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 · 人工智能与金融模型风险
空间金融资本与危害、风险暴露和转型的交汇之处
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 系统. They make the evidence behind risk decisions explicit and reproducible. The canonical description is on STEM Commons.
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.
风险官、监管者或财政部会要求的风险暴露、损失、情景和资本视图,以及它们据以报告的框架。结构遵循监管和精算实务。数值为说明性:绝非价格、评级或建议。
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 来源登记册.
| 数据 | 角色 | 标签 |
|---|---|---|
| Decision and outcome records | Performance testing | 观测 |
| Score distributions | Drift detection | 观测 |
| Reference portfolios | Benchmarks | 已报告 |
Process explorer · Process
10 steps·5 个阶段
流程
巨灾模型通常包括危害、脆弱性、风险暴露与财务模块,并生成损失表、 年均损失、超越曲线、PML 与 TVaR。
依据公开来源对某一外部标准或方法的概述。它描述的是该框架的内容,而非任何运行记录。它并不表明 Nexus 或任何合作伙伴执行、认证或批准某一步骤。关口是该方法的一个步骤,绝不是 Nexus 的批准。
Results are checked through diagnostics, cross-validation and sensitivity to assumptions. Independent replication confirms findings.
| 核查 | 如何开展 |
|---|---|
| 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.
系统科学与建模 stewards probability and statistics for the Consortium and reviews how it is applied across platforms.
报告 is the Consortium’s quarterly publication. What you know about this subject can become evidence, a case or a correction in the next edition, credited to you and published under CC BY 4.0 where it is your own work.
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