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CFA Level I · CFA Level I Exam · Fixed-Income Securitization

In a sequential-pay collateralized mortgage obligation (CMO) with Tranches A, B and C, all principal repayments from the collateral, including prepayments, are most likely directed first to:

All principal payments, scheduled and prepaid, go first to Tranche A in a sequential-pay CMO until its balance is retired. Then Tranche B receives principal, followed by Tranche C. Principal is not shared pro rata, and the longest tranche is paid last.

  1. ATranche C, the tranche with the longest expected maturity
  2. BTranche A, until its principal is fully retiredCorrect
  3. CAll tranches in proportion to their outstanding balances

Explanation

In a sequential-pay CMO, tranches receive principal in order of seniority. Tranche A receives all scheduled principal and prepayments until it is fully paid, then Tranche B, then Tranche C. Pro rata distribution is not how sequential-pay structures work.

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