Iran’s rial falls to record low

Iran’s currency has weakened to an all-time low against the dollar amid US efforts to cripple the country’s economy after almost six months of war.

US Treasury secretary Scott Bessent is due to announce new US sanctions against Iran at a press conference scheduled for 1pm EDT, which is 6pm London time.

The rial was trading at 1.992m per dollar on the unregulated market on Monday, according to Bloomberg News, which cited data from tracking website Bonbast – down 4.5% since Donald Trump announced a “crushing economic operation” against Tehran last week.

Another unofficial tracking site, TGJU, said the rial passed the 2m threshold on Sunday but closed lower.

The currency is under pressure from US efforts to isolate Iran by threatening the country’s few remaining trade partners while blockading its main ports in the Persian Gulf and choking off oil exports.

Last week, Iran’s central bank governor, Abdolnaser Hemmati, said its crude exports have “virtually stopped.” The United Arab Emirates, one of Tehran’s main trading partners, said last week that it had suspended all financial transactions with Iran until further notice.

Warning of an “economic D-Day,” Bessent wrote in the Financial Times today:

double quotation markAt dawn begins an economic D-Day — the single greatest financial offensive ever marshalled against an adversary.

Our objective is to sever every economic lifeline that sustains the tyrannical regime until Tehran stands alone.

Iran’s top financial newspaper, Donya-e Eqtesad, said the currency’s drop was driven by disruption to foreign-exchange transfers and declining exports alongside increased import demand and rising inflation expectations.

A man who runs a mobile currency exchange office is counting money in Tehran, Iran on 6 October 2025.
A man who runs a mobile currency exchange office is counting money in Tehran, Iran on 6 October 2025. Photograph: Anadolu/Getty Images
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Graeme Wearden

Graeme Wearden

US borrowing cost have dipped a little more following a report that Treasury secretary Scott Bessent could boost his bond-buying firepower.

CNBC are reporting that the Treasury could use its near $1tn General Account to help fund its recently announced plans to increase purchases of government bonds, according to two senior Treasury officials.

The TGA is effectively a rainy-day fund held at the Federal Reserve, funded by existing tax collections. Bessent has built up the TGA to around $950bn.

Last week, Bessent doubled the cap on the government’s long-term debt buyback program from $2bn to $4bn, and has hinted it could be expanded further.

The prospect of the TGA’s reserves being deployed to buy US debt has pushed down the yield, or interest rate, on 10-year bonds by 3 basis points to 4.7%, while 30-year Treasury yields are down 4bps to 5.235%

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