Scotiabank Analyzes Potential Scope of U.S. Treasury’s Unprecedented Iran Sanctions

Background: A New Phase in the Iran Sanctions Debate

The U.S. Treasury Department, led by Secretary Scott Bessent, signaled on Friday that Washington plans to announce a series of “unprecedented economic isolation” measures against Iran next week. The announcement comes amid continuing blockades of Iranian ports and a broader effort to curb Tehran’s oil exports.

Bessent’s warning that the upcoming pressure campaign would be unlike anything seen in the history of economic isolation has sparked a detailed analysis from Derek Holt, head of Capital Markets Economics at Scotiabank in Toronto. Holt’s briefing to clients explores how the U.S. could go beyond the current restrictions on shadow tankers and refiners to dismantle the entire financial infrastructure that supports Iranian oil sales.

Possible Dimensions of the Expanded Sanctions

Targeting China and India

China remains the principal purchaser of Iranian crude, accounting for more than 90 % of its exports. The U.S. has already imposed sanctions on certain Chinese entities and, in April, targeted Chinese “Teapot” refineries. Holt suggests that the Treasury could widen its reach to sanction all Chinese banks, including major institutions, and restrict their participation in the U.S. and global financial systems. Such a move would push China further away from the SWIFT network and deny access to correspondent banking and U.S. dollar funding markets. The potential fallout could provoke strong retaliatory measures from Beijing.

India, while not a major buyer of Iranian oil, could also face increased scrutiny, especially if the sanctions extend to any entity involved in the financing or shipping of Iranian energy.

Broadening the Scope of Sanctions on Iran

Under this scenario, the U.S. would broaden its list of prohibited parties to include any global organization, company or individual that buys, finances, insures or transports Iranian oil. This would target banks, currency exchanges, commodity traders and shipping firms. The aim would be to prevent the sale of Iranian oil in yuan and its conversion into dollars or other currencies through Iranian and overseas exchange houses. The sanctions could also extend to Middle Eastern intermediaries, such as Dubai, whose financial infrastructure currently facilitates Iranian transactions.

Freezing Iranian Crypto and Asset Holdings

Last month, the Treasury announced measures aimed at individuals and entities linked to a specific Iranian figure. Holt proposes that the new campaign could expand to freeze all Iranian holdings of crypto, gold, real estate and foreign accounts, thereby tightening the country’s access to alternative funding sources.

Targeting Global Shipping Ports

Another avenue would involve sanctioning foreign ports that enable trade and transactions with shipping companies that transit Iranian ports. By cutting off these logistical hubs, the U.S. could further isolate Iran’s maritime commerce.

Potential Effectiveness and Risks

Holt cautions that while Iran has endured significant hardship and is accustomed to international isolation, it still maintains allies in less affluent regions and possesses its own escalation tools, including the threat of “unspeakable terror.” The broader sanctions could, therefore, be a double‑edged sword.

The economic fallout could ripple across the global financial system. Sanctioning major Chinese banks or other large institutions could trigger systemic risk, destabilize dollar‑funding markets, and undermine confidence in global banking networks. The U.S. Treasury would need to weigh these risks against the strategic objective of crippling Tehran’s oil revenues.

Moreover, a sweeping crackdown could heighten tensions with China and India, especially ahead of the planned meeting between Presidents Trump and Xi Jinping. The removal of discounted Iranian crude from the market could also tighten global supply, pushing Brent and WTI prices higher.

Conclusion

The U.S. appears to recognize that a purely military approach may not secure victory over Iran. However, the Treasury’s potential escalation into a comprehensive economic blockade carries significant geopolitical and financial uncertainties. Scotiabank’s analysis underscores the complexity of balancing punitive measures against the risk of destabilizing the broader global economy.

For in‑depth coverage of Gulf region energy markets and policy implications, professional subscribers can access Scotiabank’s Marketdesk.ai portal.