Investing in an Energy Portfolio Approach for a World of Uncertainty

By Deborah C. Gordon, Senior Fellow, GFCC, USA

Ms. Gordon serves on the Board of Probability Management and is an advisor to emerging technology companies.

Credit: Photo by Photo by Matthew Henry on Unsplash.

Societies across the world are increasingly recognizing a fundamental challenge: energy needs are rising beyond the delivery capacity of existing infrastructure. According to the International Energy Agency (IEA), global electricity demand is expected to grow by around 3.5% per year through 2030.

This demand is being driven by a convergence of factors, ranging from the rapid expansion of hyperscale data centers to power AI to industrial production, agriculture, and the broader push to modernize economies and lift populations into higher standards of living.

But what makes the current energy transition particularly complex is not only its scale, but also the high degree of uncertainty surrounding it. Modern energy systems must operate in an environment exposed to multiple and overlapping risks, including natural disasters, geopolitical instability, cyber and physical threats, supply chain disruptions, and potential delays or failures in critical technologies.

Combined with these external threats, there is also internal disruption, because demand itself is changing: not just how much energy people need, but where they need it, when they need it, and at what scale.

Addressing this challenge is not simply a question of generating more power. It requires rethinking how energy systems are designed, distributed, and secured within a context where risks must be actively managed at every stage.

The Energy Portfolio Approach

Across regions in the United States and globally, different strategies are emerging to meet the growing global demand for clean and reliable energy. Some focus on upgrading existing infrastructure such as replacing coal-fired power plants with renewable sources to support current communities and industries. Others are developing new systems for generating and storing energy on the customer's side of the utility meter, commonly referred to as "behind-the-meter energy systems."

The central insight emerging from these developments is that no single energy source can meet the full spectrum of existing and potential future needs. Instead, regions are increasingly exploring an energy portfolio approach, combining multiple sources with distinct use and delivery characteristics:

• Fossil fuels (oil, gas, coal);

• Renewables (solar, wind, hydro, geothermal);

• Updated Nuclear technologies (SMRs and advanced nuclear);

• Emerging solutions including inertial and magnetic fusion.

Each of these options presents different trade-offs in terms of cost, risk, regulation, and scalability, and their viability often depends on geographic conditions and supply chain dynamics.

Fusion energy, for instance, offers dispatchable, safe, and clean energy. Recent milestones in fusion — including the achievement of energy gain at the US National Ignition Facility (NIF), significant developments in advanced manufacturing, and growing contributions from AI — have fueled considerable optimism and accelerated delivery timelines. Yet investors still face the fundamental uncertainty of deploying a first-of-its-kind system at commercial scale.

SMRs and New Nuclear technologies, are claimed to offer firm, reliable baseload power with near-zero emissions — but face considerable regulatory hurdles and public resistance resulting in uncertain decadal development and deployment timelines. They also require significant upfront capital.

Solar and wind can be deployed in months at rapidly falling costs, but their intermittency means they cannot serve as standalone solutions without a complementary baseload source or storage capacity. Therefore, fossil fuels remain the most immediately scalable option. However, they carry well-known climate and geopolitical risks.

No single source wins on all dimensions. A portfolio approach including emerging technologies enables energy supply systems to balance current fossil fuel dependencies — still representing around 80% of global primary energy supply — mitigate intermittency risks of renewable sources, optimize renewable advantages, and meet the world’s accelerating energy production capacity needs.

Funding an Energy Portfolio

One of the most significant challenges in building a diversified energy portfolio is mobilizing capital for first-of-a-kind technologies such as fusion. Without historical performance data, insurers cannot price risk through conventional methods and investors struggle to justify exposure — creating a financing gap precisely where innovation is most needed.

To address this issue, researchers at Stanford and MIT started exploring the application of Modern Portfolio Theory to portfolios of petroleum exploration projects in the 1990s. They suggested applying a method long used in financial engineering that simulates a wide range of possible futures and stores the results in accessible “stochastic” libraries.

This framework allows analysts to interactively test scenarios across a wide range of portfolios including novel technologies and to identify mitigation strategies that are robust across all of them. Modern Portfolio Theory works even when precise historical probabilities are not available. In 2005, this approach was applied to the portfolio of a major petroleum firm by a team from Stanford, Cambridge, and Shell.

The underlying logic draws on Harry Markowitz's Nobel Prize-winning modern portfolio theory — the same framework that transformed stock portfolio selection. In 2013, Markowitz co-founded nonprofit ProbabilityManagement.org to generalize and standardize the approach across multiple domains, including energy. The result is a rigorous, data-driven foundation for rational investment and insurance decisions in technologies where no historical precedent exists — enabling capital to flow toward new energy technologies.

This portfolio-based, risk-aware approach is already being evaluated in the development of industry and innovation campuses. Projects in the US and Europe are exploring integrated models where energy generation, industrial activity, and innovation ecosystems are co-located and co-designed — translating portfolio theory into concrete infrastructure for the energy transition.

A Strategic Imperative for Competitiveness

The transition underway is not simply about generating more power. It is about designing systems that perform reliably under conditions of deep uncertainty – technological, geopolitical, and economic.

Just as modern portfolio theory transformed investment decisions by optimizing for risk-adjusted returns across diverse assets, the same logic is now being applied to energy systems. The ability to model uncertainty rigorously, identify strategies that are robust across a wide range of scenarios, and combine diverse energy sources intelligently will determine which regions and economies lead the next era of growth.

The future of energy will not be determined by a single breakthrough technology, but by the discipline to engineer resilient systems— and the foresight to invest in it before disruption makes it unavoidable.