Although thinking on climate change has moved on considerably in the past decade – there are now few absolute climate change deniers – the focus of most concerns still centres on the physical damage from extreme weather due to climate change. But the damage of climate change extends far beyond that, potentially affecting productivity, economic growth and investments.
Pioneering new research from the Economist Intelligence Unit, sponsored by Aviva and in collaboration with Vivid Economics, quantifies that potential impact on investments. It applies the EIU’s long-term forecasting to a leading, peer-reviewed forecasting model, the DICE model, which links economic growth, greenhouse gas emissions, climate change and the damages from climate change back on the economy.This allowed us to calculate the value at risk of climate change on global investible assets, at several different levels of expected temperature rises due to climate change, to the year 2100 – the climate VaR.
This climate VaR demonstrates the potential cost of inaction. If temperatures rises by 3 degrees Celsius, losses of $4.2trn are expected - roughly the total value of the world’s publicly listed oil and gas companies or the entire GDP of Japan. If they rise by as much as 6 degrees, those losses balloon to $13.8trn.
Investors may dismiss these losses as relatively minor, as stock market moves can regularly wipe away 3-10% of a portfolio’s value, but that is failing to understand what this new research uncovers. This is not a recession, a financial crisis or a regular part of the business cycle. Losses from climate change do not merely represent market volatility or isolated events, but permanent impairments to total assets.
The potential damage could be even greater – the figures above are calculated using a discount rate appropriate for a private investor with an individual’s time horizon. To consider the impact of climate change from the perspective of a public-sector actor - such as a government, with longer time horizons – sees the potential losses grow to $43trn at 6 degrees of warming. That is 30% of the entire stock of the world’s manageable assets.
The hope is that these numbers scare the asset management industry, companies and regulators into action. Change is need by all three stakeholders in order to monitor, measure and mitigate the potential risk from climate change on investments, as well as the wider global economy.
Regulation has largely failed to confront the risks associated with climate change borne by investors. To enable meaningful risk analyses, regulators should require public companies to disclose their emissions in a standardised and comparable form. Institutional investors should be required to use this information to calculate the risk their portfolios face from climate change, and make this information publicly available so that individual investors can make informed choices about how to put their money to work. This should drive institutional investors to go a step further and take steps to reduce and mitigate the climate risk to their portfolios – engaging with poorly performing companies to push for change, divesting if that engagement does not result in action and actively investing in areas such as green technology.
Some companies do disclose their carbon emissions and some asset managers do consider climate risk, but those leaders face an uneven playing field. Regulation is needed, not only because standardised requirements are fair but because the interconnected nature of the problem means returns, even on investments unharmed by physical damage, will be lower as overall economic growth will be lower. Unless everyone modifies their behaviour, even those doing everything right will be affected by the inaction of others.
The UN Conference of Parties in Paris at the end of the year offers all stakeholders the opportunity to step forward and agree to do their part. Unless climate change is mitigated, this research depicts a permanent divergence towards a path of lower growth and diminished prosperity for everyone.
The views and opinions expressed in this article are those of the authors and do not necessarily reflect the views of The Economist Intelligence Unit Limited (EIU) or any other member of The Economist Group. The Economist Group (including the EIU) cannot accept any responsibility or liability for reliance by any person on this article or any of the information, opinions or conclusions set out in the article.