Initial research article published September 26, 2026.
First principles
A securitization transfers a pool of receivables to a trust or special-purpose vehicle that issues notes. Borrower cash collections flow through a contractually specified waterfall: taxes and trust expenses, servicing, hedge or swap amounts when applicable, note interest, note principal, reserve replenishment and finally residual distributions. Losses usually hit excess spread, reserves, overcollateralization and subordinated tranches before senior notes, subject to the deal documents.
Worked monthly example — hypothetical
| Item | Amount | Waterfall effect |
|---|---|---|
| Opening receivables | $100.0m | Collateral pool |
| Finance charges / fees | $1.80m | Gross portfolio yield |
| Principal collections | $7.00m | Reinvest or pay notes depending on period |
| Servicing + trust costs | ($0.35m) | Paid before investor residual |
| Note interest | ($0.45m) | Senior obligation |
| Charge-offs | ($0.70m) | Absorbed by enhancement per documents |
| Excess spread before reserve | $0.30m | May replenish reserve or build overcollateralization |
| Residual distribution | $0.10m | After required targets are satisfied |
Triggers and liquidity
Triggers convert performance deterioration into cash-control changes. A three-month excess-spread breach, delinquency test or seller/servicer event can trap cash, accelerate note amortization or end a revolving period. This protects senior investors but can reduce originator liquidity exactly when credit weakens. The economic question is therefore not only the coupon. It is advance rate, required enhancement, residual timing, eligibility rules, hedge costs, triggers and the probability that cash becomes trapped.
Common misconception
Selling receivables does not necessarily eliminate risk. The sponsor may retain residuals, subordinated notes, representations and warranties, servicing duties, repurchase exposure or implicit-support pressure. Analysts should read pool definitions, delinquency and charge-off definitions, seasoning, payment rates, yield, excess spread and trigger cushions before comparing deals.