A mortgage pass-through security is a type of structured product that is created when a pool of mortgages is assembled to create a marketable product, often referred to as participation certificates. The holder of these certificates, in this case, Troy Dean, is entitled to a pro-rata share of all principal and interest payments made on the pool of mortgage loans. This pool can consist of several thousands of mortgages. The key characteristic of a mortgage pass-through security that matches Dean's investment is the entitlement to a proportionate share of all payments made on the underlying mortgages.

Choice B is incorrect. A Collateralized Mortgage Obligation (CMO) is a type of mortgage-backed security that creates separate pools of pass-through rates for different tranches of investors with varying levels of risk. Unlike the mortgage pass-through, where Dean has a proportionate share in all principal and interest payments, CMOs have different tranches that receive these payments based on their level of risk.

Choice C is incorrect. Covered bonds are corporate debt securities backed by cash flows from mortgages or public sector loans. They are similar to asset-backed securities created in securitization, but covered bond assets remain on the issuer's consolidated balance sheet. This differs from Dean's investment where he receives a proportionate share in all principal and interest payments made on the underlying mortgage loans.

Choice D is incorrect. Collateralized Debt Obligations (CDOs) are structured financial products that pool together cash flow-generating assets and redistribute those cash flows into various tranches with different risk profiles. The key difference here is that CDOs can include various types of underlying assets such as mortgages, corporate debt, or credit card debt whereas Dean's investment specifically involves underlying mortgage loans.

Things to Remember

• Mortgage pass-through securities are often agency-backed, with an explicit or implicit U.S. federal guarantee, leading to minimal default risk for the investor.
• The cash flows from mortgage pass-through securities depend on both amortization schedules and voluntary prepayments from the mortgagors, creating variability in