The risks posed by “stranded assets” — assets that unexpectedly lose value as a result of climate change — are rapidly climbing the investment industry’s agenda.

The 21st annual Conference of the Parties (COP 21), held in Paris during December 2015 and ratified in early October 2016 by 74 signatories, has propelled global warming toward the top of the financial services agenda. Even so, the sheer scale of the issue makes it a challenging one for many institutions.

Stranding may have grabbed the headlines, but it is arguably the tip of an iceberg. If commitments to limit global warming to 2°C are to be fulfilled, then the coming decades will see a worldwide “energy transition” with vast financial implications. Financial institutions face many interrelated and highly complex climate-related risks. On the upside, research suggests that investment opportunities arising from the energy transition will actually outweigh climate-related risks in the long term.

The scale of these issues calls for an urgent response across the investment value chain. Individual firms also have a fiduciary duty to address climate-related opportunities to enhance value of the investment. Indeed, climate-related risks are too far-reaching for financial institutions as the possible value creation or erosion can be significant. They will impact all sectors, including extraction industries (mining and energy), manufacturing, and carbon sinks (forest, ocean, or other natural environment viewed in terms of its ability to absorb carbon dioxide from the atmosphere). A dearth of consistent, reliable data and an absence of credible analytical models also mean that investment professionals trying to address climate change are largely working in the dark.

Despite these obstacles, financial institutions are taking tangible actions to address climate-related challenges. This not only allows them to begin identifying risks and opportunities. It also shows that external stakeholders such as regulators, individual investors and the media are playing an active role in the energy transition.

This article addresses a number of specific steps that asset owners, asset managers, banks and other players, such as consultants and advisors should consider taking. These vary between institutions, but consistent themes include:

Above all, it is vital for financial institutions to understand that addressing stranding risks and other financial risks and opportunities of climate change is not a one-off process. It needs to become a permanent part of everyday decision-making.

Addressing climate change requires collective action and collaboration across the investment value chain. But individual institutions bear ultimate responsibility for managing climate-related risks and opportunities on behalf of their clients and their own shareholders. Those that respond proactively will create value for their clients, give themselves a competitive advantage, reduce systemic financial risks and make an invaluable contribution to society as a whole. However, those who fail to take action will soon experience the implications across the whole investment value chain, resulting in significant costs and damage to economies.

The complex financial impact of climate risks

The Paris Agreement of December 2015, ratified in early October 2016, provides a milestone achievement in a series of events, speeches and reports that have propelled the issue of climate change to prominence over the past two years.

The potential financial consequences of climate risk are often debated in terms of “stranded assets.” The value of global financial assets at risk from climate change has been estimated at US$2.5t by the London School of Economics, and US$4.2t by The Economist. For comparison, the annual Gross Domestic Product (GDP) of Japan, the world’s third largest economy, is worth about US$4.8t.

The staggering scale of these potential losses has done a lot to raise awareness of climate risks in investment circles. But “stranding” is only part of a complex range of climate risks — each of which creates its own opportunities. Climate risks can be summarized as:

This simplified list is only a starting point for assessing climate-related risks. Scientists expect many physical effects of climate change — such as polar melting — to be self-reinforcing. Different types of these risks can interact with each other in complex ways, for example when physical effects lead to migration, causing economic instability or underinvestment, all contributing to the stranding of the core asset. Other external factors also have huge potential to complicate or enhance climate-related risks. These factors include oil, gas, coal and energy prices, the potential for emerging renewable technologies to render existing infrastructure uneconomical, and the views of consumers, lobbyists and nongovernmental organizations.

As complex as climate risks may be, they only represent half the story. Global GDP is expected to triple by 2060, driven largely by developing markets. Yet, today, 1.3 billion people in those markets still have no reliable access to electricity. Delivering the power that global development will require represents a vast investment opportunity. Research suggests that the economic benefits of investment will outweigh the costs of inaction. Studies by both the London School of Economics and The Economist (referenced earlier) expect total global output to be higher under a lower emissions scenario; Citigroup expects investment in climate change mitigation to generate attractive and growing yields; and Mercer believes a 2°C scenario will not harm diversified returns to 2050, and would be accretive thereafter.

Of course, the precise balance of investment risks and opportunities will depend on future climate scenarios, and what investment decisions will be made — whether through conventional means, e.g., coal-fired power stations, which add to global warming and climate change, or through low carbon means to help mitigate the problem. But, in aggregate, the post-Paris “energy transition” should not present fears for well-prepared investors.

Climate change scenarios

Climate change scenarios are used by public and private sector bodies as a basis for policy decisions and economic planning. Financial institutions can develop their own scenarios, but many will find it easier to adapt those used by expert bodies, such as the Intergovernmental Panel on Climate Change (IPCC). Climate change scenarios are often described in terms of post-industrial temperature rises (e.g. “a 2°C scenario” or “a 4°C scenario”), but are properly defined by both probabilities and temperatures. For example, the IPCC’s Representative Concentration Pathway 2.6 (RCP 2.6) offers a 50% chance of limiting global warming to 2°C.

The IPCC’s latest scenarios are*:

Each scenario makes assumptions about the levels of greenhouse gas emissions and the capture mechanisms required to achieve it. Understanding and questioning those assumptions is crucial to gaining valuable insights from scenario planning.

How did we get here, and what comes next?

Sustainability campaigners have tried for years to use the financial industry as a lever for environmental action. However, direct activism has often been counter-productive and deterred financial institutions from engaging with climate-related issues.

In contrast, research-led campaigns — such as Carbon Tracker’s influential Unburnable Carbon reports — have done much more to raise awareness of stranding risks and spark debate over other climate-related factors. Figure 1 from the Carbon Tracker Initiative reflects the surplus of oil and coal that exists that would not be useable in a 2°C scenario. This awareness has led to the development of more than 400 national and international corporate disclosure schemes, such as the International Integrated Reporting Council (IIRC) and the World Bank’s Carbon Pricing Leadership Coalition (CPLC). Approximately 90% of FTSE 100 and 80% of Fortune Global 500 companies participate in at least one of these schemes.

At the same time, institutional investors such as pension funds and insurers have made commitments to improve the disclosure of the carbon footprints of their investments. For example, 2014 saw the Montreal Carbon Pledge signed by 92 institutions managing US$6t in assets, and the Global Investor Statement on Climate Change signed by 347 institutions managing US$24t. The Carbon Disclosure Project (CDP) has also been a key contributor in this area, not just for carbon.

EY - Carbon dioxide emissions

Figure 1: Carbon dioxide emissions potential of listed fossil fuel reserves

The volume of financial debate on climate change increased significantly in 2015. In May, France introduced Article 173 of a new law on energy transition, requiring institutional investors to disclose how they manage climate risks. In June, a UN report on responsible investing stated that pension funds in the developed world have an obligatory duty to consider sustainability as part of their fiduciary responsibilities. In September, Bank of England Governor Mark Carney explicitly linked climate change to financial stability in a major speech. The year also saw a range of eye-catching commercial research findings focused on stranded assets:

In retrospect, it seems clear that Mark Carney’s Tragedy of the Horizon speech and the landmark Paris Agreement represent a major turning point in the climate debate. Institutional investors can be in no doubt of the potential for climate risks to lead to financial ones.

Financial institutions are also increasingly aware of international efforts to honor the Paris Agreement’s third objective: making “finance flows consistent with a pathway towards lower greenhouse gas emissions and climate resilient development.” In particular, the Financial Stability Board’s Taskforce on Climate-Related Financial Disclosure (TCFD) aims to facilitate this “energy transition” by improving global transparency over climate-related reporting. The TCFD’s final report, due in February 2017, will intend to suggest historic and forward-looking quantitative and qualitative disclosures, as well as making recommendations for securities issuers, listed companies and financial institutions.

Furthermore, financial institutions are realizing that the transition to a lower-carbon future, including understanding which assets are likely to become stranded, will also create investment opportunities. The potential upside of the energy transition has received relatively little attention to date, but that is changing fast. One example of this is contained in the G20 Green Finance Synthesis Report, which highlights the voluntary options that could enhance the ability of the financial system to mobilize private capital for green investment. The rest of this paper considers what actions different financial institutions can take to mitigate climate risks and maximize the related opportunities.

Climate and the investment value chain

Investment decisions are already reflecting climate risks. This is illustrated by the US$20b decline in the market capitalization of Peabody Energy over the past few years, a textbook example of stranding.

However, reducing exposure to coal or any other sectors cannot protect investors from climate risks.

"The scale and breadth of these risks mean they simply cannot be avoided or diversified away. They will impact all sectors and asset classes in different ways. "
Julian Poulter
Asset Owners Disclosure Project (AODP)

Which sectors will climate risks affect, and which assets will they leave stranded?

The short answer is that climate risks impact every sector. It is simply not possible to say that any climate change scenario is either “good” or “bad” for a specific industry. Every sector requires energy and has some carbon exposure, including knowledge-based industries such as financial services, pharma or healthcare. Each company’s exposure will depend on business models, strategies, locations, assets and liabilities.

Other sectors that are heavy users of energy or particularly emission intensive are:

And there are sectors that act as “carbon sinks”, such as:

However, it is just as important to stress that individual companies within all of these sectors could also offer investment upsides. Looking forward, other established and emerging sectors that could help to mitigate climate risks might also include:

Nor are risks clear-cut, as illustrated by the complexity of the “unburnable carbon” debate. Despite estimating that only 700-800b of the world’s 1.7t proven barrels of oil will be required under a 2°C scenario, the International Energy Agency (IEA) still believes significant investment in oil exploration and production is required. That reflects a range of factors including oil prices, OPEC policy, geopolitics and the different costs of producing oil from sands, shale, onshore and deep water sources.

Unfortunately, it is difficult for financial institutions to make precise judgements about climate risks — or related investment opportunities. One major problem is the absence of sufficiently detailed, reliable and consistent data. The TCFD is widely viewed as the most encouraging disclosure initiative to date, but it is far from an ideal solution. In the opinion of Ben Caldecott, leader of the University of Oxford’s Sustainable Finance Programme, “the TCFD is a step in the right direction, but much greater detail is required for meaningful analysis to be possible. Investors need a scientific approach based on detailed emissions data at individual asset level.”

Financial institutions are also working without robust investment models. Macro-level Integrated Assessment Models (IAMs), such as the “social cost of carbon” (SC-CO₂) model used by the US EPA have serious limitations and do not support individual investment decisions.

The problems of data and analysis will not be resolved overnight. Furthermore, financial institutions need to respond to the actions of other players in the investment value chain, not to mention the shifting agenda of stakeholders including governments, regulators, customers, staff and the media (see figure 2). Even so, actors in the investment value chain need to address climate risks sooner rather than later. The sections that follow consider what specific actions different players can take to try and optimize their own responses.

EY -- The investment value chain

Figure 2: The investment value chain

There are steps that all asset owners can take to optimize their response to climate-related issues.

Challenges and responses: Asset owners

Insurers, pension funds and other asset owners are increasingly keen to address the financial aspects of climate change. Institutions want to show regulators, their own investors and the public that they can manage climate-related risks and opportunities — just as they manage other investment variables.

Even so, many asset owners are only beginning to respond to stranding and other risks. Many lack the in-house expertise to develop an informed view about climate change scenarios. As one UK pension fund trustee put it, “we just don’t have the ability to critically evaluate the decisions of asset managers in this area.” More broadly, asset owners find it hard to incorporate climate risks into investment strategies while meeting their solvency and performance benchmarks. EY’s survey shows that only 24% of institutions frequently factor ESG considerations into their investment decisions.

Fortunately, there are steps that all asset owners can take to optimize their response to climate-related issues.

Insurers, pension funds and other institutions can ask themselves some key questions to assess their readiness.

Asset classes and investment vehicles

A wide range of asset classes can expose financial institutions to climate-related risks and returns. Looking forward, credit markets may offer the greatest potential for growth. Investor demand for yield is strong, and renewable energy and energy efficient assets have the potential to generate stable cash flows to fund the costs of debt.

Asset managers

The financial implications of climate change represent a major challenge for asset managers. Asset owners and, increasingly, regulators expect them to demonstrate specific policies and processes to identify and mitigate stranding risks.

However, many are struggling to provide anything more than general reassurances about existing risk management procedures. This is especially true for managers investing in emerging markets. The problems of reliable data and analysis also strike at the heart of asset managers’ business models. Many are frustrated by the difficulty of obtaining climate-related information from investee companies. Portfolio managers specializing in oil and gas, energy, mining or utilities often struggle to reconcile third party academic and economic research with the plans and projections they receive from investee companies.

The good news is that there is a major opportunity on the other side of these challenges. Asset managers that can limit climate-related losses and seize on investment upsides have a chance to claim a valuable advantage in an extremely competitive industry. The prospect of increasing scrutiny from consultants and other observers will only enhance the benefits for early adopters and champions in this space.

There is no such thing as a perfect climate strategy for asset managers, but there are a number of positive steps that asset managers can explore, if they have not done so already:

Consultants, advisors and ratings agencies

Investment consultants, ratings agencies and other advisors have a valuable opportunity to help asset owners navigate their way through the uncharted waters of climate-related investment.

Investment consultants in particular can help to bridge the gaps that can develop between investors and asset managers. It is not unusual for climate-related factors to be overlooked, with asset owners assuming that asset managers are taking charge, while asset managers feel unable to take decisions without specific instructions.

Investment consultants can help to ensure that asset owners make their priorities clear through investment agreements or via statements of investment principles — as institutions such as the UK Environment Agency Pension Fund have done. In doing so, they may need to convince investors that they can tackle climate-related issues without negatively impacting investment performance. Consultants can also help investors to balance their portfolios — perhaps by offsetting a large slice of passive assets with smaller active mandates. Mid-tier institutions, such as local authority pension funds are likely to be especially grateful for guidance.

As already mentioned, credit ratings agencies are beginning to incorporate climate risks into their ratings methodologies. In time, there may be scope for an incumbent or a new entrant to provide a ratings service dedicated to ESG metrics including carbon emissions. In the words of Herve Guez of Mirova, “an ESG equivalent of Moody’s, Fitch or S&P will take time to emerge, but would create a huge amount of value across the investment universe.”


Banks, investment banks and broker-dealers play a wide variety of roles within the investment value chain, both as providers of finance and as facilitators of investment.

Regulators, shareholders and activists, aware of this pivotal role, are encouraging the banking industry to address climate-related risks and opportunities. Given their complex business models, it is particularly important for banks to develop a consistent view on climate-related issues that can serve as the basis for strategic and operational decisions across a range of business units. As for asset owners and asset managers, banks also need to incorporate climate risks into their overall governance and risk management frameworks.

The banking industry can respond to climate-related issues in two ways. The first is through their own balance sheets. Many banks are taking steps to monitor their balance sheet exposure to stranding risks, often adapting frameworks supplied by specialists, such as Carbon Tracker. For example, several Australian banks have publicly documented their adoption of a top-down approach that combines internal sector exposure data with external emissions data to estimate the carbon intensity of their lending books. Even if this can only offer an approximate measure of risk, it still provides a starting point for future assessments of balance sheet exposure. Banks can also take climate-related factors into account when making forward-looking lending decisions. This is particularly true given the long-term nature of many lending commitments and the consequent risk of exposure to unpredictable policy shifts. Like other financial institutions, banks are limited in their ability to make quantitative judgements about climate-related data. However, that does not prevent them from developing a lending strategy that combines their views on the energy transition with other strategic considerations, such as growth targets or geographic priorities. Banks can also contribute to collective organizations, such as the 2° Investing Initiative, exploring new tools for assessing climate-related investments. At a micro level, banks also need to ensure that they are taking note of specific risks to assets or borrowers from local changes, such as energy efficiency regulations.

Banks’ advisory activities as facilitators of investment represent the second way they can respond to climate-related issues. Sell-side research is one aspect of this, and has a key role to play in shaping the debate on environmental economics. Sell-side analysts hold companies to account by questioning and critiquing companies’ performance and plans. Investment banks’ research teams are also the most likely source of credible valuation techniques for investors, asset managers and others to use. “I would love to see the sell-side suggest new valuation approaches that go beyond current models — for example, by setting out a way to value oil and gas majors during the energy transition,” says Mark Campanale of Carbon Tracker Initiative.

Finally, the advisory businesses of corporate and investment banks can help shape the finance industry’s response to climate change. “Banks have a huge role in helping their clients to evolve,” explains a director from a major UK bank. “It is banks that can do more than any other institution to help large corporates adapt and move in new directions.” The banking industry has been instrumental in the development of green bond markets, and can help develop new investment routes for a changing world. For example, financial vehicles that would allow institutions from developed markets to invest in emerging market assets at investment grades could unlock a powerful new wave in clean energy investment.

In short, there is a huge opportunity for the banking sector to use its central role in modern financial systems to help other financial institutions create value as they transition to a low carbon economy.


The growing public debate over climate risks, particularly stranded assets, means that financial institutions are increasingly aware of the potentially vast scale of climate risks. Even though divesting these risks entirely is impossible, many have already taken tangible investment decisions in response.

Institutions such as insurers and pension funds are also waking up to the opportunities arising from the transition to a low carbon economy, and are working to improve the data and expertise they can call on. Nonetheless, few financial institutions would claim that they have mastered climate related issues, nor that they fully understand the systemic risks they pose to the stability of the financial system. Players throughout the investment value chain are struggling to get to grips with this uniquely complex issue — one made even more challenging by the unpredictability of future political and regulatory responses, and a lack of reliable data.

There is much that financial institutions can do to address climate-related risks and opportunities. Collective action can be a powerful tool when facing such an intimidating issue. The Portfolio Decarbonization Coalition — launched by the United Nations Environment Programme (UNEP) and the Carbon Disclosure Project, and supported by a range of large insurers, endowments, pension funds and asset managers — is one such example.

Above all, individual actors in the investment value chain have a fiduciary duty to optimize their responses to climate change — as they do for all risks and opportunities. Institutions need to incorporate the management of climate-related issues into their day-to-day activities.

Depending on their role within the investment value chain, firms can take a number of tangible steps including:

Financial institutions around the world have a unique opportunity to shape the global transition to a low carbon economy. This will help their clients to optimize climate-related risks and opportunities. It will play an invaluable role in reshaping the global economy. It will reduce the risks of a systemic financial crisis. And it will help individual firms to emerge as winners from the rapidly changing economic order.

* Source: Pachuari, Meyer, “Climate Change 2014: Synthesis Report – Summary for Policymakers”, Intergovernmental Panel on Climate Change, 2014, © 2014 IPCC

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