Calibration testing
Predicted default or claim probabilities are compared with observed rates by band, using binomial and other tests suited to the sample size.
GRA · Riesgo de la IA y de los modelos financieros
Spatial financeDonde el capital se encuentra con la amenaza, la exposición y la transición
Probability and statistics underpin financial models: estimating default and claim rates, testing calibration, measuring discrimination and detecting drift. On this platform they supply the measures and tests that show whether a model is performing as intended.
Probability and statistics provide the mathematical framework for describing uncertainty and learning from data. They underpin estimation, testing and prediction in every risk discipline. In artificial intelligence and financial stability, statistical methods quantify the likelihood and uncertainty of losses across interconnected sistemas. They make the evidence behind risk decisions explicit and reproducible. The canonical description is on el bien común CTIM.
Predicted default or claim probabilities are compared with observed rates by band, using binomial and other tests suited to the sample size.
Population stability and distribution distance measures are computed between periods to detect shifts in model inputs and scores.
Outcome and error rates are compared across groups with confidence intervals, so differences are not read from noise.
Las vistas de exposición, pérdida, escenarios y capital que pediría un responsable de riesgos, un supervisor o un ministerio de finanzas, con los marcos con arreglo a los cuales informan. Las estructuras siguen la práctica supervisora y actuarial. Los valores son ilustrativos: nunca precios, calificaciones ni asesoramiento.
How a shock in Probability and statistics for AI and financial model risk reaches credit, market, underwriting, liquidity and operational risk, and feeds back.
Datasets and records used by probability and statistics on this platform, with the role each plays and the label its values carry. Sources are listed in el registro de fuentes.
| Datos | Función | Etiqueta |
|---|---|---|
| Decision and outcome records | Performance testing | OBSERVADO |
| Score distributions | Drift detection | OBSERVADO |
| Reference portfolios | Benchmarks | NOTIFICADO |
Process explorer · Process
10 steps·5 etapas
Proceso
Los modelos de catástrofes suelen tener módulos de amenaza, vulnerabilidad, exposición y financiero, y producen tablas de pérdidas, la pérdida anual media, curvas de excedencia, la PML y el TVaR.
Esquema de una norma o un método externos, a partir de sus fuentes públicas. Describe lo que dice el marco, no un registro de ninguna ejecución. No demuestra que Nexus ni ningún socio realice, certifique o apruebe un paso. Una puerta es un paso del método, nunca una aprobación de Nexus.
Results are checked through diagnostics, cross-validation and sensitivity to assumptions. Independent replication confirms findings.
| Verificación | Cómo se hace |
|---|---|
| Sample size | Tests state power and minimum sample sizes |
| Multiple testing | Many simultaneous tests are corrected for chance findings |
| Out-of-sample | Performance is reported on data not used for fitting |
Inference depends on assumptions about independence, distribution and sampling that may not hold. Small or biased samples limit reliability.
Ciencia y modelización de sistemas stewards probability and statistics for the Consortium and reviews how it is applied across platforms.
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