Used to specify the type of position request being made.
| Code | Meaning |
|---|---|
| 0 | Positions |
| 1 | Trades |
| 2 | Exercises |
| 3 | Assignments |
| 4 | Settlement Activity |
| 5 | Backout Message |
| 6 | Delta Positions |
| 7 | Net Position |
| 8 | Large Positions Reporting |
| 9 | Exercise Position Reporting Submission |
| 10 | Position Limit Reporting Submission |