medium · Asset-Backed Securities waterfalls

How does the 'Step-down' date in a Home Equity ABS affect the credit support of the senior tranche in a successful performance scenario?

  1. It forces a mandatory redemption of the entire senior tranche at par once the collateral pool balance fully amortizes downward.
  2. It allows the subordinate classes to receive principal, which prevents the senior tranche's relative credit support from growing indefinitely.
  3. It triggers an immediate release of all remaining cash held in the reserve account, sending it back directly to the deal's originator sponsor.
  4. It reduces the senior bond's stated coupon rate so that it precisely tracks the ongoing decline in the pool's weighted average coupon, or WAC, over time.

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