According to a report on the BBC website, six banks have been collectively fined £2.6bn by UK and US regulators over their traders' attempted manipulation
of foreign exchange rates.
HSBC, Royal Bank of Scotland, Swiss bank UBS and US banks JP Morgan Chase, Citibank and Bank of America have all been fined.
A separate probe into Barclays is continuing. The fines were issued by the UK's Financial Conduct Authority (FCA) and two US regulators.
The country's Commodity Futures Trading Commission (CFTC) issued fines of $1.4bn to five banks, while the Office of the Comptroller of the Currency (OCC)
added $950m in further fines to three lenders.
Separately, the Swiss regulator, FINMA, has penalised UBS 134m Swiss francs.
Barclays, which had been expected to announce a similar deal to the other banks, said it would not be settling at this time.
FCA boss Martin Wheatley told the BBC: "This isn't the end of the story." "The individuals themselves will
face the consequences," he said.
Several senior traders at the banks have already been put on leave and the Serious Fraud Office is in the process of preparing potential criminal charges against
those alleged to have masterminded the scheme.
The fines follow a 13-month investigation by regulators into claims that the foreign exchange market - in which banks and other financial firms buy and sell currencies between one another - was being rigged.