LONDON (Reuters) - U.S. investment bank Goldman Sachs
The move follows similar steps this week by JP Morgan Chase
Goldman's move extends beyond foreign exchange to its entire securities division, which includes equities, commodities and fixed income.
Bilateral communications via these chatrooms will still be permitted, the source said.
Chatrooms have been a focus for regulators investigating possible rigging in foreign exchange, the world's largest market.
They also featured prominently in a five-year probe into the rigging of a key interest rate known as the London interbank offered rate, or Libor, which has already cost banks billions of dollars in settlements.
Traders at banks and financial institutions often communicate with each other online via third-party services including Bloomberg LP and Thomson Reuters
(Reporting by Jamie McGeever; editing by Andrew Roche)