B is the correct answer as IAMs are particularly suited to link projections of greenhouse gas emissions and transition risk drivers to impacts on economic growth. In this scenario, the bank is looking to understand the risks associated with a transition away from fossil fuels, a type of risk IAMs can help assess.

A is incorrect because IAMs do not accurately capture extreme weather economic impacts. This type of risk would be better evaluated using other models or risk assessment methods designed to capture the economic impacts of extreme weather events.

C is incorrect because while IAMs can model economic impacts of greenhouse gas emissions and transition risk drivers, they are not best suited for modeling the impacts of sudden regulatory changes. Other methods, such as sensitivity analysis, could be more appropriate for this purpose.

D is incorrect because IAMs generally understate the severity associated with future climate events and are less useful for one-time catastrophic events. A more suitable approach might involve stress testing or scenario analysis that takes into account such extreme events.

Things to Remember

• Integrated Assessment Models (IAMs) are used to link projections of greenhouse gas emissions and transition risk drivers to impacts on economic growth.
• IAMs have limitations, such as their inability to accurately capture extreme weather economic impacts and their tendency to understate the severity associated with future climate events.
• Other models or risk assessment methods may be more appropriate for evaluating specific types of risks, such as extreme weather events or sudden regulatory changes.
• Sensitivity analysis can be used to assess the impacts of sudden regulatory changes on a firm’s exposure to certain industries.
• Stress testing and scenario analysis are useful tools for evaluating the impact of one-time catastrophic events on a firm's portfolio.