WASHINGTON, Aug. 24, 2026: The United States is entering a new phase of its confrontation with Iran, with Treasury Secretary Scott Bessent declaring the start of an expanded economic campaign designed to sever Tehran's remaining financial and commercial lifelines. The move comes as Iran maintains severe restrictions on passage through the Strait of Hormuz, turning the sanctions confrontation into a wider threat to the movement of oil and liquefied natural gas through one of the world's most important energy chokepoints.
Bessent has described the campaign as the "single greatest financial offensive ever marshalled against an adversary" and said Washington intends to use its full range of economic powers to isolate Tehran. The specific measures to be imposed were still being detailed, making the enforcement of any new restrictions against Iran's trading partners the key question for the next stage of the campaign.
President Trump has dismantled Iran’s military capabilities, destroyed nearly 100 percent of its military factories, and buried its nuclear program.
— Treasury Secretary Scott Bessent (@SecScottBessent) August 23, 2026
We are now entering the endgame. At dawn begins an economic D-Day — the single greatest financial offensive ever marshaled against…
Washington's Economic Offensive
The new campaign builds on an extensive U.S. sanctions structure targeting Iran's oil revenues, shipping networks, financial intermediaries and sanctions-evasion mechanisms.
The U.S. Treasury has previously targeted foreign companies, vessels and intermediaries involved in Iran's petroleum trade, including China-based entities that purchase or facilitate the movement of Iranian crude. Treasury has described these actions as efforts to disrupt the networks that provide Iran with petroleum revenue.
The effectiveness of the new campaign will therefore depend not simply on the number of Iranian entities added to sanctions lists, but on whether Washington can restrict the foreign companies, financial channels and trading networks that continue to give Tehran access to international markets.
CSIS research on Iran sanctions has examined the difficulty of maintaining economic pressure when foreign buyers and intermediaries continue to provide access to international markets. The institute's analysis suggests that enforcement against third-country actors is critical to the effectiveness of a broader sanctions strategy.
China Becomes the Critical Test
China is central to that calculation because it remains a major destination for Iranian crude and an important economic partner for Tehran.
Brookings researchers examining the Iran conflict say Beijing's interests extend beyond its relationship with Tehran to the wider consequences of instability in the Gulf and China's relationship with Washington. Their assessment is that the conflict is forcing Beijing to balance energy security, strategic interests and its relationship with the United States.
Any attempt by Washington to put substantially greater pressure on Chinese participants in the Iranian oil trade could therefore extend the sanctions confrontation into the broader U.S.-China economic relationship.
The question for Washington is whether additional pressure on Iranian oil revenue would justify the diplomatic and commercial costs of enforcing sanctions against third-country buyers.
Tehran Turns to Hormuz
Iran has increasingly linked the future of the Strait of Hormuz to the wider confrontation with Washington.
Iranian officials have warned that continued U.S. economic pressure could lead to further restrictions on energy shipments through the Gulf. Iran's Foreign Ministry has rejected the American sanctions campaign and maintained that Tehran will not yield to economic coercion.
Iran says repeated US sanctions will fail, with Foreign Ministry spokesman Esmaeil Baqaei accusing Washington of using measures that harm ordinary Iranians
— Anadolu English (@anadoluagency) August 24, 2026
⚠️ Baqaei says sanctions and pressure on other countries to limit trade with Iran violate free trade and national… pic.twitter.com/QXxCy0KpKb
Iran's position gives the sanctions confrontation a direct connection to the global energy system. The International Energy Agency's August Oil Market Report says global oil supply in July remained 6.3 million barrels per day below year-earlier levels, while 8.3 million barrels per day of Gulf production remained shut in. The agency also reduced its projection for third-quarter 2026 oil supply by 1.7 million barrels per day because renewed hostilities and maritime disruptions undermined the recovery in flows.
What Could Iran Do Next?
The critical question for energy markets is whether Tehran will continue using restrictions around Hormuz as bargaining leverage or move toward a more sustained disruption of commercial shipping.
CSIS's analysis of the conflict has focused on the strategic importance of Hormuz and the vulnerability of the global energy system to disruption there. Its work on the LNG market also shows that the consequences extend beyond crude oil because major Gulf LNG exporters depend on the waterway.
Iran does not necessarily have to impose a permanent closure to create economic costs. Restrictions, uncertainty over safe passage and increased risks for commercial vessels can affect shipping decisions and increase the cost of transporting energy.
Brookings' analysis of the Hormuz crisis similarly points to the importance of the duration of the disruption and the ability of alternative suppliers and routes to compensate for lost Gulf flows. Its assessment is that the longer the disruption persists, the greater the pressure on oil markets.
Chatham House's analysis adds another dimension: even if Hormuz is reopened, security concerns, insurance costs and damage to regional energy infrastructure could continue to affect energy flows.
The Oil Chokepoint
The scale of the potential disruption is enormous. The IEA's latest assessment shows that the crisis has already produced a major reduction in Gulf oil production and a substantial drawdown in inventories. Global observed oil inventories fell by 69 million barrels in July, while total stocks were down 410 million barrels from the start of the war.
The agency said regional exports, including volumes using routes that bypass Hormuz, fell by 2.1 million barrels per day in July after the waterway was effectively closed again and oil infrastructure and tankers came under attack. Loadings through the region peaked at 20 million barrels per day early in July but fell to around 12 million barrels per day later in the month.
The distinction is important: the waterway has not simply disappeared from the global energy system. Some shipping continues, while the volume and reliability of the flows remain far below normal.
LNG Faces the Same Threat
Oil is not the only market exposed. Chatham House has warned that even an eventual reopening of Hormuz would not immediately remove the energy risks created by the crisis. Its analysis points to continuing security concerns, insurance costs and damage to regional energy infrastructure as factors that could affect supplies after the waterway reopens.
CSIS has separately assessed the consequences for global LNG markets, highlighting the particular vulnerability of Qatar, a major LNG exporter whose shipments depend heavily on the Strait of Hormuz.
A prolonged disruption could therefore affect electricity generation and industrial production as well as petrol and diesel prices. The consequences would be particularly serious for economies that rely heavily on imported Gulf energy.
From Energy Shock to Inflation
The economic effects would spread beyond the energy market. The IEA's latest figures show that the oil market is already absorbing a substantial reduction in Gulf production while inventories are being drawn down. The agency says world oil demand is also being affected by the continuing closure of Hormuz and elevated fuel prices.
Brookings' assessment of the Hormuz crisis warns that the economic damage can spread well beyond the immediate oil market when alternative supplies and transport routes cannot compensate for disrupted Gulf exports.
Higher energy prices raise transportation and production costs, while more expensive gas can increase electricity and industrial costs. If those pressures persist, they can complicate the task facing central banks by pushing inflation higher at a time when weaker trade and more expensive production are weighing on growth.
Asia Faces Heavy Exposure
The exposure is particularly acute in Asia, where major economies depend heavily on Gulf energy.
CSIS has highlighted the vulnerability of Asian energy systems to disruption around Hormuz and examined the consequences for countries including Japan and South Korea, both of which depend heavily on imported energy.
A prolonged disruption would therefore affect more than national energy markets. It could raise costs for manufacturing, shipping and electricity generation in economies that are deeply integrated into global supply chains.
Washington's Dilemma
For Washington, the objective is to increase the economic cost of continued Iranian resistance and restrict the financial channels available to Tehran. The Treasury's sanctions programme has focused on the companies, vessels and intermediaries that sustain Iran's oil trade.
But independent analysts see a difficult trade-off. Brookings researchers have warned that disruption around Hormuz can produce consequences far beyond the countries directly involved in the conflict because alternative supplies and transport routes cannot immediately replace all lost Gulf exports.
CSIS's analysis of the energy crisis similarly shows that disruption of the waterway affects oil, LNG, shipping and national energy-security calculations far beyond Iran.
The implication is that the effectiveness of sanctions and the stability of the global energy market are becoming increasingly interconnected. If economic pressure reduces Iran's oil revenues while restrictions around Hormuz continue, Washington could intensify pressure on Tehran while global energy costs remain elevated.
For Iran, the calculation is also complicated. Chatham House's analysis points to the longer-term vulnerability created by dependence on concentrated energy routes, while IEA data show how severely the disruption has already affected global oil supply and inventories.
