Authorities consider stripping bankers group of its role regarding benchmark rate.

Individual banks were able to manipulate key rate; no need for conspiracy.

Individual banks were able to manipulate key rate; no need for conspiracy.

Former Barclays CEO blames competitors and says regulators failed to act promptly.

Former Barclays CEO blames competitors and says regulators failed to act promptly.

His departure follows bank's $455 million fine last week for rigging Libor.

His departure follows bank's $455 million fine last week for rigging Libor.

Investors say new CFTC rules arent enough to salvage discredited benchmark.