The US Department of Justice is set to visit London and interview a group of current and former traders at banking giant HSBC, as part of an ongoing criminal investigation into allegations of currency market manipulation.
According to sources cited by Reuters, US prosecutors are set to touchdown on British soil within the next few weeks and will use the time to gather evidence, to determine whether to file criminal charges against individual bankers.
The sources made it clear that the interviews may not lead to any criminal charges against individual bankers or lenders.
The DoJ and HSBC declined the comment.
On 13 November, the UK's Financial Conduct Authority (FCA) and Commodity Futures Trading Commission (CFTC) fined five banks - Citibank, HSBC, JPM, the Royal Bank of Scotland (RBS) and UBS - a combined total of $3.4bn (£2.1bn, €2.7bn) for their role in the manipulation of the foreign exchange market.
Traders from the five banks shared information about currency orders using laddish pseudonyms and shared virtual high-fives.
HSBC traders were among those operating in private chatrooms, transcripts from which were later described by the FCA as "[putting] their banks' interests ahead of those of their clients".
Comments like "lets double team em", "well done lads" and "yeah baby" litter discussions that at time appear to be exercises in back-slapping.