The European Commission is set to make interest rate-rigging a criminal act in the wake of the Libor scandal.
In amendments to the Market Abuse Directive to be announced on Thursday, it is expected that the commission president, Jose Manuel Barroso, and financial services commissioner, Michel Barnier, will ensure that anyone caught rate-rigging will be jailed.
There has been frustration that the UK's Financial Services Authority and the Serious Fraud Office have appeared toothless over the Libor manipulation, which helped Barclays traders hide losses and improve their financial positions.
Thus far, only Barclays has been fined, £291 million ($571 million), though Financial Services Authority chairman Lord Turner is preparing a hard-hitting speech attacking the City's debased culture tomorrow.
The European Parliament is also tabling amendments that will focus on making Libor and other potential areas for rigging, such as currency trading, criminal acts.