A broker who acts as an intermediary between market-makers who wish to improve their book positions by selling or buying securities, without revealing their identities to other market-makers.
A broker who is used by third parties to negotiate and execute transactions on the money and capital markets. Strictly agents, IDB's do not trade for their own accounts. Sometimes referred to as 'money brokers' in the U.K.
A specialist broker who acts as an intermediary between market-makers who wish to buy or sell securities to improve their book positions, without revealing their identities to other market-makers.