Esoteric ABS Asset Classes

The ABS market has expanded far beyond consumer credit and mortgages into esoteric asset classes—securitisations backed by revenue streams from music royalties, data-center leases, litigation settlements, aircraft leases, and even renewable-energy contracts. These deals share the same securitisation mechanics as plain-vanilla mortgage-backed or auto-loan pools but present distinct structuring challenges: lumpy cash flows, concentration risk, counterparty dependence, and the need for specialist valuation.

Why esoteric collateral entered ABS markets

For 40 years, ABS was dominated by consumer credit (auto loans, credit cards, student loans) and residential mortgages. The pools were large, geographically dispersed, and arithmetically simple: thousands of small obligors meant low correlation and predictable defaults.

By the 2000s, demand for higher-yielding assets outpaced the supply of plain consumer loans. Issuers discovered that sophisticated investors would buy tranches backed by almost any stable cash flow stream if the underwriting was thorough and the securitisation structure was sound. Walls Street, the City of London, and other markets began experimenting.

The 2008 crisis paused innovation, but by the mid-2010s, esoteric ABS had re-emerged—now with tighter standards. Today, esoteric deals comprise perhaps 5–15% of the European ABS issuance by volume, but a higher share by complexity and underwriting expertise required.

Royalty-backed securitisations

The clearest example is music or publishing royalties. An artist, songwriter, or rights holder with a catalogue of past and future royalties can securitise those cash flows.

A typical structure:

• Obligor pool: Usually one or a handful of artists/catalogues (high concentration)
• Cash source: Streaming, licensing, and mechanical royalties paid by platforms and publishers
• Risks: Streaming platform defaults (e.g., Spotify withdraws payment); artist falls from favour; licensing disputes
• Tenor: Often 5–15 years, matching the expected career lifespan of underlying rights
• Waterfall: Collections are trapped in a reserve account; excess cash, after costs and debt service, goes to the original rights holder

Royal banks and private-equity firms have acquired music catalogues specifically to use as securitisation collateral, bundling dozens of artists together to reduce concentration. These deals typically carry coupon rates 2–5% above equivalent-tenor Treasuries, reflecting the complexity and idiosyncratic risk.

Data-center and telecom lease securitisations

Data-center operators (e.g., Equinix, Digital Realty) and telecom towers (e.g., American Tower, Crown Castle) generate highly stable, long-term lease cash flows from corporate tenants. These lease revenues have been securitised repeatedly.

Why they work well for ABS:

• Obligor quality: Lessees are often investment-grade corporations or public utilities (credit-intensive users)
• Contract length: Multi-year leases with automatic escalators provide visibility
• Diversification: A single data centre has dozens of tenants; tower pools have hundreds

Challenges:

• Technology obsolescence: Fibre upgrades or cloud shifts can empty buildings
• Geographic concentration: A portfolio of towers in one region faces correlated headwinds
• Refinancing risk: If the underlying operator cannot refinance, cash flow stops

Spreads on these deals are modest (75–200 bps over LIBOR/SOFR) because the underlying cash flows are relatively stable. But they still require detailed lease-by-lease analysis.

Litigation finance securitisations

A litigation finance firm funds lawsuits in exchange for a cut of any settlement or judgment. These contracts—funding agreements with law firms or claimants—can be pooled and securitised.

Structure:

• Obligor: The law firm or settlement trust that owes repayment from case proceeds
• Timing: Highly uncertain; cases take 2–7 years to resolve
• Recovery: Usually 30–60% of settlement value goes to the finance provider
• Risks: Adverse rulings, settlement negotiations collapse, obligor bankruptcy

The cash flows are lumpy and unpredictable. Seasoned litigation-finance investors can model case-level outcomes, but ABS investors typically demand:

• Heavy over-collateralisation (150%+ of tranche size)
• Long revolving periods (to accumulate sufficient reserve funds)
• Detailed case-level disclosure

Litigation finance ABS is far less common than other esoteric types, partly because cash flows are difficult to forecast and courts are wary of securitisation of justice.

Aircraft lease securitisations

Airlines lease aircraft from lessors (e.g., AerCap, Aircastle). Lease cash flows—stable, long-term, and contracted—have been securitised extensively.

Why they appeal:

• Obligor quality: Airlines are often investment-grade, and leases have strong covenants
• Collateral value: The underlying aircraft has residual value and can be re-leased
• Tenor match: 12–15 year leases match tranche lives

Risks:

• Industry cycles: Recession reduces airline demand and aircraft utilisation
• Fuel and carbon costs: Rising energy or regulation can reduce airline profitability
• Obsolescence: Older aircraft demand lower rent; transition to new engines creates supply shocks

Aircraft ABS spreads have tightened post-2020 but remain wider than mortgage ABS because of industry cyclicality.

Infrastructure and green energy securitisations

Renewable-energy projects (solar farms, wind turbines, biomass plants) generate contracted cash flows from power-purchase agreements with utilities. These contracts—often 20–25 years, with inflation escalators—are ideal securitisation collateral.

Advantages:

• Long tenor: Matches natural deal life
• Credit quality: Utilities are often investment-grade counterparties
• Inflation protection: Many contracts escalate annually
• Diversification: A pool of geographically dispersed renewable projects reduces weather correlation

Challenges:

• Operational risk: Equipment failure, maintenance delays, or grid outages can disrupt collections
• Policy risk: Changes to renewable subsidies or tax credits alter economics
• Refinancing: If the underlying project needs to refinance at maturity, terms may have worsened

These deals have grown rapidly since 2015, supported by investment mandates favouring green assets. Spreads are typically 100–250 bps over SOFR.

Structuring challenges unique to esoteric collateral

Esoteric ABS faces three persistent obstacles:

Concentration: Royalty deals may have 5–10 artists; litigation deals 10–20 cases. A single obligor’s failure is material. Underwriters must model tail scenarios where the top 3–5 obligors default together.

Correlation: Unlike auto loans (where default correlates to unemployment), esoteric cash flows may be tied to a single counterparty’s fate. If a data-centre tenant consolidates facilities, multiple leases vanish. If a music artist ceases touring, streaming and licensing may both collapse.

Valuation uncertainty: Rating agencies lack decades of historical data. Credit enhancement must be higher (often 40–60% vs. 15–25% for auto ABS) to offset model risk. Underwriters spend months building bespoke scenario analysis.

Market size and investor base

Esoteric ABS is a niche but growing segment. European issuance of non-mortgage, non-consumer ABS grew from roughly €10bn in 2015 to €30–50bn annually by 2022–23. The investor base includes:

• Specialist ABS funds (Pimco, Invesco, Neuberger Berman)
• Insurance companies seeking long-duration, stable returns
• Bank trading desks
• Central bank asset-purchase programs (in some jurisdictions)

Liquidity is lower than in mortgage or auto ABS; bid-ask spreads are wider, and secondary market trading is episodic. Investors must expect to hold esoteric ABS to maturity or accept execution risk when selling.

See also