Post Trade allocation for Repo (repurchase agreement)

1

Hello team,

I have a question about post-trade allocation just want to confirm if my understanding is corect.

For instance, there is a single RFQ/Order of a Repo (with 3 bonds defined as specific collaterals) been traded with the counterparty. Hence, buyside would like to allocate this trade into two accounts with different amount:

Account 1:

  • BondA (2M)
  • BondB (2M)
  • BondC (2M)

Account 2:

  • BondA(1M)
  • BondC(3M)

Since the collaterals (bonds) are defined under the UndInstrmtGrp group, while the Accounts are defined under the AllocGrp, I just can’t see the way how a single message can be used.

So it will be great if the team can suggest the best practice for handling it? It seems that we can only handle it using multiple messages, either per Account or per bonds? Please kindly advise.

Thanks!