| XKD | | Michcon Physical Basis LD1 | Natural Gas | IEPA | |
| XKA | | Michcon Physical Fixed Price Monthly | Natural Gas | IEPA | |
| XJZ | | Michcon Physical Fixed Price Spot | Natural Gas | IEPA | |
| XKC | | Michcon Physical Gas Daily Monthly | Natural Gas | IEPA | |
| XKB | | Michcon Physical Gas Daily Spot | Natural Gas | IEPA | |
| XKE | | Michcon Physical Inside FERC | Natural Gas | IEPA | |
| YBA | | Millennium East Pool Physical Basis LD1 | Natural Gas | IEPA | |
| YAZ | | Millennium East Pool Physical Fixed Price Monthly | Natural Gas | IEPA | |
| YAY | | Millennium East Pool Physical Fixed Price Spot | Natural Gas | IEPA | |
| YBC | | Millennium East Pool Physical Gas Daily Monthly | Natural Gas | IEPA | |
| YBB | | Millennium East Pool Physical Gas Daily Spot | Natural Gas | IEPA | |
| YBD | | Millennium East Pool Physical Inside FERC | Natural Gas | IEPA | |
| XDX | | Moss Bluff Inter Physical Basis LD1 | Natural Gas | IEPA | |
| XDR | | Moss Bluff Inter Physical Fixed Price Monthly | Natural Gas | IEPA | |
| XDS | | Moss Bluff Inter Physical Fixed Price Spot | Natural Gas | IEPA | |
| | Natural Gas Firm Physical, NYMEX LD1 | Natural Gas | IEPA | |
| XUZ | | NBPL Ventura Physical Basis LD1 | Natural Gas | IEPA | |
| XUW | | NBPL Ventura Physical Fixed Price Monthly | Natural Gas | IEPA | |
| XTZ | | NBPL Ventura Physical Fixed Price Spot | Natural Gas | IEPA | |
| XUY | | NBPL Ventura Physical Gas Daily Monthly | Natural Gas | IEPA | |
| XUX | | NBPL Ventura Physical Gas Daily Spot | Natural Gas | IEPA | |
| XWW | | NBPL Ventura Physical Inside FERC | Natural Gas | IEPA | |
| XJV | | NGPL Midcont Physical Basis LD1 | Natural Gas | IEPA | |
| XJS | | NGPL Midcont Physical Fixed Price Monthly | Natural Gas | IEPA | |
| XJR | | NGPL Midcont Physical Fixed Price Spot | Natural Gas | IEPA | |
| XJU | | NGPL Midcont Physical Gas Daily Monthly | Natural Gas | IEPA | |
| XJT | | NGPL Midcont Physical Gas Daily Spot | Natural Gas | IEPA | |
| XJW | | NGPL Midcont Physical Inside FERC | Natural Gas | IEPA | |
| YHK | | NGPL Nicor Physical Basis LD1 | Natural Gas | IEPA | |
| YHG | | NGPL Nicor Physical Fixed Price Monthly | Natural Gas | IEPA | |
| YHF | | NGPL Nicor Physical Fixed Price Spot | Natural Gas | IEPA | |
| YHI | | NGPL Nicor Physical Gas Daily Monthly | Natural Gas | IEPA | |
| YHH | | NGPL Nicor Physical Gas Daily Spot | Natural Gas | IEPA | |
| YHJ | | NGPL Nicor Physical Natural Gas Intelligence | Natural Gas | IEPA | |
| XVW | | NGPL STX Physical Basis LD1 | Natural Gas | IEPA | |
| XVT | | NGPL STX Physical Fixed Price Monthly | Natural Gas | IEPA | |
| XVS | | NGPL STX Physical Fixed Price Spot | Natural Gas | IEPA | |
| XVV | | NGPL STX Physical Gas Daily Monthly | Natural Gas | IEPA | |
| XVU | | NGPL STX Physical Gas Daily Spot | Natural Gas | IEPA | |
| XVX | | NGPL STX Physical Inside FERC | Natural Gas | IEPA | |
| XIX | | NGPL TXOK Physical Basis LD1 | Natural Gas | IEPA | |
| XIU | | NGPL TXOK Physical Fixed Price Monthly | Natural Gas | IEPA | |
| XIT | | NGPL TXOK Physical Fixed Price Spot | Natural Gas | IEPA | |
| XIW | | NGPL TXOK Physical Gas Daily Monthly | Natural Gas | IEPA | |
| XIV | | NGPL TXOK Physical Gas Daily Spot | Natural Gas | IEPA | |
| XIY | | NGPL TXOK Physical Inside FERC | Natural Gas | IEPA | |
| YHU | | NGPL-Nipsco Physical Basis LD1 | Natural Gas | IEPA | |
| YHQ | | NGPL-Nipsco Physical Fixed Price Monthly | Natural Gas | IEPA | |
| YHP | | NGPL-Nipsco Physical Fixed Price Spot | Natural Gas | IEPA | |
| YHS | | NGPL-Nipsco Physical Gas Daily Monthly | Natural Gas | IEPA | |