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Climate value at risk of global financial assets

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  • Dietz, Simon
  • Bowen, Alex
  • Dixon, Charlie
  • Gradwell, Philip

Abstract

Investors and financial regulators are increasingly aware of climate-change risks. So far, most of the attention has fallen on whether controls on carbon emissions will strand the assets of fossil-fuel companies1, 2. However, it is no less important to ask, what might be the impact of climate change itself on asset values? Here we show how a leading integrated assessment model can be used to estimate the impact of twenty-first-century climate change on the present market value of global financial assets. We find that the expected ‘climate value at risk’ (climate VaR) of global financial assets today is 1.8% along a business-as-usual emissions path. Taking a representative estimate of global financial assets, this amounts to US$2.5 trillion. However, much of the risk is in the tail. For example, the 99th percentile climate VaR is 16.9%, or US$24.2 trillion. These estimates would constitute a substantial write-down in the fundamental value of financial assets. Cutting emissions to limit warming to no more than 2 °C reduces the climate VaR by an expected 0.6 percentage points, and the 99th percentile reduction is 7.7 percentage points. Including mitigation costs, the present value of global financial assets is an expected 0.2% higher when warming is limited to no more than 2 °C, compared with business as usual. The 99th percentile is 9.1% higher. Limiting warming to no more than 2 °C makes financial sense to risk-neutral investors—and even more so to the risk averse.

Suggested Citation

  • Dietz, Simon & Bowen, Alex & Dixon, Charlie & Gradwell, Philip, 2016. "Climate value at risk of global financial assets," LSE Research Online Documents on Economics 66226, London School of Economics and Political Science, LSE Library.
    • Handle: RePEc:ehl:lserod:66226
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    References listed on IDEAS

    as
    1. Simon Dietz & Nicholas Stern, 2015. "Endogenous Growth, Convexity of Damage and Climate Risk: How Nordhaus' Framework Supports Deep Cuts in Carbon Emissions," Economic Journal, Royal Economic Society, vol. 0(583), pages 574-620, March.
    2. Dietz, Simon & Stern, Nicholas, 2015. "Endogenous growth, convexity of damage and climate risk: how Nordhaus’ framework supports deep cuts in carbon emissions," LSE Research Online Documents on Economics 58406, London School of Economics and Political Science, LSE Library.
    3. Elisabeth J. Moyer & Mark D. Woolley & Nathan J. Matteson & Michael J. Glotter & David A. Weisbach, 2014. "Climate Impacts on Economic Growth as Drivers of Uncertainty in the Social Cost of Carbon," The Journal of Legal Studies, University of Chicago Press, vol. 43(2), pages 401-425.
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    More about this item

    Keywords

    environmental economics; governance;

    JEL classification:

    • F3 - International Economics - - International Finance
    • G3 - Financial Economics - - Corporate Finance and Governance

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