🏦LTB
SIE: Debt Securities
SIE practice questionhardCMOs

Which tranche in a CMO structure is MOST subject to prepayment risk?

  1. AThe planned amortization class (PAC) tranche
  2. BThe shortest maturity (fast-pay) tranche✓ Correct answer
  3. CThe support (companion) tranche
  4. DThe longest maturity (last-pay) tranche
Explanation

Why BThe shortest maturity (fast-pay) tranche

Short, fast-pay tranches receive principal first and thus face high prepayment risk. PAC tranches are designed to be more stable; companion and last-pay are exposed to extension risk.

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