Settlement step in which a to-be-announced agency MBS trade is completed with eligible mortgage pools.
TBA settlement is the step in which a to-be-announced agency MBS trade is completed with eligible mortgage pools.
TBA settlement matters because the TBA market lets many agency MBS trades occur before the exact pools are named. Settlement is the point where that generic trade has to be resolved with pools that meet the trade terms.
It also matters because lender rate-lock and delivery teams manage borrower loans against market commitments. The borrower sees a rate lock and closing process; the lender may also be managing whether closed loans can be delivered into expected secondary-market channels.
Borrowers almost never see TBA settlement directly. It happens in the background after loans close or as lenders manage their locked pipeline against delivery expectations.
The term becomes practical when explaining why mortgage pricing, lock management, and loan delivery are tied to a large forward market rather than only to the lender’s balance sheet.
| Step | What happens |
|---|---|
| TBA trade | Agency MBS trade is agreed using generic terms |
| Pool identification | Eligible pools are selected for delivery |
| TBA settlement | Trade is completed using acceptable pools |
| Delivery management | Lenders and sellers resolve the expected position |
A lender has eligible agency mortgage production and a forward MBS position. At settlement, the trade must be completed using pools that satisfy the delivery terms. That completion point is TBA settlement.
TBA settlement differs from the To-Be-Announced Market because the market is the trading channel, while settlement is the completion step for a trade.
It differs from Specified Pool because specified pool is the identified pool, while settlement is the transaction step that uses eligible pools to complete the trade.
It also differs from TBA Pair-Off because settlement completes the position with delivery, while a pair-off offsets a position instead of delivering the expected security.