| XLQ | | TGP 500L Physical Basis LD1 | Natural Gas | IEPA | |
| XLN | | TGP 500L Physical Fixed Price Monthly | Natural Gas | IEPA | |
| XLM | | TGP 500L Physical Fixed Price Spot | Natural Gas | IEPA | |
| XLP | | TGP 500L Physical Gas Daily Monthly | Natural Gas | IEPA | |
| XLO | | TGP 500L Physical Gas Daily Spot | Natural Gas | IEPA | |
| XLR | | TGP 500L Physical Inside FERC | Natural Gas | IEPA | |
| XLW | | TGP 800L Physical Basis LD1 | Natural Gas | IEPA | |
| XLT | | TGP 800L Physical Fixed Price Monthly | Natural Gas | IEPA | |
| XLS | | TGP 800L Physical Fixed Price Spot | Natural Gas | IEPA | |
| XLV | | TGP 800L Physical Gas Daily Monthly | Natural Gas | IEPA | |
| XLU | | TGP 800L Physical Gas Daily Spot | Natural Gas | IEPA | |
| XLX | | TGP 800L Physical Inside FERC | Natural Gas | IEPA | |
| XXH | | TGP Z0 North Physical Basis LD1 | Natural Gas | IEPA | |
| XXI | | TGP Z0 North Physical Inside FERC | Natural Gas | IEPA | |
| XZJ | | TGP Z0 South Physical Basis LD1 | Natural Gas | IEPA | |
| XZK | | TGP Z0 South Physical Inside FERC | Natural Gas | IEPA | |
| XXE | | TGP Zone 0 North Physical Fixed Price Monthly | Natural Gas | IEPA | |
| XXD | | TGP Zone 0 North Physical Fixed Price Spot | Natural Gas | IEPA | |
| XXG | | TGP Zone 0 North Physical Gas Daily Monthly | Natural Gas | IEPA | |
| XXF | | TGP Zone 0 North Physical Gas Daily Spot | Natural Gas | IEPA | |
| XZG | | TGP Zone 0 South Physical Fixed Price Monthly | Natural Gas | IEPA | |
| XZF | | TGP Zone 0 South Physical Fixed Price Spot | Natural Gas | IEPA | |
| XZI | | TGP Zone 0 South Physical Gas Daily Monthly | Natural Gas | IEPA | |
| XZH | | TGP Zone 0 South Physical Gas Daily Spot | Natural Gas | IEPA | |
| XWI | | TGT Mainline Physical Basis LD1 | Natural Gas | IEPA | |
| XWF | | TGT Mainline Physical Fixed Price Monthly | Natural Gas | IEPA | |
| XWE | | TGT Mainline Physical Fixed Price Spot | Natural Gas | IEPA | |
| XWH | | TGT Mainline Physical Gas Daily Monthly | Natural Gas | IEPA | |
| XWG | | TGT Mainline Physical Gas Daily Spot | Natural Gas | IEPA | |
| XWJ | | TGT Mainline Physical Inside FERC | Natural Gas | IEPA | |
| XMX | | Transco 30 Physical Basis LD1 | Natural Gas | IEPA | |
| XMU | | Transco 30 Physical Fixed Price Monthly | Natural Gas | IEPA | |
| XMT | | Transco 30 Physical Fixed Price Spot | Natural Gas | IEPA | |
| XMW | | Transco 30 Physical Gas Daily Monthly | Natural Gas | IEPA | |
| XMV | | Transco 30 Physical Gas Daily Spot | Natural Gas | IEPA | |
| XMY | | Transco 30 Physical Inside FERC | Natural Gas | IEPA | |
| XVE | | Transco 85 Physical Basis LD1 | Natural Gas | IEPA | |
| XVF | | Transco 85 Physical Inside FERC | Natural Gas | IEPA | |
| X9I | | Transco Station 65 Pool (station 65 index) Physical Gas Daily Monthly | Natural Gas | IEPA | |
| X9H | | Transco Station 65 Pool (station 65 index) Physical Gas Daily Spot | Natural Gas | IEPA | |
| X9K | | Transco Station 65 Pool (station 65 index) Physical Inside FERC | Natural Gas | IEPA | |
| XJI | | Transco Station 65 Pool (zone 3 index) Physical Gas Daily Monthly | Natural Gas | IEPA | |
| XJH | | Transco Station 65 Pool (zone 3 index) Physical Gas Daily Spot | Natural Gas | IEPA | |
| XJK | | Transco Station 65 Pool (zone 3 index) Physical Inside FERC | Natural Gas | IEPA | |
| XJJ | | Transco Station 65 Pool Physical Basis LD1 | Natural Gas | IEPA | |
| XJG | | Transco Station 65 Pool Physical Fixed Price Monthly | Natural Gas | IEPA | |
| XJF | | Transco Station 65 Pool Physical Fixed Price Spot | Natural Gas | IEPA | |
| XVB | | Transco Station 85 (Zone 4) Physical Fixed Price Monthly | Natural Gas | IEPA | |
| XVA | | Transco Station 85 (Zone 4) Physical Fixed Price Spot | Natural Gas | IEPA | |
| XVD | | Transco Station 85 (Zone 4) Physical Gas Daily Monthly | Natural Gas | IEPA | |