Climate Risk Measurement and Management
Measuring risk
Climate risk measurement combines scenario analysis, stress testing, and exposure mapping. Key metrics include carbon footprint (Scope 1, 2, 3), financed emissions, physical asset exposure (location-based hazard mapping), and portfolio alignment. Scope 3 (value-chain) emissions usually dominate for financial institutions but are the hardest to measure - a common trap is understating them.
Transmission channels
Physical and transition risks transmit to credit (default probability, collateral values), market (repricing of assets, stranded assets), liquidity, and operational risk. Stranded assets are assets that lose value prematurely due to transition (e.g. fossil reserves).
Management tools
Levers include portfolio decarbonisation, engagement/stewardship, insurance, diversification, and setting targets. Risk appetite statements should embed climate limits. Double counting across scopes and across portfolios is a measurement pitfall.
Worked example
Rule of thumb: a 1-in-100-year flood event maps to an annual exceedance probability of 1%. If a bank's mortgage book has 10% exposure in a flood zone, expected annual loss ≈ exposure × probability × loss-given-default - a simple stress-test starting point.
Traps
- Treating climate risk as a single risk type rather than a driver of traditional risks.
- Ignoring Scope 3 and financed emissions.
- Confusing backward-looking footprint with forward-looking alignment.