The Iranian rial has dropped sharply on the open market since Sunday on speculation the head of the country's central bank could be sacked in a row over his performance that has exposed the country's political faultlines.
Reuters contacted currency traders who offered the rate of 35,400-35,550 to the dollar yesterday morning, little changed from Monday but down some 8 per cent from Sunday when it stood at about 33,000.
The bank governor Mahmoud Bahmani - appointed by the president Mahmoud Ahmadinejad in September 2008 - has faced strong criticism of his management of the rial following a slump in the currency last September during which 40 per cent of its value in a matter of days.
He also faces claims of involvement in the "midnight withdrawal" affair of March 2012, when the central bank withdrew hundreds of millions of dollars from commercial banks without authorisation.
On Monday, Iran's supreme audit court ruled that Mr Bahmani should be dismissed from his post, news that appeared to send the rial into a new dip.
Mr Bahmani offered to resign on Sunday, saying he wanted to retire but Mr Ahmadinejad. rejected the move.
Also on Sunday, parliament voted to investigate the central bank over its response to last year's currency crisis.
Analysts say the president cannot afford to show signs of weaknesses that could be used by his political rivals in parliament to undermine his position. Members of the supreme audit court are recommended and approved by parliament.
The court ruling - which is not a binding decision on the government - was issued because of Mr Bahmani's failure to attend a hearing and explain the reasoning behind the March 2012 withdrawals, Mehr news agency reported.
A separate report by the state news agency said that the governor had 20 days to appeal against it.
The central bank has said no such ruling was issued by the court and denies charges of any wrongdoing over the withdrawals.
Legislators have accused the central bank of economic mismanagement and failing to provide the market with enough dollars to meet demand, helping to drive down the rial.
To stem the September plunge in the currency, the government used security forces to arrest currency dealers and attempted to impose its own exchange rates.
The tough stance has made it difficult for many dealers to continue trading. Those that continue risk arrest and imprisonment as well as losses because of unpredictable swings in the market rate.