US Treasury to unveil sweeping Iran sanctions as rial hits record low

Iran's currency reached a fresh low on informal markets Monday as the United States prepared to announce additional sanctions aimed at cutting off the regime's remaining revenue sources. The rial traded at 2.02 million to the dollar at the opening of unofficial exchanges, well below the Central Bank's official rate of roughly 1.5 million to the dollar. Most Iranians rely on the informal rate for daily transactions, and the gap has widened steadily amid ongoing conflict and restricted trade.

The decline follows nearly six months of war that began with strikes by the United States and Israel on February 28. Even before those attacks, Iran's economy showed double-digit inflation and negative growth. The combination of a naval blockade on Iranian ports and earlier sanctions has further reduced oil export earnings, which form the bulk of government revenue. Informal markets have priced in the added pressure, pushing the rial past the two-million mark for the first time.

Treasury Secretary Scott Bessent described the coming measures as the single greatest financial offensive ever mounted against an adversary and referred to them as an economic D-Day. The steps are expected to expand existing restrictions on Iran's banking, energy, and shipping sectors while targeting foreign entities that continue to buy Iranian oil, particularly in China. Previous sanctions already limited formal channels, but secondary penalties on third-party traders could tighten the remaining outlets.

Iranian officials have responded with warnings of retaliation. Security chief Mohsen Rezaei stated that if neighboring countries join the sanctions effort, no oil would leave the Persian Gulf. Tehran has also signaled that it would require permission for ships to transit the Strait of Hormuz, through which one-fifth of the world's traded oil normally flows. Attacks and threats since the start of the war have already reduced that traffic sharply.

The regime's control of the strait has not produced the leverage its leaders anticipated. Despite the disruption, the United States has secured no major concessions on nuclear issues or regional behavior. Iranian Foreign Minister Abbas Araghchi dismissed the planned sanctions as economic terrorism and pointed instead to rising US debt levels as evidence of American weakness. Such statements have not reversed the rial's slide or restored investor confidence.

Markets continue to reflect the underlying mismatch between Iran's production capacity and its spending commitments. Pre-war policies of price controls, subsidies, and centralized allocation already distorted resource use and encouraged capital flight. The added costs of war and blocked exports have compounded those distortions, leaving ordinary households to absorb higher prices for imported goods and reduced access to foreign currency.

Bessent noted that nations providing financial lifelines to Tehran should expect isolation of their own. The approach relies on the same price signals that have already driven the rial lower: cutting revenue raises the cost of sustaining the current system. How far the new measures extend and whether they alter Iran's stance on the strait remain open questions, but the currency data so far show clear effects on the regime's economic position.