With the upcoming plan to move give-up processing from the OTIS System to the ACT 2.0^TM System, firms will need to be prepared to handle the replacement of MQM Real Time messages with Give-Up Application Program Interface (GAPI) messages. Listed below are the GAPI equivalents to current Real Time MQM messages as well as new messages exclusive to GAPI. The listing is being provided to help firms assess the impact of changes they will need to make to process GAPI messages.

GAPI Messages that have Real Time Feed Equivalents:
	• Confirms and dups for:
		• Allocations (GAC/GAD)
		• Claims (GCC/GCD)
		• Initiate Reversal (GIC/GID)
	• Alerts to the executing firm:
		• Claims (GCA)
		• Allocation Reject (GJA)
		• Confirm Reversal (GVA)
GAPI Messages that have NO Real Time Feed Equivalents:
	• All summary messages (GSA, GSC, GSD)
	• Confirms and dups for:
		• Allocation Reject (GJC/GJD)
		• Confirm Reversal (GVC/GVD)
	• Alerts to the carrying firm:
		• Allocations (GAA)
		• Initiate Reversal (GIA)
	• All error messages

Trex Record Differences:

Field	GAPI	RTF
Trex Blocks	Always Main, M2. A2 for all except summary messages. Optional M1 for errors and certain messages.	Always Main, A2, M2
Message Identifier (Main Block cols 1 – 3)	Various, beginning with G	‘1’ – Futures Clearing & Books ‘J’ – Futures Clearing Only ‘H’ – Options
Message Length (Main Block cols 21 – 24)	Various	Always 245
Trade Id Source Code (Main Block cols 146 – 148)	‘GAP’	‘DUG’
M2 Subsystem (M2 Block cols 6 – 8)	‘GAP’	‘DUG’
Record Id on Allocation Add Messages – GAC/GAD Action A (Main Block cols 140 – 145) (M1 Block cols 110 – 115)	Main block record id contains summary id. M1 block contains allocation id.	Main block record id contains allocation id. M1 block not used.
Record Id on Claim Add Messages – GCC/GCD Action A (Main Block cols 140 – 145) (M1 Block cols 110 – 115)	Main block record id contains allocation id. M1 block contains claim id	Main block record id contains claim id. M1 block not used.

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