How the U.S. Treasury Engineered a Dollar Squeeze in Iran

Why It Matters

The dollar squeeze directly undermines Iran’s primary revenue stream, accelerating diplomatic leverage for the United States while signaling a new, aggressive use of financial tools in geopolitical conflicts.

Key Takeaways

• U.S. Treasury reclassified Iranian banks as primary sanctions targets
• Dollar clearing prohibited for Iranian oil transactions via SWIFT
• Secondary sanctions threaten non‑U.S. firms facilitating Iran dollar trades
• Iran’s foreign reserves fell 30% after dollar access cut
• Reduced dollar flow pressures Iran to negotiate nuclear deal

Pulse Analysis

The Treasury’s latest maneuver builds on a decade of sanctions that have gradually isolated Iran from the global financial system. By designating Iranian banks as primary targets, the agency effectively barred them from correspondent relationships with U.S. dollar clearinghouses. This strategy leverages the dollar’s status as the world’s reserve currency, forcing foreign banks to choose between lucrative Iranian business and continued access to U.S. markets. The secondary sanctions component extends the reach of U.S. policy, threatening any non‑U.S. entity that processes dollar‑denominated payments for Iran, thereby creating a chilling effect across the broader financial ecosystem.

The immediate impact on Iran’s economy is stark. With dollar‑based oil sales curtailed, Tehran’s foreign‑exchange reserves have reportedly plunged by roughly 30 percent since the restrictions took effect. Iranian exporters are scrambling to find alternative currencies or barter arrangements, but the lack of a universally accepted substitute for the dollar hampers these efforts. Domestic inflation has surged, and the government’s fiscal deficit is widening, compelling policymakers to prioritize short‑term cash flow over long‑term economic reforms. This financial pressure is intended to force Tehran back to the negotiating table on its nuclear program, where concessions may be extracted in exchange for sanction relief.

Beyond Iran, the Treasury’s approach sets a precedent for how the United States may wield monetary power against adversaries. The use of secondary sanctions and SWIFT exclusions signals to other sanctioned states that even indirect involvement with the dollar system can trigger punitive measures. For multinational corporations, the move underscores the need for robust compliance frameworks that can quickly adapt to shifting sanction regimes. Meanwhile, allies and partners must weigh the benefits of aligning with U.S. policy against the risk of collateral damage to their own financial institutions, potentially reshaping the architecture of global trade finance.