Investment Bank (IB) A financial intermediary that performs a variety of services. This includes underwriting, acting as an intermediary between an issuer of securities and the investing public, facilitating mergers and other corporate reorganizations, and also acting as a broker for institutional clients. Investopedia Says: The role of the investment bank begins with pre-underwriting counseling and continues after the distribution of securities in the form of advice. Related Terms: 3-6-3 Rule Gray List Investment Banker Lead Underwriter Nominated Advisor - NOMAD Pathfinder Prospectus Permissible Non-Bank Activities Private Banking Teaser Underwriting |