Glossary · Strategy
Core Infrastructure
Core infrastructure is the infrastructure equity strategy that market participants treat as lowest risk: operating assets with regulated or long-term contracted revenue, moderate leverage and returns expected mainly from cash yield rather than growth or exit gains.
A regulated electricity network, or a finished hospital that a government pays for under a long-term contract, earns predictable income with few surprises. Funds that buy assets like these and hold them for a long time are called core. Core is a market label, not a regulatory category: each manager writes its own criteria, so two core funds can carry quite different risks.
Characteristics usually associated with core
Core infrastructure is a market label that each manager defines in its own documents. In practice it is applied to assets that combine most of the following:
- Operating, not under construction. Usually brownfield, with an operating record.
- Revenue fixed by regulation or contract for most of the expected hold: a regulated asset base, availability payments in an operating PPP, or long-term contracted revenue with creditworthy counterparties.
- Essential service with limited demand risk, often a natural monopoly.
- Inflation pass-through written into the tariff formula or contract.
- Moderate leverage relative to the same manager's other strategies.
- Return mostly from distributions, with little reliance on exit multiple or growth capex.
Typical examples are electricity transmission and distribution networks, water utilities, operating availability-based PPPs and, for some managers, contracted renewable generation or midstream assets under take-or-pay contracts. Those last two are where managers disagree most.
Core, core-plus, value-add and opportunistic
The four labels mirror the fund styles used in real estate, but in infrastructure each manager sets its own thresholds. They describe relative positions on a spectrum, not fixed return bands.
| Label | Revenue | Development risk | Main return driver |
|---|---|---|---|
| Core | Regulated or long-term contracted | None (operating) | Cash yield |
| Core-plus | Mostly contracted or regulated; some roll-off or volume exposure | Limited (expansion capex) | Yield plus some growth |
| Value-add | Partly contracted or merchant | Material (build-out, repositioning) | Growth and exit |
| Opportunistic | Often merchant or emerging-market | High (development, distress) | Exit |
Core-plus accepts some growth capex, contract roll-off or volume exposure in exchange for a higher target return; each manager draws its boundary with core in its own documents. Target returns and leverage limits differ by manager and vintage. The comparable facts are in each fund's documents: target net return, leverage limits at asset and fund level, permitted greenfield exposure and concentration limits. Two core funds are compared on those terms, not on the label.
How core infrastructure is held
Core assets have no natural exit date, so they are often owned for long periods: directly by large pension funds and sovereign wealth funds, through open-end funds that admit and redeem investors periodically, or through long-dated closed-end funds and co-investments. Open-end structures shift attention from exit value to the reliability of the NAV used for subscriptions and redemptions, and to redemption terms such as queues and gates.
Where the risk sits in a core asset
- Regulatory reset. Allowed returns on regulated assets are revised at each price control; a lower allowed return reduces value.
- Counterparty and contract expiry. A government or offtaker must keep paying, and what happens when the contract ends drives the residual value.
- Indexation mechanics. Caps, lags and partial indexation weaken inflation protection.
- Leverage. Holding-company debt above the operating company can make a stable asset produce volatile equity returns, and refinancing at higher rates reduces distributions.
- Discount rates. Long-dated, stable cash flows are highly sensitive to the discount rate used in valuation; core NAVs fall when rates rise even if cash flows are unchanged.
- Lifecycle and transition. Maintenance capex, hand-back obligations in concessions and policy shifts (for example away from gas networks) affect long-term cash flows.
How LPs underwrite core
LPs use core infrastructure for long-dated income that can be matched against liabilities. Diligence focuses on:
- revenue split by year into regulated, contracted, user-pays and merchant;
- weighted average remaining contract life versus the expected hold;
- counterparty credit quality;
- leverage at asset and fund level and the refinancing schedule;
- valuation method and discount-rate assumptions, since appraisal-based NAVs smooth reported returns.
EU insurers may also test assets against Solvency II's qualifying infrastructure criteria (Article 164a of Delegated Regulation (EU) 2015/35, as amended in 2017), which include investment in an infrastructure entity, meaning one that derives the substantial majority of its revenues from owning, financing, developing or operating infrastructure assets; cash flows that allow all financial obligations to be met under sustained stresses; predictable cash flows to debt and equity investors; and a regulatory or contractual framework that gives those investors a high degree of protection. Those criteria overlap with core but are a separate, legal test.
Not the same as
- Core Real Estate: Same label, different asset class: core real estate is stabilised, leased property with low leverage, earning rent rather than regulated or contracted service income.
- Infrastructure Debt: Senior debt on a core asset has a fixed contractual claim. Core equity keeps the residual claim and absorbs regulatory, operating and refinancing risk first.
- Project Finance: Project finance is a way of funding one ring-fenced asset with debt repaid from its own cash flows; core infrastructure is an equity strategy that may own such project companies.
How it is classified
- A practical test (editorial, not an industry standard): label an asset core only if, at acquisition, it is operating, most forecast revenue over the hold is regulated or contracted with creditworthy counterparties, the expected return comes mainly from distributions, and leverage is moderate for the manager. If any test fails, core-plus or value-add is the better label.
Common mistakes
- Calling core infrastructure bond-like. It is equity: valuations move with discount rates, and distributions depend on regulation, operations and leverage.
- Assuming core funds from different managers are comparable because they share the label.
- Ignoring holding-company debt when assessing an asset that is stable at operating-company level.
- Treating any renewable asset with a contract as core regardless of how long the contract runs relative to the hold.
Edge cases
- An availability-based PPP near the end of its concession is fully contracted but its cash flows stop at expiry; it has no residual value to the owner.
- An airport with regulated charges still carries passenger-volume risk; managers classify it as core or core-plus differently.
- A regulated utility with a large expansion programme earns returns on new capex, which some managers treat as core-plus.
Questions
What returns does core infrastructure target?
Targets are set manager by manager: each states a target net return and leverage limits in its fund documents, and those terms, not the label, set the fund's return and risk profile.
Are renewables core infrastructure?
Operating renewables with long fixed-price contracts with creditworthy buyers are treated as core by some managers. Projects with short contracts, merchant tails or construction risk are usually core-plus or value-add.
External standards
| Standard | Relation | Note |
|---|---|---|
| Solvency II Delegated Regulation (EU) 2015/35 (Art 164a qualifying infrastructure investments (inserted by Delegated Regulation (EU) 2016/467; paragraph 1 replaced by Delegated Regulation (EU) 2017/1542)) | related | A legal test for insurer capital treatment; overlaps with, but is not the same as, the market label core. |
Sources
- Commission Delegated Regulation (EU) 2016/467 amending Delegated Regulation (EU) 2015/35 concerning the calculation of regulatory capital requirements for several categories of assets held by insurance and reinsurance undertakings. Official Journal of the EU, L 85, 1.4.2016, p. 6, Adopted 30 September 2015; published OJ L 85 of 1 April 2016; in force the day after publication (Art 3). Status: In force as part of Delegated Regulation (EU) 2015/35, which has been amended since (checked 2026-10-01). Art. 1(4) inserting Art. 164a — supports: Qualifying infrastructure investment category introduced in 2016
- Public-Private Partnerships Reference Guide, Version 3. World Bank Group with multilateral partners, World Bank, Version 3, 2017. Status: Current edition; online version maintained on the PPP Knowledge Lab (checked 2026-10-01). Government-pays PPPs; availability payments — supports: Availability-based PPP payments depend on the asset being available at contracted quality
- Commission Delegated Regulation (EU) 2017/1542 amending Delegated Regulation (EU) 2015/35 concerning the calculation of regulatory capital requirements for certain categories of assets held by insurance and reinsurance undertakings (infrastructure corporates). European Commission (Official Journal of the EU), Adopted 8 June 2017; CELEX 32017R1542. Status: in force (checked 2026-10-02). Art. 1(1) (Art. 1(55b) infrastructure entity); Art. 1(2) (Art. 164a(1)(a)-(c)) — supports: Current infrastructure entity definition and qualifying infrastructure criteria