US readies fresh Iran sanctions as China buys 80% of its oil—energy routes and currencies at risk

On August 24, 2026, multiple market and policy signals converged around Iran’s energy trade and the US sanctions pipeline. A shipping-focused report cited Kpler data indicating China has bought more than 80% of Iran’s shipped oil (using 2025 data), placing Beijing at the center of Iran’s export lifeline. At the same time, US Treasury Secretary Scott Bessent was reported as preparing for another round of sanctions against Iran, with the US move expected to be announced around August 24. In parallel, Iran’s rial reportedly hit a new record low as the market priced in the coming restrictions, underscoring how quickly sanctions expectations are translating into currency stress. Strategically, the cluster highlights a classic sanctions dilemma: Washington seeks to tighten Iran’s revenue channels, while China’s demand for discounted barrels creates a strong incentive to keep flows moving. This puts Beijing in a bind—maintaining energy security and trade continuity versus absorbing higher compliance, shipping, and financial-risk costs if US enforcement intensifies. The “shadow fleet” framing in European coverage suggests the enforcement environment is already shaped by evasion networks, meaning new sanctions could target intermediaries, insurers, or payment rails rather than only cargoes. For Iran, the currency slide signals that even incremental tightening can rapidly erode macro stability, while for the US it tests whether secondary pressure can overcome entrenched demand. The market implications spill beyond Iran into global commodities and regional energy pricing. UK natural gas futures fell to around 161 pence per therm but stayed near multi-year highs as investors awaited details of a US plan to economically isolate Iran, raising the risk premium for Persian Gulf supply disruptions. Coal and oil-adjacent narratives also matter: reports pointed to firm Asian energy demand and supply risks pushing coal above $131 per ton, while China’s coal-to-liquids expansion claims to boost the value of coal-derived products that can substitute for certain oil uses. On metals, the picture is mixed—iron ore and steel show weakness tied to China’s property drag and elevated inventories, while copper eased as exchange inventories built—suggesting that sanctions-driven energy volatility is occurring alongside softer industrial demand. Next, the key watchpoints are the exact scope and enforcement mechanics of the anticipated US sanctions announcement around August 24. Traders and risk desks should monitor Iran’s rial trajectory, shipping compliance indicators (port calls, insurance coverage, and routing behavior), and any visible changes in Chinese procurement patterns for Iranian barrels. In energy, watch UK gas and broader European power-market spreads for confirmation that the risk premium is rising or fading. In industrial commodities, track China’s stimulus follow-through against steel rebar inventories and iron ore futures, because a demand rebound could offset sanctions-driven cost pressures, while renewed weakness would amplify downside for steel-linked supply chains. Escalation risk is highest if sanctions move from “threat” to “implementation” with clear secondary enforcement and tighter financial plumbing, while de-escalation would be signaled by delayed measures or carve-outs that stabilize trade flows.

Geopolitical Implications

• 01

  Secondary sanctions pressure on China’s oil trade is likely to intensify.

• 02

  Enforcement may target intermediaries and financial rails, not just cargoes.

• 03

  Iran’s macro vulnerability is visible through rapid FX deterioration.

• 04

  Energy security around Hormuz remains a key transmission channel to Europe.

Key Signals

• —Details of the US sanctions package and enforcement scope.
• —Rial exchange-rate moves after the announcement.
• —Shipping routing, insurance, and payment behavior for Iranian cargoes.
• —UK gas price path and European power-market spreads.
• —China’s stimulus impact on steel inventories and iron ore demand.