I Immediate or Cancel Order (IOC) In-the-Money Income Bonds Income Statement Income Stock Indenture Independent Brokers Index Individual Retirement Account (IRA) Inflation Inflation Rate Information Generation System (IGS) Initial Public Offering (IPO) Institutional Investors Integrate Technology Plan Network (ITPN) Integrated Computer Assisted Surveillance System (ICASS) Interest Interest Rate Intermarket Surveillance Group (ISG) Intermarket Surveillance Information System (ISIS) Intermarket Sweep Order Intermarket Trading System (ITS) Internalization International Capital Markets (ICM) International Organization of Securities Commissioners (IOSCO) Interrogation Device Investment Investment Bank Investment Banker Investment Company Investment Counsel Investment Grade Investment Portfolio Issue Issuer