At least three banks seen central to Libor rigging | Reuters

At least three banks seen central to Libor rigging
| Reuters

Until now, most of the attention has involved traders at Barclays, which last month reached a $453 million settlement with U.S. and UK authorities for its role in the manipulation of rates. Now, it is becoming clear that traders from at least two other banks - UK-based Royal Bank of Scotland Group Plc and Switzerland's UBS AG - played a central role.
Among them, the three banks employed more than a dozen traders who sought to influence rates in either dollar, euro or yen rates. Some of the traders who are being probed have worked for several banks under scrutiny, raising the possibility that the rate fixing became more ingrained as traders changed jobs.