Securitisation Fundamentals
The complete guide to how securitisation works—from originating assets to issuing securities and beyond.
What is Securitisation?
Securitisation is financial alchemy. It takes thousands of individual loans—each with its own borrower, terms, and risks—and converts them into standardised securities with defined risk profiles that institutional investors can analyse, price, and trade.
At its core, securitisation pools financial assets—such as loans, receivables, or leases—and issues securities backed by those assets' cash flows. It transforms illiquid individual assets into tradeable securities that can be sold to capital markets investors.
The technique originated in the US mortgage market in the 1970s and has since expanded to encompass virtually every asset class that generates predictable cash flows: auto loans, credit cards, student loans, equipment leases, trade receivables, and more.
Securitisation: End-to-End Process
Visual walkthrough of the securitisation process from asset origination to securities issuance.
[0:00-0:04] Title: "Securitisation Fundamentals" [0:04-0:08] Subtitle: "Transforming loans into tradeable securities" [0:08-0:25] Process flow diagram appears: Step 1: Originator (Blue) creates loans Step 2: Loans sold to SPV (Gold) Step 3: SPV issues securities to Investors (Purple) [0:25-0:45] Tranching animation: Pool of assets splits into: - AAA Tranche (top, largest) - "First to be paid" - AA Tranche (middle) - A Tranche (middle) - BBB Tranche (smaller) - Equity/First Loss (bottom, smallest) - "First to absorb losses" [0:45-1:05] Cash flow arrows: - Borrowers pay into pool - Pool pays tranches in order (senior first) - Excess spread flows to equity [1:05-1:20] Key participants appear: - Rating Agencies: Assess credit risk - Servicer: Collects payments - Trustee: Protects investors - Underwriters: Market securities [1:20-1:30] Benefits summary: 1. Funding diversification for originators 2. Investment opportunities for investors 3. Risk transfer to capital markets
Why Securitise?
Securitisation offers benefits to multiple parties across the transaction:
Funding & Capital Benefits
- •Funding diversification beyond traditional bank lending
- •Lower cost of funds than corporate debt
- •Balance sheet management via true sale treatment
- •Regulatory capital efficiency for banks
Investment Benefits
- Portfolio diversification into new asset classes
- Risk-adjusted returns via structured tranches
- Credit enhancement protections on senior notes
- Predictable amortising cash flows
Basic Structure
At its simplest, securitisation involves a straightforward sequence:
Asset Origination
An originator creates or acquires financial assets—consumer loans, mortgages, receivables.
True Sale to SPV
Assets are sold to a special purpose vehicle, achieving bankruptcy remoteness from the originator.
Securities Issuance
The SPV issues tranched securities backed by asset cash flows to capital markets investors.
Servicing & Administration
A servicer collects payments while a trustee distributes cash according to the waterfall.
The Securitisation Process
Bringing a securitisation to market is a complex, multi-month process involving numerous parties and workstreams. Here's how it typically unfolds.
Phase 1: Preparation
Phase 2: Structuring
Phase 3: Marketing
Phase 4: Pricing & Closing
Asset Selection and Pooling
Not all assets qualify for a securitisation pool. Eligibility criteria ensure the assets have the characteristics needed for predictable performance and investor confidence.
Common Eligibility Criteria
Pool Characteristics
The aggregate pool is analysed across several weighted average metrics:
Stratification
Tranching and Credit Enhancement
Tranching divides the securities into classes with different priorities for receiving cash flows. Senior tranches are paid first; junior tranches absorb losses first. This creates different risk/return profiles from the same asset pool.
The Tranche Waterfall
Credit Enhancement Types
| Type | Description | Typical Level |
|---|---|---|
| Subordination | Junior tranches absorb losses first | 5-30% |
| Overcollateralisation | Assets exceed liabilities | 2-10% |
| Excess spread | Asset yield minus liability cost | 1-5% p.a. |
| Reserve accounts | Cash set aside for losses/liquidity | 0.5-3% |
| Letters of credit | Bank guarantee for liquidity | Varies |
For detailed coverage, see our Credit Enhancement explainer.
Rating Agency Process
Rating agencies (S&P, Moody's, Fitch, DBRS) assign credit ratings to ABS tranches. These ratings influence pricing, investor eligibility, and regulatory treatment.
The Rating Process
Preliminary Engagement
Issuer shares deal terms and asset data. Agencies provide initial feedback on required enhancement levels.
Asset Analysis
Agencies analyse historical performance, loss and prepayment expectations, concentration risks.
Structural Analysis
Review waterfall mechanics, triggers, legal structure, counterparty risks.
Cash Flow Modeling
Run scenarios to test tranche performance under stress.
Committee Approval
Internal committee reviews analysis and approves ratings.
Surveillance
Ongoing monitoring and potential rating adjustments post-issuance.
Rating Factors
Post-Crisis Changes
The Investor Base
ABS investors range from conservative insurance companies buying AAA tranches to hedge funds seeking equity returns. Understanding the investor base helps issuers structure deals to meet market demand.
Investor Types by Tranche
| Tranche | Typical Investors | Key Considerations |
|---|---|---|
| AAA | Insurance, banks, money markets | Regulatory treatment, duration, liquidity |
| AA/A | Insurance, pension funds, asset managers | Yield pickup, credit quality |
| BBB | Asset managers, hedge funds | Risk-adjusted return, convexity |
| Equity | Originators, hedge funds, specialist funds | Excess spread, call rights, alignment |
Investor Considerations
Ongoing Reporting
After issuance, extensive reporting keeps investors informed about pool performance and structural status.
Monthly Reports
Typical monthly investor reports include:
Loan-Level Data
Event Notifications
Regulatory Framework
Securitisation operates within extensive regulatory frameworks, particularly following the Global Financial Crisis. Key regulations vary by jurisdiction.
Risk Retention
EU Securitisation Regulation
US Regulation
STS Benefits
Preferential Treatment
Putting It Together
Securitisation is a powerful tool that connects asset originators with capital markets investors. When properly structured, it provides efficient funding for originators, diversified investment opportunities for investors, risk distribution across the financial system, and transparency through extensive disclosure requirements.
Understanding the fundamentals—asset selection, tranching, credit enhancement, and regulatory requirements—is essential for anyone working with securitised products.
Further Reading
5 curated resources from industry experts
Rating Agency Resources
Structured Finance Sector Research
In-depth insights into market trends across ABS, RMBS, CMBS, CLOs, and other structured credit from one of the leading rating agencies.
Structured Finance Solutions
Comprehensive solutions leveraging 30+ years of structured data, tested cashflows and analytics for ABS, RMBS, CDO, and CMBS.
Industry Associations
About Securitization
Overview of the $15.6 trillion securitisation market from the leading US industry association representing 370+ market participants.
SFAcademy: The Bootcamp Series
Educational programme introducing securitisation fundamentals through accessible explanations and real-life examples.
External links open in new tabs. These resources are provided for educational purposes and do not constitute endorsement.