A portfolio manager is considering investing in a type of security that represents an ownership interest in a pool of mortgage-backed securities (MBSs), but with different payment priorities and interest rate sensitivities. Which of the following best describes this type of investment?
- AMortgage Pass-Through Certificate
- BAsset-Backed Security (ABS)
- CGeneral Obligation Bond
- DCollateralized Mortgage Obligation (CMO)
Show answer & explanationAnswer & explanation
Correct answer: D. Collateralized Mortgage Obligation (CMO)
A Collateralized Mortgage Obligation (CMO) is a complex debt security that pools mortgages and then slices them into different tranches, each with varying maturities, payment priorities, and interest rate sensitivities. This structure is designed to redistribute prepayment risk and offer investors different risk/return profiles. Mortgage Pass-Through Certificates are simpler, ABSs are broader, and General Obligation Bonds are unrelated municipal debt.
Why the other options are wrong
- A. Mortgage Pass-Through Certificates are simpler, representing direct ownership in a pool of mortgages, without the complex tranching of CMOs.
- B. Asset-Backed Securities (ABS) are a broader category that can include CMOs, but ABSs are backed by various assets (e.g., auto loans, credit card receivables), not exclusively MBSs like a CMO.
- C. General Obligation Bonds are municipal bonds backed by the full faith and credit of a municipality, completely unrelated to mortgage-backed securities.
Collateralized Mortgage Obligation (CMO)
A complex debt security that pools together mortgage-backed securities and separates them into different classes (tranches) with varying maturities, payment priorities, and interest rate sensitivities.
- Creates different tranches to redistribute prepayment risk.
- Each tranche has a distinct payment stream and risk profile.
- Can be highly sensitive to interest rate changes and prepayment speeds.
- Primarily used by institutional investors due to complexity.
Memory trick: CMOs slice mortgages into tranches, each with a different flavor of risk.