Input Bitfields Per Message
| Entry | Description |
|---|---|
| R | Indicates that the field must be specified for a message |
| O | Indicates that the field can be specified for a message |
| - | Indicates that the field cannot be specified for a message |
| (Blank) | Indicates that the field is not used by Cboe Options and cannot be specified for a message |
Input messages containing invalid fields (i.e., Blank) will be rejected. In the case of rejected input messages, the associated Reject message sent back to the customer will contain a RejectReason code non-optional field (See Order Reason Codes) and a Text non-optional field containing descriptive text.