Treasury launches sweeping new sanctions campaign against Iran

The Treasury Department unveiled a sweeping new sanctions campaign against Iran on Monday, designating nearly 60 individuals, entities and vessels in what Secretary Scott Bessent called the country's "economic D-Day" — a coordinated push to cut off the revenue streams that keep Iran's oil, shipping, gold and cryptocurrency networks running.

Speaking at a press conference, Bessent framed the action, dubbed "Operation Economic Outcast," as a decisive break from past approaches. "Today, at President Trump's direction, the United States Treasury has begun Operation Economic Outcast, an unprecedented campaign against the Islamic Republic of Iran and its enablers," he said, according to Treasury's official announcement. "Our objective is to sever every economic lifeline that sustains this tyrannical regime until Tehran stands alone."

What happened

The action spans five new sectoral sanctions determinations issued under Executive Order 13902, covering digital assets, technology, gold, aviation and shipping — the broadest single-day expansion of Iran sanctions authority Treasury has issued this year. Roughly two dozen individuals and more than 50 entities were named, based in jurisdictions including China, Hong Kong, the United Arab Emirates, Singapore, Switzerland and Turkey, according to the Office of Foreign Assets Control's list of Monday's designations.

Six tankers tied to what Treasury describes as Iran's "shadow fleet" — vessels flagged to Botswana, Cameroon, Vanuatu and Gambia and used to move sanctioned crude and LPG — were individually blacklisted. OFAC also suspended several general licenses covering remittances and academic and cultural exchanges with Iran, and issued new guidance on the sanctions risk of any Iranian move to restrict shipping through the Strait of Hormuz.

The numbers

Among those designated were alleged cyber operatives linked to Iran's Ministry of Intelligence and Security, four of whom were also named in an August 18 Justice Department indictment charging 17 Iranian nationals with cyber offenses, and individuals accused of brokering oil sales on behalf of the Islamic Revolutionary Guard Corps' Qods Force — including one broker Treasury says processed more than $100 million in cryptocurrency payments since 2023. Bessent said the campaign marks roughly the eighth Iran-related Treasury action taken this year and signaled that a sanctions designation against a major financial institution would follow "by week's end."

Oil markets moved on the news even as the sanctions targeted Iranian crude exports: West Texas Intermediate fell to roughly $85 a barrel and Brent slipped to about $92.70, both down close to 2 percent, as traders who had been positioning for the announcement in advance booked profits. Some analysts, including Morgan Stanley, have said prices could still approach $100 a barrel by year's end if Iran follows through on threats to restrict Gulf shipping.

Context

Monday's action follows roughly six months of active conflict between Iran and Israel and the United States, and builds on a series of earlier steps, including an August 7 action against an Iranian bank and Dubai exchange houses and the FBI's cyber indictment ten days ago. Treasury has also moved this year to suspend Iran's ability to draw on gold reserves to prop up its currency, which has fallen past two million rial to the dollar on the open market, alongside inflation Treasury officials put near 90 percent and reported shortages of basic medicines. In a bundled action the same day, the State Department removed Syria's designation as a state sponsor of terrorism and delisted the armed group Hay'at Tahrir al-Sham from its terrorist list, a separate but related recalibration of U.S. Middle East sanctions policy.

Who is affected

China, which buys an estimated 90 percent of Iran's oil exports, is the campaign's largest implicit target; administration officials have said Beijing will not be exempted from enforcement. Banks and trading firms in the UAE, Hong Kong and Singapore identified as handling Iran-linked transactions now face the prospect of exclusion from the U.S. dollar financial system if they do not wind down those relationships within the cure periods Treasury has attached to most of the new sectoral determinations.

Reaction

"We are giving everyone the opportunity to remedy bad behavior," Bessent said. "We do not have infinite patience here."

Iran's response was defiant. Mohsen Rezaei, secretary of the country's Supreme National Security Council, vowed to "neutralize the economic war" and said, according to CBS News' account of his remarks, that if neighboring states cooperated with the U.S. campaign, "not a single drop of oil" would leave the Gulf through the Strait of Hormuz. Iran's Foreign Ministry called the sanctions a "declaration of war" against any nation that complies with them. Tehran had already signaled its willingness to use Hormuz shipping as leverage days earlier, when it opened a narrow exception to let Iraqi oil tankers pass while keeping broader restrictions in place. President Masoud Pezeshkian struck a more measured tone in a televised address, acknowledging strain from "major imbalances in water, electricity, gas, fuel, the environment, and the banking sector" and saying Iran "cannot continue with war forever."

Not everyone is convinced the new measures will move the needle. Alan Eyre, a former U.S. diplomat who worked on Iran policy, told NPR that prior rounds of sanctions have already reached most of the "low-hanging fruit," raising questions about how much additional pressure this latest expansion can realistically apply.

What happens next

Bessent's promised action against a major financial institution, expected within days, will be the next signal of how aggressively Treasury intends to enforce the new sectoral rules. Analysts are watching the Strait of Hormuz closely for any sign Iran acts on Rezaei's threat, and oil markets for confirmation of whether prices resume climbing toward the $100 mark some forecasters have flagged. Treasury has said it is coordinating enforcement timelines with foreign governments, meaning the list of countries facing secondary-sanctions pressure could grow in the weeks ahead.