Social. “Tragically, for them, they have failed to take it.” The campaign is intended to choke the channels through which Iran earns money, moves funds and continues trading despite decades of American restrictions.

Trump specifically named oil-smuggling networks, swap lines, cash transfers, exchange houses, ship registries and front companies. The announcement suggests Washington will go after the entire ecosystem supporting Iranian trade rather than confine its measures to entities operating directly inside Iran.

The most consequential threat was directed beyond Tehran. Trump warned that any country allowing its banks, businesses, airports or government institutions to provide Iran with an economic lifeline could face “tremendous economic consequences”. That raises the possibility of secondary sanctions: penalties imposed on non-American entities for continuing to transact with a country targeted by the US. The full package has not yet been disclosed. Bessent is expected to set out the details on August 24.

WHY IS AMERICA SWITCHING TO ECONOMIC WARFARE NOW?

Washington wants to increase pressure without immediately launching another large military campaign. Bessent told CNBC that “maximum economic pressure” would likely mean avoiding a “kinetic restart”, according to Al Jazeera. His argument is that crippling Iran’s access to revenue could limit its ability to fund its military, nuclear programme and regional allies while forcing it towards a deal.

Vance described this as a new phase. “The most effective tool that we have is the economic pressure we can apply to them,” he said during an interview on the Clay Travis and Buck Sexton Show. The military campaign may have damaged Iranian facilities, but the US now wants to prevent Tehran from rebuilding. “What we are trying to do is create a changed reality on the ground, where not just we can say with confidence their facilities have been destroyed; we can also say with confidence they’re never going to try to rebuild,” Vance said.

The shift also reflects the limits of force. Nearly six months of conflict have failed to produce a permanent settlement. Two ceasefire efforts have faltered, negotiations have stalled and disruption around the Strait of Hormuz continues to pressure global energy markets. Economic warfare offers Washington another route to impose pain while reducing the immediate risks and costs of fresh strikes. It does not remove those risks. It moves them.

WHY DID VANCE CALL IT A ‘DELICATE DANCE’?

Because Iran can export economic pain even while its own economy suffers more. “This is a delicate dance, because we apply economic pressure to them, they’re going to try to apply economic pressure to us,” Vance said. Iran’s most powerful lever is the Strait of Hormuz, one of the world’s most important energy corridors. By attacking commercial vessels, restricting transit or keeping shipping risks elevated, Tehran can reduce oil flows, increase insurance costs and push up global crude prices.

Those increases eventually reach consumers. “Obviously oil prices are elevated, which people see at the pump,” Vance acknowledged. The US is attempting to move enough oil and gas through Hormuz to ease the pressure on energy prices while continuing to punish Iran over attacks on commercial shipping. Washington believes Iran is feeling substantially greater economic pain than the US. But the strategy has an inbuilt contradiction: the harder America squeezes Tehran, the stronger Iran’s incentive may become to disrupt the energy route that allows it to spread some of that pain around the world.

Economic pressure is therefore not a clean substitute for war. It is another contest over who can absorb the damage longer.

HOW DOES THE STRAIT OF HORMUZ FIT INTO THE SANCTIONS PLAN?

Hormuz sits at the centre of both the military and economic confrontation. Trump says the strait is open and that the US naval blockade has been “100 per cent successful”. Iran insists the waterway will not fully reopen until Washington honours its commitments under a 14-point agreement. Those commitments, according to Iranian officials, include lifting the blockade, releasing frozen assets, easing oil sanctions and ending military threats and operations.

The physical movement of ships remains far below normal levels. Reuters reported that only nine commodity vessels crossed the strait on each of two recent days, according to Kpler tracking data. Some ships may have travelled with their transponders switched off, but the visible traffic still showed a severely constrained energy corridor.

Bessent argues that stronger sanctions can force Iran to accept terms that restore normal shipping. Vance believes punishing Tehran for attacks on commercial vessels will change its calculation about a deal. Iran sees the sequence differently. Tehran says America must first fulfil the agreement before the strait can return to normal. The US wants economic pressure to reopen Hormuz. Iran is using Hormuz to demand economic relief.

WHY IS WASHINGTON PRESSURING CHINA?

Because China is the most important external buyer of Iranian oil and one of the few powers capable of weakening Washington’s strategy. China reportedly buys more than 80 per cent of Iran’s exported oil. Chinese demand allows Tehran to keep earning revenue despite American sanctions, often through intermediaries, reflagged vessels, opaque shipping arrangements and payments designed to bypass the dollar-based financial system.

Bessent urged Beijing to “get with the programme” and support the American effort to reopen Hormuz. “Keep in mind that the Chinese get 50 per cent of their energy from inside the Gulf,” he said. “So it would do them a big service to get with the programme.” The argument is that China’s need for stable Gulf energy supplies should outweigh the advantages it gains from buying Iranian crude.

Beijing has rejected that logic. A spokesperson for the Chinese embassy said sanctions and pressure would not resolve the conflict and called for diplomatic efforts instead, according to Reuters. Washington must now decide how aggressively it is willing to target Chinese companies, banks or shipping networks. Heavy secondary sanctions could deepen the pressure on Iran, but they could also trigger retaliation from the world’s second-largest economy and expand the confrontation far beyond West Asia.

COULD OTHER COUNTRIES ALSO BE PUNISHED?

Trump’s warning was deliberately broad. Any country permitting its financial institutions, businesses, airports or government entities to support Iran could potentially face American penalties. That could affect oil buyers, shipping registries, insurers, payment intermediaries, currency exchanges and companies involved in moving Iranian goods.

Countries maintaining economic or logistical links with Iran may be forced to choose between access to the American financial system and continued dealings with Tehran. Bessent framed that choice starkly. Reuters reported that the Treasury secretary told allies they would have to support Washington’s effort to isolate Iran or risk consequences. But implementing such a sweeping regime will be complicated. Iranian oil and money move through layered networks that include front companies, ship-to-ship transfers, intermediaries and jurisdictions with different levels of cooperation with the US. The broader Washington makes the campaign, the greater the enforcement challenge and the higher the risk of friction with partners that do not share Trump’s approach.

WHAT DOES THE US WANT THE SANCTIONS TO ACHIEVE?

Different members of the Trump administration have described the endgame in different terms. Vance framed the objective around preventing Iran from rebuilding its nuclear capabilities and changing Tehran’s calculation about a deal. Bessent went considerably further, saying Washington would seek to “collapse this regime”.

Trump has spoken of isolating and defeating the “Iran threat” while repeating that Tehran will never be allowed to acquire a nuclear weapon. These goals are not identical. Preventing nuclear reconstruction could theoretically be achieved through monitoring, inspections, restrictions and an agreement. Forcing a deal would require enough pressure to make Tehran compromise. Collapsing the Iranian government suggests regime change, an objective that could make negotiations almost impossible because Iran’s leaders would see surrender as an existential threat. The ambiguity may be intentional, allowing Washington to threaten maximum consequences while retaining room for a negotiated settlement. It may also complicate the strategy. A government that believes the real American objective is its destruction has little reason to trust promises of sanctions relief.

HOW HAS IRAN RESPONDED?

Iran has described the new economic campaign as both unlawful and indistinguishable from military aggression. “Economic sanctions and pressure are the other side of the same coin as war and military aggression,” the Iranian Foreign Ministry said. In an official statement, the ministry called the proposed measures “economic terrorism” and “crimes against humanity”, arguing that they would target the basic rights and daily lives of Iranian citizens. The statement accused Washington of continuing decades of hostility and maintained that repeated sanctions would produce only another American failure. Tehran said it would use its domestic capabilities and every available instrument to defend its security and national interests.

Iranian Foreign Minister Abbas Araghchi also attempted to turn the economic argument against Trump. “The so-called ‘Economic D-Day’ is a diversion from America’s own crisis: unprecedented debt and surging interest costs,” Araghchi wrote on X. He warned that renewed economic pressure would deepen Iranian hostility towards the US and threaten global economic stability. The response seeks to portray Iran as resistant rather than vulnerable. But decades of sanctions have already contributed to inflation, currency weakness, restricted investment and deep pressure on ordinary Iranians. A campaign that successfully closes more oil and financial channels could intensify those problems.

ARE THESE REALLY THE ‘TOUGHEST SANCTIONS IN HISTORY’?

It is too early to know. Trump and Bessent have supplied dramatic descriptions but few operational details. The answer will depend on which entities are designated, how aggressively secondary sanctions are applied, whether allies cooperate and how effectively Washington can disrupt Iranian oil exports and alternative payment channels.

The US already maintains an extensive sanctions architecture against Iran. The Office of Foreign Assets Control lists a series of Iran-related programmes targeting the energy, financial, shipping, military and nuclear sectors. The new campaign will have to go beyond adding more Iranian names to existing blacklists. Its real power would come from persuading or coercing third countries to stop helping Tehran trade.

That makes China’s response crucial. If major buyers and financial intermediaries continue finding ways around American measures, “Economic D-Day” may become another layer in a sanctions system Iran has spent decades learning to evade. If Washington succeeds in forcing them out, the shock to Iran could be severe.

WILL ECONOMIC PRESSURE BRING IRAN BACK TO THE TABLE?

That is Washington’s wager. Vance believes sustained pressure will change the kind of deal Tehran is willing to accept. Bessent says economic isolation can reduce the need for renewed military action. Trump argues that Iran rejected an opportunity to reach an agreement and must now face the consequences. But sanctions can produce two opposite responses. They can force a government to negotiate because the cost of resistance becomes unbearable. They can also harden resistance, strengthen the political position of security institutions and convince leaders that compromise will only invite further pressure. Iran continues to say it is open to dialogue, but only if Washington fulfils commitments and creates conditions for meaningful negotiations. The US is demanding concessions while escalating the pressure intended to obtain them.

The missiles may have receded from the centre of the strategy. The war has not. It has moved into oil shipments, bank accounts, exchange houses, shipping registries and the petrol prices paid by people thousands of kilometres from Hormuz.

(With inputs from ANI)