| TOJ | | ICE Three Month TONA Indexed Futures | Short Term Interest Rates | IFLL | |
| ZAR | | ICE Three Month ZARONIA Futures | Short Term Interest Rates | IFLL | |
| SR3 | | ICE Three-Month SOFR Index Future | Short Term Interest Rates | IFUS | |
| 30C | | ICE U.S. Conforming 30-year Fixed Mortgage Rate Lock Weighted APR Index Futures | Mortgage Rates | IFUS | |
| 30J | | ICE U.S. Jumbo 30-year Fixed Mortgage Rate Lock Weighted APR Index Futures | Mortgage Rates | IFUS | |
| ES3 | | ICNL Three Month ESTR Indexed Futures | Short Term Interest Rates | IFLL | |
| J | | ICNL Three Month EURIBOR® Futures | Short Term Interest Rates | IFLL | |
| IMI | | IMI PLC | Single Stock Options | IFLO | |
| IMP | | Imperial Brand PLC | Single Stock Options | IFLO | |
| INR | | Indivior PLC | Single Stock Options | IFLO | |
| IFA | | Informa Plc | Single Stock Options | IFLO | |
| 8I9 | | Intel Corp - STND Future | Mini Stock Futures | IFLO | |
| IHG | | InterContinental Hotels Group PLC | Single Stock Options | IFLO | |
| ICV | | Intermediate Capital Group (Std Option/Amer/Dlv) | Single Stock Options | IFLO | |
| AWS | | International Consolidated Airlines Group SA | Single Stock Options | IFLO | |
| 8WS | | International Consolidated Airlines SA Mini | Mini Single Stocks | IFLO | |
| SMN | | International Paper Company | Single Stock Options | IFLO | |
| ITR | | Intertek Group | Single Stock Options | IFLO | |
| IVS | | Investec PLC - STND OPT | Single Stock Options | IFLO | |
| IRB | | Iroquois (Into) Basis (Platts) Future | Natural Gas | IFED | |
| IRI | | Iroquois (Into) Index (Platts) Future | Natural Gas | IFED | |
| IRS | | Iroquois (Into) Swing (Platts) Future | Natural Gas | IFED | |
| IZB | | Iroquois-Z2 Basis (Platts) Future | Natural Gas | IFED | |
| IZI | | Iroquois-Z2 Index (Platts) Future | Natural Gas | IFED | |
| IZS | | Iroquois-Z2 Swing (Platts) Future | Natural Gas | IFED | |
| ISD | | Iso Butane, OPIS Conway In-Well Balmo Future | Natural Gas Liquids | IFED | |
| ISP | | Iso Butane, OPIS Mt. Belvieu Non-TET Balmo Future | Natural Gas Liquids | IFED | |
| ISQ | | Iso Butane, OPIS Mt. Belvieu TET, Fixed Price Future (Balmo) | Natural Gas Liquids | IFED | |
| ICO | | ISO New England Connecticut Day-Ahead Off-Peak Fixed Price Future | Electricity | IFED | |
| ICP | | ISO New England Connecticut Day-Ahead Peak Fixed Price Future | Electricity | IFED | |
| IED | | ISO New England Maine Day-Ahead Off-Peak Fixed Price Future | Electricity | IFED | |
| IEB | | ISO New England Maine Day-Ahead Peak Fixed Price Future | Electricity | IFED | |
| POP | | ISO New England Massachusetts Hub Day-Ahead Off-Peak Daily Fixed Price Future | Electricity | IFED | |
| NOP | | ISO New England Massachusetts Hub Day-Ahead Off-Peak Fixed Price Future | Electricity | IFED | |
| NO2 | | ISO New England Massachusetts Hub Day-Ahead Peak 2x16 Fixed Price Future | Electricity | IFED | |
| EDP | | ISO New England Massachusetts Hub Day-Ahead Peak Daily Fixed Price Future | Electricity | IFED | |
| NEZ | | ISO New England Massachusetts Hub Day-Ahead Peak Daily Mini Fixed Price Future | Electricity | IFED | |
| NEP | | ISO New England Massachusetts Hub Day-Ahead Peak Fixed Price Future | Electricity | IFED | |
| NOH | | ISO New England Massachusetts Hub Real-Time Off-Peak Daily Fixed Price Future | Electricity | IFED | |
| NOG | | ISO New England Massachusetts Hub Real-Time Off-Peak Fixed Price Future | Electricity | IFED | |
| NMD | | ISO New England Massachusetts Hub Real-Time Peak Daily Fixed Price Future | Electricity | IFED | |
| NOF | | ISO New England Massachusetts Hub Real-Time Peak Fixed Price Future | Electricity | IFED | |
| IND | | ISO New England NE Massachusetts Day-Ahead Off-Peak Fixed Price Future | Electricity | IFED | |
| INB | | ISO New England NE Massachusetts Day-Ahead Peak Fixed Price Future | Electricity | IFED | |
| IHD | | ISO New England New Hampshire Day-Ahead Off-Peak Fixed Price Future | Electricity | IFED | |
| IHB | | ISO New England New Hampshire Day-Ahead Peak Fixed Price Future | Electricity | IFED | |
| RIZ | | ISO New England Rhode Island Day-Ahead Off-Peak Fixed Price Future | Electricity | IFED | |
| RIY | | ISO New England Rhode Island Day-Ahead Peak Fixed Price Future | Electricity | IFED | |
| IMD | | ISO New England SE Massachusetts Day-Ahead Off-Peak Fixed Price Future | Electricity | IFED | |
| IMB | | ISO New England SE Massachusetts Day-Ahead Peak Fixed Price Future | Electricity | IFED | |