US-Iran sanctions squeeze firms as China counters dollar power

By mid-2026, the US Treasury, led by Secretary Scott Bessent, significantly escalated its sanctions regime against Iran through a comprehensive enforcement strategy dubbed 'Operation Economic Outcast.' This campaign expanded beyond traditional banking sectors to aggressively target Iran's cryptocurrency exchanges—including Nobitex, Bitpin, Ramzinex, Wallex, Shelbit, and Aban Tether—highlighting the administration's focus on disrupting Iran's use of digital assets for terrorism financing and sanctions evasion. The Treasury's approach also encompassed over 60 individuals, entities, and vessels involved in Iran's nuclear, cyber, oil smuggling, and technology procurement activities, aiming to choke off Tehran's revenue channels across five critical non-oil sectors: digital assets, technology, gold, aviation, and shipping.

The US Treasury's enforcement strategy has increasingly turned financial institutions into frontline enforcers of sanctions, issuing stern warnings to banks worldwide about the risks of facilitating transactions with Iranian and Chinese sanctioned entities. FinCEN alerts have highlighted the Islamic Revolutionary Guard Corps' (IRGC) sophisticated evasion tactics, compelling banks to scrutinize transactions and customers more rigorously, which has sometimes led to overcorrection affecting legitimate Iranian diaspora financial activities. This financial surveillance, embedded in suspicious-activity reporting, effectively transforms global banking systems into a battlefield of economic warfare, underscoring the critical role of compliance in the sanctions regime.

While the US has broadened secondary sanctions to threaten any global entity—including major financial institutions and nations like China—that facilitates Iran's financial networks, enforcement remains calibrated to avoid direct confrontation with Beijing's largest banks. Despite sanctioning numerous Chinese firms and refineries involved in Iranian oil trade, major Chinese financial institutions have so far escaped formal designation, reflecting a strategic balancing act to prevent escalating US-China tensions ahead of high-level diplomatic summits. This cautious posture, described as the 'Welch Farrar test,' illustrates the geopolitical constraints shaping the sanctions regime's reach and the ongoing challenge of fully severing Iran's economic lifelines.

The shift from kinetic military deterrence toward an intensified economic campaign against Iran reflects a systemic policy pivot aimed at 'zero-leakage' in Iran's financial networks. Treasury Secretary Bessent has framed these sanctions as the financial equivalent of military action, emphasizing unprecedented economic isolation combined with naval blockades to constrain Iranian imports and exports. However, enforcement has been strategically phased, providing countries and companies a compliance window to sever ties with Iran to avoid exclusion from the US dollar system, thereby signaling a preference for gradual pressure over destabilizing global financial markets. This approach has already triggered significant market reactions, including a surge in Brent crude prices above $92 per barrel and rising gold prices amid geopolitical risks.

China has established robust legal and financial countermeasures, including blocking rules and the anti-foreign sanctions law, to resist the extraterritorial reach of U.S. sanctions, creating a fraught compliance landscape for multinational firms caught between the renminbi and U.S. dollar systems. This bifurcation forces companies to choose between access to China’s vast market or participation in U.S. dollar transactions, intensifying risks especially in sectors like banking, insurance, and logistics. As tensions escalate, China’s strategic defense prioritizes key economic actors such as major refiners like Hong Li, signaling Beijing’s calculated approach to shielding vital interests amid mounting U.S. pressure.

China’s central role as Iran’s primary oil buyer—importing roughly 80 to 90 percent of Iranian crude, amounting to about 1.4 million barrels daily before recent hostilities—places it squarely at the heart of the U.S.-China sanctions rivalry. The U.S. has sanctioned nearly 60 China and Hong Kong-based entities involved in Iranian oil revenue facilitation, yet deliberately spares major Chinese banks like the Bank of China to avoid triggering broader trade conflicts ahead of high-level diplomatic meetings such as President Xi Jinping’s scheduled visit to Washington. This calibrated enforcement underscores Washington’s cautious balancing act between sanctioning Iran-linked trade and maintaining fragile bilateral relations.

In response to expanding U.S. sanctions—now extending to digital asset transactions involving Iran—China has vocally condemned these measures as illegal unilateral overreach, asserting that China-Iran cooperation remains within international law and pledging to protect its national interests by all necessary means. This diplomatic pushback, articulated by Foreign Ministry spokesperson Lin Jian, highlights Beijing’s broader resistance to sanctions perceived as threats to its economic sovereignty and energy security. Meanwhile, the U.S. move to target crypto exchanges and payment processors introduces complex compliance challenges globally, potentially accelerating shifts toward decentralized finance platforms that evade traditional regulatory frameworks.

China’s long-term strategic preparations against U.S. financial pressure are evident in the development of alternatives like the Cross Border Interbank Payment System (CIPS), designed to reduce dependence on the U.S. dollar and circumvent sanctions. This financial infrastructure, combined with China’s economic leverage as the largest purchaser of Iranian oil and its significant holdings in U.S. Treasury securities, complicates U.S. enforcement efforts by raising the stakes of potential retaliation and economic instability. Analysts warn that aggressive sanctions targeting China could backfire, risking higher fuel prices in the U.S. and destabilizing global markets, thereby underscoring the intricate geopolitical and economic calculus underpinning the sanctions landscape.

By mid-2026, the U.S. Treasury's aggressive sanctions campaign against Iran's cryptocurrency sector, including exchanges like Nobitex, Bitpin, Ramzinex, Wallex, Shelbit, and Aban Tether, exposed the critical role these platforms play in facilitating illicit finance and terrorism-linked activities. Operators such as Siavash Kayvanpour leveraged complex multinational networks spanning Georgia, the UAE, and Poland to move billions in crypto transactions tied to the IRGC, complicating compliance for global financial institutions and forcing crypto platforms to enhance KYC/AML protocols or face asset freezes and legal prosecution. This crackdown, part of the Biden administration's 'Economic Fury' and 'Operation Economic Outcast,' signals a strategic focus on cutting off Iran’s alternative finance channels through intensified secondary sanctions targeting both primary actors and third-party service providers.

The sanctions extend far beyond crypto, targeting five critical Iranian sectors—digital assets, technology, gold, aviation, and shipping—to enforce a 'zero-leakage' economic blockade. This broad approach has disrupted Iran’s oil exports, causing supply crunches for Asian refiners like China’s independent 'teapots,' and created bottlenecks in vital shipping and aviation corridors, thereby complicating multinational trade networks. Concurrently, the financial warfare has driven a flight to gold and the U.S. dollar amid heightened geopolitical risks, underscoring the sanctions’ ripple effects across global commodity markets and trade logistics.

Iran’s sophisticated use of shadow banking and multinational financial structures, exemplified by entities like the Ansari network and Smart Global Limited, has significantly complicated sanctions enforcement. These networks employ shell companies and bank accounts across jurisdictions such as Germany, Luxembourg, Spain, the UK, Cyprus, and the UAE to invest Iranian funds in real estate and commercial assets, challenging traditional compliance frameworks. This complexity demands that fintech companies, which historically maintained lighter compliance functions than banks, now adopt robust screening and due diligence processes akin to established financial institutions, while simultaneously creating market opportunities for blockchain analytics firms like Chainalysis and Elliptic to aid in tracking illicit finance.

The intensified sanctions regime has heightened compliance risks for global financial institutions, with U.S. Treasury Secretary Scott Bessent warning of imminent sanctions against a major financial institution, signaling potential exclusion from the U.S. dollar system. This escalation complicates remittance and clearing networks worldwide, particularly affecting banks in China and India, and fuels geopolitical tensions exemplified by China’s vocal defense of its lawful cooperation with Iran. Moreover, the sanctions’ expansion to digital assets may accelerate migration toward decentralized finance platforms, which pose regulatory challenges and complicate enforcement efforts, reflecting the evolving battleground of economic warfare intertwined with the US-China rivalry.

Multinational corporations, particularly luxury watch brands like Cartier, are caught in a precarious dual-compliance trap due to overlapping US sanctions on Iran and China's aggressive counter-sanctions under Decree 835 and MOFCOM Announcement No. 21. This regulatory environment, marked by China’s Blocking Statute regime with private rights of action and potential criminal liability, extends liability beyond designated entities to those controlled or associated with them, effectively dissolving safe firewalls within corporate groups. The rapid escalation of China’s Unreliable Entity List—from just 3 in 2024 to 67 in 2025—signals a shift from symbolic to operational enforcement, yet major luxury groups have conspicuously remained silent on these risks in their 2026 earnings calls, underscoring an industry-wide reluctance to publicly confront this legal minefield.

Navigating the conflicting US and Chinese sanctions regimes places multinational entities in a legal and operational vise, as compliance with one side’s rules risks lawsuits or penalties from the other. Many firms have pragmatically aligned themselves predominantly with either the US dollar or the renminbi to mitigate secondary sanctions risk, but complex supply chains—especially in banking, commodity trading, and logistics—make tracing exposure a daunting challenge. For example, banks lending to Chinese private refiners like Hung Li are still unraveling their client networks to assess liabilities, while the oil shipping sector grapples with shadow fleets near Southeast Asia that create inadvertent exposure to sanctioned crude movements. This complexity foreshadows an inevitable no-win scenario where a multinational will have to choose between losing access to the Chinese market or the US dollar system, highlighting the urgent need for proactive scenario planning.

In African markets, the collision of US and Chinese sanctions regimes manifests as a regulatory gridlock that forces multinational corporations into untenable compliance dilemmas. US leverage over the USD clearing system and SWIFT network compels African banks to de-risk by cutting services to Chinese firms blacklisted by the US, disrupting liquidity and stalling project financing. Simultaneously, China’s Anti-Foreign Sanctions Law (AFSL) prohibits compliance with foreign sanctions against Chinese entities, exposing African companies to severe legal risks in China including lawsuits and asset seizures if they comply with US mandates. This friction plays out across capital architecture, tech procurement, and sovereign concessions, amplifying transactional overhead and operational vulnerabilities.

To navigate this labyrinth of overlapping sanctions and mitigate escalating risks, corporations are adopting a sophisticated three-tiered strategy: ring-fencing corporate entities to isolate exposure, transitioning to multi-currency clearing networks to reduce reliance on the US dollar, and implementing asymmetric force majeure clauses to manage contractual uncertainties. This strategic architecture aims to create operational buffers against the unpredictable enforcement landscape, reflecting a growing recognition that traditional compliance frameworks are insufficient in the face of intensifying US-China rivalry and its global ripple effects.

By mid-2026, the US Treasury, led by Secretary Scott Bessent, escalated sanctions enforcement targeting Iran’s financial networks and Chinese intermediaries, signaling a strategic pivot from military deterrence to comprehensive economic isolation. This approach, exemplified by actions against Iranian crypto exchanges, shadow banking networks like the Ansari network, and Chinese financial institutions, underscores the intensifying geopolitical rivalry between Washington and Beijing. However, the US has deliberately avoided sanctioning major Chinese banks to prevent destabilizing the fragile US-China trade relationship, especially ahead of the Trump-Xi summit, reflecting a nuanced balancing act amid rising tensions.

The sanctions campaign has triggered significant market volatility, notably pushing Brent crude oil prices above $92 per barrel due to disruptions in Iranian oil exports and the closure of the Strait of Hormuz, a critical chokepoint for global energy supplies. This economic pressure is compounded by US domestic concerns, with Vice President JD Vance prioritizing lower fuel prices for Americans over nuclear non-proliferation goals, while prolonged US naval deployments strain military resources. These factors collectively heighten the risk of escalation and complicate diplomatic negotiations, as Iran rejects sanctions as coercive and the US relies increasingly on economic tools amid constrained military options.

The expansion of sanctions into emerging technologies, particularly digital assets and cryptocurrencies, has exposed the crypto ecosystem to unprecedented regulatory scrutiny, forcing platforms like Chainalysis and Elliptic to enhance blockchain analytics and compliance measures. The US’s targeting of Iran’s use of crypto for sanctions evasion, including stablecoin liquidity providers and centralized exchanges, reflects a broader trend of financial warfare adapting to fintech innovations. Yet, this intensification risks driving illicit activity toward harder-to-regulate decentralized finance platforms, complicating enforcement and increasing operational risks for global market participants.

Despite the US’s robust sanctions framework, experts remain skeptical about their efficacy in compelling Iran to alter its behavior, noting Iran’s ideological resilience and historical endurance under sanctions. The intertwined US-China rivalry further complicates enforcement, as China’s strong opposition and strategic economic ties to Iran—including purchasing about 90% of Iranian oil—limit Washington’s options without risking a broader economic confrontation. Analysts warn that escalating sanctions could provoke retaliatory actions from Iran and China, potentially destabilizing global financial markets and undermining diplomatic efforts such as the Trump-Xi summit, highlighting the precarious balance between economic pressure and geopolitical risk.

African businesses face a labyrinthine compliance landscape as overlapping US and Chinese sanctions regimes converge, particularly impacting sectors like mining, banking, telecommunications, and infrastructure. This dual pressure forces multinational corporations into a regulatory catch-22, where adhering to US secondary sanctions risks violating China’s Anti-Foreign Sanctions Law, inflating compliance costs and creating liquidity chokepoints when African banks preemptively sever ties with blacklisted Chinese firms to preserve correspondent banking relationships with US institutions. As Cheta Nwanze of SBM Intelligence observes, navigating these overlapping sanctions is far from a binary choice, demanding nuanced strategies to maintain capital flows and operational continuity across the continent’s primary growth sectors.

The US Treasury’s aggressive expansion of secondary sanctions targeting Iran’s digital assets, technology, gold, aviation, and shipping sectors under 'Operation Economic Outcast' has sent shockwaves through global trade networks, especially affecting countries in Asia and Africa. By threatening exclusion from the US dollar clearing system, these measures complicate remittance and clearing operations for major economies like China and India, while exacerbating supply chain bottlenecks through disruptions in critical Iranian shipping and aviation corridors. This 'zero-leakage' economic blockade strategy intensifies compliance burdens on local banks and multinational corporations, forcing them to meticulously assess third-party risks amid a tightening global financial noose.

Thailand exemplifies the far-reaching ripple effects of US sanctions on Iran, where despite no direct Thai legal prohibitions, the nation’s deep integration with the US financial system—reliant on dollar clearing and American correspondent banking—exerts substantial leverage compelling urgent compliance reforms. Thai banks, exporters, and sectors such as shipping, aviation, cryptocurrency, and gold trading now face a ticking clock to enhance due diligence, scrutinizing ownership structures and transaction purposes to avoid inadvertent violations that could trigger frozen transfers or secondary sanctions. The US government’s coordinated diplomatic pressure, including defined timetables and potential unilateral actions, underscores the heightened regulatory complexity and financial risks confronting Thai institutions as they navigate this expanded sanctions regime.