Expectiles as basis risk-optimal payment schemes in parametric insurance
Abstract
Abstract Payments in parametric insurance are linked to an index and thus decoupled from policyholders’ true losses. While this principle has appealing operational benefits compared to indemnity coverage, i.e. being efficient and cost effective, a downside is the discrepancy between payouts and actual damage, called basis risk. We show that in an asymmetrically weighted mean square error framework, the basis risk-minimizing payment schemes for pure parametric and parametric index insurance contracts can be expressed as conditional expectiles of policyholders’ true loss given a compensation-triggering incident. We provide connections to stochastic orderings and demonstrate that regression approaches allow easy implementation in practice. The results are visualized in parametric coverage for cyber risks and agricultural insurance.
Fields of Study & Subjects
Insurance and Financial Risk Management
Insurance
Mortality
Demography
Risk Management
Publication details
- Journal / source
- European Actuarial Journal
- Publisher
- Springer Science and Business Media LLC
- Volume
- 16
- Issue
- 1
- Pages
- 3–36
- Publication date
- 26 February 2026
- Language
- EN