Moody’s: Using Scenario Analysis to Assess Credit Impact of Climate Risks

Climate-driven extreme weather events and the transition to a low-carbon economy are expected to have material impacts on companies, with increasing significance for credit analysis. However, both physical and transition risks have a wide range of potential outcomes. To better understand the credit implications and prepare for climate risks it is important to assess the rage of possible outcomes for a given sector or company.

In its report, Climate scenarios vital to assess credit impact of carbon transition, physical risks, Moody’s Investors Service describes a conceptual approach to scenario analysis, leveraging Four Twenty Seven’s methodology for physical risks. The transition risk approach begins by assessing the sector-specific credit implications of national commitments to the Paris Agreement based on the IEA Stated Policies Scenario (STEPS). The second step is to assess the implications of a more ambitious transition scenario to see how firms may be affected by more rapid decarbonization.  This step leverages the IEA’s Sustainable Development Scenario.

For physical climate risk, Moody’s leverages Four Twenty Seven’s approach for exploring the range of potential outcomes in the next 30 years. It’s important to note that in the near-term the uncertainty in physical outcomes is not driven by policy changes, but rather by scientific uncertainty within the climate models. The climate takes a long time to fully respond to greenhouse gases in the atmosphere, so physical climate events in the next few decades will be driven by carbon dioxide that’s already been released. By grouping the outcomes of climate models within a single RCP into low, medium and high tiers one can explore the range of potential severity in climate hazards such as extreme temperature and precipitation. Moody’s will use data from Four Twenty Seven that follows this approach to provide a uniform starting point from which to explore the range of credit implications of different climate hazards across sectors.

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To learn more about scenario analysis for physical climate risks read Four Twenty Seven’s paper, Demystifying Climate Scenario Analysis for Financial Stakeholders and check out solutions for investors, banks and corporations to manage their climate risk.