The embargo meant to starve Iran just made its oil expensive

By Friday morning, Brent crude traded at $93.28 a barrel, close to a one-month high, as the price of the very commodity Washington targeted refused to fall.

OilPrice.com reported on August 21 that Iranian crude, traditionally priced below Brent to navigate sanctions, had shifted from trading three dollars beneath Brent to two dollars above it. Iran's war chest now enjoys a premium, paid by the embargo.

President Donald Trump labeled Wednesday as "economic D-Day" against Iran, warning on Truth Social that any nation offering Iran a financial lifeline would face "tremendous" repercussions, as Treasury Secretary Scott Bessent reiterated the following day that secondary sanctions would reach countries still trading with Tehran, according to Al Jazeera on August 21. Any dollar added through scarcity engineered by Washington appears first on the invoice of those still importing Iranian oil.

A U.S. maritime blockade has stopped new Iranian shipments from reaching Asia and drained Iran's floating storage off Malaysia and Singapore, meaning the few barrels that reach market are met by a shortage among Chinese refiners. Scarcity, the chosen U.S. strategy, dictates the price. With Chinese "teapot" refiners turning to Brazilian and Iraqi crude, OilPrice.com noted on August 21 that the premium applies squarely to the sanctioned seller.

Each actor seeks a different outcome. President Trump needs the conflict resolved before November's midterms without conceding defeat, and economic strangulation is the go-to measure when both negotiation and escalation are off the table, as the New York Times described on August 19. Bessent's priority is supporting the Treasury market as U.S. debt crosses $40 trillion—two years ahead of projections—Al Jazeera reported on August 21.

Ali Khamenei’s administration must keep oil flowing to sustain a war economy, learning that blockades convert patience into higher prices. Beijing wants cheap oil and is buying it wherever available—anywhere but the Gulf at current prices. Abbas Araghchi argued the D-Day speech was an American diversion, and this week’s bond market movements suggest he was not wrong, as Al Jazeera noted on August 21.

The catalyst was Wednesday’s announcement, but deeper forces are at play: U.S. strikes began February 28, closing the Strait of Hormuz and slashing traffic from 130 ships daily to single digits, Kpler transit figures cited by Al Jazeera on August 21 showed. Frederic Schneider of the Middle East Council on Global Affairs told Al Jazeera on August 21 that the Energy Information Administration does not expect Gulf output to return near pre-conflict levels until early 2027. The price of every barrel globally was transformed not by a single speech, but by the enduring closure.

Blockades raise prices

The Union blockade of Confederate cotton serves as precedent—blockades drive up the prices of the very goods they restrict, benefiting holders even as their economies hollow out. Richmond financed itself for years on cotton London couldn’t get elsewhere. The collapse only began when buyers found substitutes: Egyptian and Indian crops planted to fill the shortfall. That process is repeating as Chinese refiners move to Brazil and Iraq, according to OilPrice.com on August 21.

The historical counterexample cuts the other way: in 2018 and 2019, coordinated buyer compliance during another maximum-pressure campaign tanked Iranian exports regardless of price. Sanctions proved effective when customers conformed. This time, the major customer does not.

Collecting the rents

First order effects: Brent edged toward $94, Asian LNG rose to $24 per million British thermal units, and supertanker freight costs reached record levels, OilPrice.com listed on August 21. Second order: the 30-year Treasury yield topped 5.25 percent for the first time in two decades, and Bessent’s emergency initiative doubling buybacks of long-dated debt failed to stabilize markets, Al Jazeera reported on August 21. Third order. With the Fed unable to cut rates amid an oil shock, gasoline costs became a campaign topic, prompting Trump to tell rallies that “a tiny little bit more for your gasoline” was the price of policy, according to Al Jazeera the same day.

Abu Dhabi cut trade with Iran after missile attacks nearby, but ADNOC has launched nine spot crude tenders since June, and Murban crude reached a four-month high of $103.50, OilPrice.com reported on August 22. Baghdad expanded export deals around Hormuz, aspiring to move ten million barrels daily, OilPrice.com wrote on August 21. Saudi Aramco resumed sending its VLCCs through Hormuz after pausing for three weeks, charging record rates for the risk, OilPrice.com added on August 18. The Gulf states bear the risk, and reap the rewards.

If this trajectory holds, China’s teapot refiners will continue paying above-market rates for scarce Iranian cargoes, global floating storage will dwindle, and Brent may approach $100 through September as Washington opts for enforcement over diplomacy. Iran, meanwhile, has refused U.S. negotiations until issues surrounding Hormuz are resolved, seeking talks with Oman instead, Al Jazeera reported on August 21. The opposite outcome would see China imposing secondary sanctions on its own institutions, swiftly erasing the Iranian premium, or an Omani-mediated deal reopening Hormuz and knocking ten dollars off Brent—faster than Washington could manage by policy alone.

This week American drivers pay higher gas prices and bondholders face a thirty-year yield stuck above five percent, while Treasury struggles to steady the curve even with doubled buybacks that have not reassured traders, Al Jazeera reported on August 21. The beneficiaries are the tanker owners collecting record freight, the suppliers from Brazil to Basra, and Iran’s government, whose remaining barrels now command a rare premium, OilPrice.com wrote on August 21.

A siege that leaves the target richer is not true economic pressure. It is a subsidy, flown under another country’s flag.