The United States is poised to launch its “greatest financial offensive ever” against Iran, as announced by Treasury Secretary Scott Bessent, escalating tensions following a missed ceasefire deadline. In response, Tehran has threatened to seize vessels violating transit rules in the critical Strait of Hormuz and warned regional allies against cooperating with U.S. sanctions. Oman’s foreign minister is scheduled to visit Tehran for urgent talks aimed at de-escalating the situation in the vital shipping lane.
The United States is preparing to launch what Treasury Secretary Scott Bessent describes as 'the single greatest financial offensive ever' against Iran, set to be unveiled this Monday. This aggressive move comes as Tehran escalates its own rhetoric, threatening to seize vessels that violate transit regulations within the strategically vital Strait of Hormuz.
This looming escalation follows the expiration of a 60-day ceasefire window, failing to yield a deal and effectively ending the formal truce mechanism intended to halt the six-month-old Middle East conflict.

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In a recent post on X (formerly Twitter) on Sunday evening, Bessent declared that 'at dawn begins an economic D-Day,' characterizing the impending measures as the 'endgame' of Washington's long-standing campaign against Tehran. These new sanctions will build upon an already extensive regime targeting Iran's banking, energy, aviation, and cryptocurrency sectors. The U.S. administration has previously asserted that Iran's economy is in freefall, plagued by rampant inflation and a collapsing currency, as detailed in an earlier CNBC report.
While the precise details of these new economic measures remain undisclosed, the Iranian rial plummeted to a new open-market low on Sunday, with the U.S. dollar exceeding 2 million rials, according to Gulf News. Bessent also issued a stern warning that 'any nation that serves as a financial artery of a withering regime should expect to share in its isolation,' a statement clearly directed at foreign governments and entities still engaging in transactions with Tehran. He has consistently warned of potential secondary sanctions against countries and organizations conducting business with Iran.
Writing in the Financial Times on Sunday, Bessent elaborated on the network of support for Iran: 'Iran's enablers purchase and transport its petroleum. They facilitate the flow of its finances through exchange houses and free trade zones. They welcome Iran's flights and maintain registries on its behalf. They turn a blind eye to seaborne fuel transfers and the illicit use of their banks, all while concealing the extent of their complicity.'
Iran has swiftly countered these threats by warning its Gulf neighbors against aligning with U.S. economic measures and by tightening its control over the Strait of Hormuz, a critical maritime chokepoint through which approximately one-fifth of the world's seaborne oil traversed prior to the current conflict.
On Saturday, Mohsen Rezaei, the newly appointed secretary of Iran's Supreme National Security Council, vowed to target the interests of oil-rich neighbors should they join U.S. efforts to further isolate Iran. 'Any country that becomes a partner in creating economic restrictions against us will be regarded by us as an enemy,' he stated in an interview with Iran's state broadcaster.

VIDEO (19:08): Watch CNBC's full interview with Treasury Secretary Scott Bessent on Squawk on the Street.
In a series of posts on X on Sunday, Iran's state-controlled Persian Gulf Strait Authority (PGSA) issued warnings that vessels violating its transit rules in the Hormuz Strait could face penalties, including 'fines, seizure, or confiscation' during future passages. Iranian Foreign Minister Abbas Araghchi has dismissed the prospect of new U.S. economic sanctions as a 'desperate' tactic, asserting that such U.S. actions are doomed to fail.
Tehran's parliament on Sunday approved a provision mandating that ships traversing the Hormuz chokepoint will pay for services provided by Tehran, according to local media reports, though this legislation still requires full parliamentary approval.
Amid these rising tensions, Omani Foreign Minister Sayyid Badr Albusaidi is scheduled to visit Tehran on Tuesday for bilateral discussions with his Iranian counterpart, Araghchi, as local media reported Monday. These talks are expected to continue discussions over the arrangement of the Strait of Hormuz, according to Iranian Foreign Ministry spokesperson Esmail Baghaei.
Despite the intensifying geopolitical climate, crude oil futures saw a pullback in Asian trading on Monday. West Texas Intermediate (WTI), the U.S. benchmark, declined by approximately 1.3% to $85.93 per barrel, while Brent crude, the international benchmark, fell 1.3% to $93.22 a barrel. The U.K. Maritime Trade Operations agency (UKMTO) reported no confirmed attacks in the Strait over the 48 hours leading up to Sunday, though it reiterated a warning about the 'continued risk of drifting or uncharted mines,' with designated mine danger areas remaining active.
