Sub-type qualification/identification of the SecurityType (e.g. for SecurityType="REPO"), or the CFICode if SecurityType is not specified. If specified, SecuirtyType or CFICode is required.

Example Values:

General = General Collateral (for SecurityType=REPO)

For SecurityType="MLEG" markets can provide the name of the option or futures strategy, such as Calendar, Vertical, Butterfly, etc.

NOTE: Additional values may be used by mutual agreement of the counterparties