Overview of TBA vs. Note Rate Hedging

Hedging your mortgage pipeline with TBA MBS is a popular strategy due to the correlation between the loan assets in your open pipeline and mortgage-backed securities. In TBA trading, two counterparties agree on the forward sale or purchase of agency MBS for settlement on a future date. The trade specifies six key terms, which include maturity, coupon, issuer, price, par amount, and settlement date. However, they are not the specific mortgage pools to be delivered. On the settlement date, the seller selects which eligible securities to deliver, allowing for flexible, standardized forward trading. This structure makes TBA contracts highly liquid and closely aligned with the characteristics of newly originated conforming mortgages. 

Hedging a mortgage pipeline using mandatory commitments is a method that focuses on managing interest rate risk based on a range of note rates associated with loans in the pipeline. Unlike TBA MBS hedging, which aligns exposure to standardized mortgage-backed securities prices, note rate hedging directly matches the expected behavior of loans at the individual note rate level, offering a more granular approach to risk management. In this strategy, lenders analyze their locked loan pipeline and group loans by note rate, often referred to as “note rate buckets.” Each bucket’s exposure is then offset using financial instruments such as with forward contracts. Depositories, such as community banks and credit unions, often favor a simplified agency forward structure. 

While both note rate hedging and TBA MBS hedging aim to protect a lender’s mortgage pipeline from adverse interest rate movements, the two approaches differ significantly in structure, precision, and operational complexity. Understanding these differences is essential for selecting a hedging strategy that aligns with a lender’s size, risk profile, and secondary marketing objectives. TBA MBS hedging involves taking positions in standardized To-Be-Announced mortgage-backed securities. These securities are traded in specific coupon increments (e.g., 5.5%, 6.0%) and represent pools of conforming mortgage loans that will be delivered at a future date. In contrast, note rate hedging operates at a more granular level by aligning hedge coverage directly with the note rates of the loans in the pipeline. Rather than aggregating exposure into broad TBA coupon buckets, this method assigns hedges based on specific loan pricing behavior.