What is the primary purpose of having multiple tranches in a collateralized mortgage obligation?

• A. To eliminate interest payments
• B. To provide a single pooled maturity
• C. To create several classes with different maturities and cash flows
• D. To guarantee principal repayment

Answer: (C)

The main idea is that a collateralized mortgage obligation uses multiple tranches to tailor when cash is received and how much risk each investor bears. By dividing the mortgage pool’s principal and interest payments into several classes, the issuer can offer tranches with different maturities and cash-flow patterns. The payments flow through a waterfall so the most senior tranche is paid first, giving it more predictable, lower-risk cash flows, while more junior tranches absorb prepayment risk and potential losses, offering higher yields. This setup lets investors pick a tranche that matches their time horizon and risk tolerance, rather than forcing everyone into a single, uniform payoff. It’s not about eliminating interest payments, creating one fixed maturity, or guaranteeing principal; those aspects aren’t how CMOs operate.