Effective with the launch of the new ACS system on January 10, 2003, we will be implementing a new give-up API message type designation of �GUC� to accommodate sub-allocations and third-party give-ups. 

The examples below help to illustrate when the new message will be created:

• Marking an accepted give-up for sub-allocation

When the carry firm marks an accepted give-up trade for sub-allocation or to be given up to another firm, the following message types are created:

�         GUC: sent to carrying firm, confirming the intent to sub-allocate

�         GSA: sent to carrying firm, acknowledging creation of the order

GUS-API can now receive a GA message, allowing the carry firm (now executing firm) to allocate.

• Sub-allocating accepted give-ups and specifying sub-allocation accounts

When the carry firm (now executing firm) accepts a give-up and allocates part or all of the accepted give-up to a different account within the same firm, the following messages are created:

�         GUC: sent to carrying firm (now executing firm), confirming the intent to sub-allocate

�         GSA: sent to carrying firm (now executing firm), acknowledging creation of the order

�         GAC: sent to carrying firm (now executing firm), informing of allocation

�         GAA: sent to carrying firm (now executing firm), shows new allocation account

GUS-API can now receive a GC message to accept a sub-allocated give-up.

• Message types created when using the auto-accept rule

When the Carry firm (now executing firm) allocates part or all of accepted give-up to different accounts, and auto-accept rules are in place, the following messages are created.

�         GUC: sent to carrying firm (now executing firm), confirming the intent to sub-allocate

�         GSA: sent to carrying firm (now executing firm), acknowledging creation of the order

�         GAC: sent to carrying firm (now executing firm), informing of the allocation

�         GAA: sent to carrying firm (now executing firm), showing the new allocation account

�         GCA: sent to carrying firm (now executing firm), showing the allocation acceptance

�         GCC: sent to carrying firm (now executing firm), showing the allocation acceptance

• Marking an accepted give-up for third-party Give-up

When the carry firm (now executing firm) accepts a give-up, and allocates part or all of the accepted give-up to a different firm and account, the following message types are created:

�         GUC: sent to carrying firm (now executing firm), confirming the intent to sub-allocate

�         GSA: sent to carrying firm (now executing firm), acknowledging creation of the order

�         GAC: sent to carrying firm (now executing firm), informing of allocation

�         GAA: sent to new carrying firm (third-party firm), shows new allocation firm and account

GUS-API can now receive a GC message to accept sub-allocated give-up.

• Message types created when using the auto-accept rule

When carry firm (now executing firm) allocates part or all of an accepted give-up to a different firm and account, and auto-accept rule in place, the following messages are created:

�         GUC: sent to carrying firm (now executing firm), confirming the intent to sub-allocate

�         GSA: sent to carrying firm (now executing firm), acknowledging creation of the order

�         GAC: sent to carrying firm (now executing firm), informing of allocation

�         GAA: sent to new carrying firm (third-party firm), shows new allocation firm and account

�         GCA: sent to carrying firm (now executing firm), shows allocation acceptance

�         GCC: sent to new carrying firm (third-party firm), shows new allocation firm and account

To view a flow chart of the above examples, click on the following link:  ACS Sub-allocation/Third-party Give-up Message Function.

If you have any questions, please contact Client Management at one of the numbers below:

Contact:                                    System:                        Number:                        E-mail:

Farris Oweimrin                         FEC/ACS                      312-648-4780       foweimri@cme.com

Mahmoud Ajamia                       Portal Access                312-634-1595       majamia@cme.com

Stacy Jurek                               Portal Access                312-338-2088       sjurek@cme.com

Thank you!