The client needed to determine the credit rating impact due to increased frequency of wildfires, impacting the value of property pledged as collateral, the Loan-to-Value (LTV) ratios, and the overall Probability of Default (PD).
Solytics developed a robust risk assessment model:
- Segmenting the portfolio by location and risk levels to build representative mortgage portfolios.
- Estimating Hazard Rates and Return Periods for wildfires and subsequent changes in property values under RCP 4.5 and RCP 8.5 scenarios (2°C and 4°C average temperature increase).
- Calculating risk-to-property values under different climate scenarios and extreme events.
- Adjusting original property values by the risk-to-property value, to arrive at revised LTV ratios.