Climate realism: why infrastructure investing needs a policy lens

For those of us investing in infrastructure and real assets, much of this will feel familiar.

Infrastructure investors have always operated closer to policy, regulation and physical systems than most other parts of the market. The assets are long-lived, capital-intensive and directly shaped by permitting, pricing and regulatory frameworks. The relationship between policy and investability is not a theoretical observation. It’s the day-to-day reality of underwriting, owning and managing these businesses.

The LSE research provides evidence and a language for something infrastructure practitioners have long understood: climate outcomes are primarily a function of policy and technology. The role of investors is to allocate capital and manage assets where those forces create commercially viable pathways.

Good intentions, wrong mechanism

The tension at the heart of the LSE findings is one that infrastructure investors navigate routinely.

Climate change is, in economic terms, a policy-defined externality. Change happens when regulation shifts the underlying economics through carbon pricing, efficiency standards, electrification incentives or market design. When it doesn’t, voluntary action by investors or companies is unlikely to solve the problem at system scale. In competitive markets, expecting firms to internalise costs ahead of regulation creates tensions with fiduciary duty and competitiveness that are hard to sustain.

None of this is an argument for passivity. Investors can and should engage with policy development, support market infrastructure, and ensure that material risks are properly priced. The point is that these activities work with the grain of policy, not as a substitute for it.

The challenge is compounded by how the investment chain works in practice. Asset owners can pursue outcomes beyond financial return and embed those aims in mandates. Asset managers occupy a different position. They invest within mandates, under competition, and with a duty to act in clients' best interests. Without explicit authorisation, absorbing costs to deliver system-level outcomes that depend on others doing the same can be difficult to justify.

That mismatch between system-level ambition and mandate-level authority explains much of the recent recalibration across the industry. It’s not a loss of interest in climate change. It’s a recognition that the original theory of change relied too heavily on markets and not enough on policy. Where asset owners want climate outcomes that go beyond financially material integration, the right place to specify that is in the mandate, explicitly, not through implicit market pressure or industry norms.

For infrastructure, the theory of change was always informed by policy.

Policy as the organising principle

This is consistent with the concept of grounded sustainability, which we have written about previously. This integrates environmental factors where they are financially material and aligned with client mandates, while being clear about the limits of what investors and companies can achieve without supportive policy frameworks.

In infrastructure, those policy signals are visible directly. Carbon pricing, including the extension of the EU’s Emissions Trading System to transport and buildings, and the Carbon Border Adjustment Mechanism are reshaping the economics of essential services. Energy efficiency regulation, electrification incentives and permitting reform are creating investable transition pathways. Capacity and flexibility schemes are also strengthening revenue diversity for platforms that can deliver system services.

Our district heating platforms in Finland pivoted fuel sources rapidly when energy security policy and carbon pricing moved together. Our biomethane assets in Italy expanded when national incentives aligned with energy security, the circular economy and decarbonisation policy objectives. Our electrified rail investments in the UK and Germany are supported by long-term franchise structures and government decarbonisation commitments. In each case, policy created the conditions; we provide the expertise, capital and long-term stewardship to ensure the policy outcomes are delivered.

As we argued in our recent work on resilience the most investable opportunities emerge where policy aligns decarbonisation with energy security and affordability rather than forcing trade-offs between them. That alignment is what makes transition durable, and what distinguishes assets that are genuinely well-positioned from those that depend on subsidy or sentiment alone.

A structured climate framework

The logical consequence of a policy-led view is a framework that distinguishes between assets based on transition credibility and economic viability together, not based on current emissions alone. We apply a four-category climate framework across origination, due diligence and asset management. This includes:

Locked-in assets that face transition risks that can’t be credibly underwritten. These are excluded from the investable universe.

Essential improvers that may be emissions-intensive but provide critical services with no viable near-term alternative. They often have value-accretive improvement pathways underpinned by policy and technology trends. Many of our district heating investments began here. Rather than take a binary view of fossil fuel exposure, we worked with management on credible decarbonisation plans. Today, these assets are on track for zero-carbon heat production by 2030.

Low-impact enablers that are inherently low-emitters. They provide essential services where the investment case rests on service criticality, regulatory stability and predictable cash flows. Many transition and distribution assets fit in here.

Transition-aligned assets that actively support decarbonisation through credible plans or by enabling avoided emissions. They are assessed against structured criteria that are informed by industry standard definitions.

The purpose of this framework is not just to label assets. It’s to ensure that climate risk and opportunities are embedded in the investment process rather than running alongside it.

Final thoughts…

There’s a welcome convergence between the academic evidence and how infrastructure investment has operated in practice. If that convergence holds, climate integration across asset classes will increasingly be grounded in policy realism, financial materiality and honest acknowledgement of what investors can and can’t do. The lower mid-market offers structural advantages in executing this approach. The work is local, the assets are physical, the governance is direct, and the results are measurable. Climate leadership in 2026 is not about louder pledges. It’s about better pricing, better governance, and better alignment between what investors promise and what they can actually deliver.