Answer: Mortgage pass-through security

## Explanation **Mortgage pass-through security** is most likely subject to the highest prepayment risk among the given options. ### Analysis of each option: 1. **Covered bond (Option A)**: - Covered bonds are debt securities backed by a pool of loans (typically mortgages) that remain on the issuer's balance sheet. - They have dual recourse: to the issuer and to the collateral pool. - Prepayment risk exists but is typically lower than mortgage pass-through securities because the issuer can manage the collateral pool and may have substitution rights. 2. **Mortgage pass-through security (Option B)**: - These are securities where mortgage payments (principal and interest) are passed through to investors. - They have the highest prepayment risk because homeowners can refinance their mortgages when interest rates fall, leading to early principal repayment. - This creates uncertainty about cash flow timing and duration for investors. 3. **Credit card receivable asset-backed security (Option C)**: - These are backed by credit card receivables. - They typically have very low prepayment risk because credit card balances are revolving and don't have fixed repayment schedules like mortgages. - Early repayments are less sensitive to interest rate changes compared to mortgages. ### Key Concept: **Prepayment risk** refers to the uncertainty about when borrowers will repay their loans early, which affects the timing and amount of cash flows to investors. Mortgage-backed securities are particularly vulnerable to prepayment risk because homeowners often refinance when interest rates decline. ### Why Option B is correct: - Mortgage pass-through securities directly expose investors to homeowner prepayment decisions - No credit enhancement or structural features to mitigate prepayment risk - Highly sensitive to interest rate changes - Unlike covered bonds, there's no issuer guarantee or collateral substitution to manage prepayment risk

Author: LeetQuiz .