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SIE: Debt Securities
SIE practice questionhardCMOs

A support (companion) tranche in a CMO is MOST exposed to:

  1. APrepayment risk✓ Correct answer
  2. BInterest rate risk
  3. CCredit risk
  4. DInflation risk
Explanation

Why APrepayment risk

Support tranches absorb excess prepayments, making them most exposed to prepayment risk. All bonds have some interest rate/inflation risk, but structure increases prepayment exposure.

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