US Treasury launches weekly sanctions blitz on banks facilitating Iranian finance

The US Treasury Department is rolling out a sweeping new sanctions campaign against Iran, one that promises to hit foreign banks with secondary sanctions on a weekly cadence. The initiative, dubbed “Operation Economic Outcast,” targets financial institutions and individuals across five sectors: digital assets, technology, gold, aviation, and shipping.

Treasury Secretary Scott Bessent announced the operation on August 24, sanctioning nearly 60 entities and individuals in the opening salvo. The message to foreign banks is simple: cut ties with Iranian-linked entities on a defined timeline, or lose access to the US dollar system.

A $1.8 billion case study

Four days after the initial announcement, FinCEN moved to make an example. The agency proposed a rule to revoke correspondent banking access for Banque Misr’s UAE branch, effectively severing its connection to US financial institutions.

The reason: Treasury estimates the branch processed roughly $1.8 billion for 103 Iranian-linked companies between January 2024 and June 2026.

The Banque Misr action signals that Washington isn’t just going after Iranian entities directly. It’s targeting the intermediaries, the banks that serve as financial waypoints for sanctioned money flows, regardless of where those banks are headquartered.

The scale of enforcement

Operation Economic Outcast builds on a prior initiative called “Economic Fury,” which targeted shadow banking networks tied to Iran earlier in 2026. Since February 2025, the US has sanctioned over 1,000 persons, vessels, and aircraft connected to Iranian interests across multiple enforcement phases.

The defined-timeline approach adds another layer of pressure. Countries and institutions get a window to wind down Iran-related activities. Once that window closes, secondary sanctions kick in automatically.

Digital assets in the crosshairs

The inclusion of digital assets as one of the five targeted sectors is notable. Iran has long used crypto channels to circumvent traditional banking restrictions, and the Treasury’s decision to explicitly name the sector suggests enforcement is moving beyond the usual suspects in traditional finance.

What this means for global banking

Banks in the UAE, Turkey, and parts of East Asia, regions that have historically served as financial conduits for Iranian trade, face the most immediate pressure. The Banque Misr action makes the consequences concrete: process Iranian-linked transactions, and you risk losing access to the dollar.

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