Excess layer pricing
Losses above a threshold are fitted with a generalised Pareto distribution to price excess-of-loss layers, showing how threshold choice moves the price.
GRA · 精算与量化风险
空间金融资本与危害、风险暴露和转型的交汇之处
Extreme value theory models the tails of loss and hazard distributions. On this platform it supports large-loss pricing, catastrophe hazard, 操作风险 and capital at high confidence levels, with threshold choice and uncertainty made explicit.
Extreme value theory and 尾部风险 study the behaviour of rare, high-impact events. They provide methods to estimate the magnitude and frequency of extremes beyond the range of observed data. In insurance and catastrophe, methods and modelling and capital markets and investment, extreme value methods set design levels and capital buffers for rare events. Tail dependence analysis reveals when extremes in different 系统 tend to occur together. The canonical description is on STEM Commons.
Losses above a threshold are fitted with a generalised Pareto distribution to price excess-of-loss layers, showing how threshold choice moves the price.
Value at risk and tail value at risk at regulatory confidence levels are estimated from fitted tails, with parameter uncertainty reported.
Covariates such as time or climate indices are added to extreme value models to test whether tails are changing over time.
哪些地方在严重年份造成损失,以及损失向再保险蔓延的程度。示意性设计数值。
团队遵循该方法时会使用的界面:其指标、状态与决策。名称为示例,数值仅作示意。
Actuarial and quantitative risk · Extreme value theory and tail risk · Run R-3811
generalised Pareto fit
| Shape ξ | 0.18 | −0.02 | 0.45 | heavy tail if above zero |
| Scale σ | 2.1 | 0.9 | 6.0 | units of the variable |
| Exceedances | 123 | declustered |
Fits are checked with diagnostic plots, goodness-of-fit tests and out-of-sample comparison. Sensitivity to threshold and record length is reported.
| 核查 | 如何开展 |
|---|---|
| Threshold stability | Parameters are checked across thresholds |
| Interval reporting | Confidence intervals accompany return levels |
| Stationarity tests | Trends are tested before stationary fits are used |
Extrapolation far beyond the data is highly uncertain. Changing climates and markets violate stationarity assumptions.
处于覆盖范围内的投资组合每年预期损失,以及保险公司和贷款机构定价所依据的 1/100 和 1/250 水平下的预期损失,均来自每个 巨灾模型 uses. Teaching model with stated illustrative values, not a prediction. The map on this page shows Japan and Korea; the model itself is not tied to a place.
控制措施
读数
| 重现期(年) | 强度(强度指数) | 损失(占价值的 %) |
|---|---|---|
| 1 | 0.09 | 0.00 |
| 2 | 1.27 | 0.00 |
| 4 | 1.91 | 0.00 |
| 7 | 2.47 | 0.00 |
| 13 | 3.00 | 0.00 |
| 24 | 3.51 | 0.00 |
| 44 | 4.02 | 0.00 |
| 82 | 4.53 | 23.55 |
| 154 | 5.03 | 26.44 |
| 287 | 5.53 | 28.87 |
| 536 | 6.03 | 30.88 |
| 1,000 | 6.53 | 32.53 |
The model runs on the teaching values set by the controls. To calibrate it for a place, read it against these admitted layers and series, which this page’s map can draw:
贯穿六大支柱,由 Nexus Consortium 牵头
Assembled from the Nexus Standards area profile 保险与再保险: the shocks it names, the 系统 and sectors that carry the loss, the controls that dampen it and the data that observe it. Pick an initiating shock and step through the cascade to see which exposures it reaches and where losses could concentrate. The Map view places the run on an example geography with open data. Every weight is a stated assumption. An exercise, not a forecast, a valuation, a rating or investment advice. To model a place of your own choosing, open the full System Builder.
灾害
控制措施
NS-0 章程与原则NS-3 风险记录 UNI(语法、旧编码对照、分配机构)NS-9 情境 UNI(部署、实例、计划实例)NS-10 政策和条款(机器可读的义务:定义、约束、评估和执行)NS-11 验证与监测(证据、证明、零信任符合性观测)NS-14 符合性及与外部标准的对照NRS-F3 保险、巨灾风险与保护缺口NRS-H113 危害类别:金融体系脆弱性(NHS-1 soc.financial-system)NRS-U17 宇宙 platform profile: Insurance NexusNRS-H71 危害类别:深时与宇宙灾难(NHS-1 planet.deep-time)NRS-H65 危害类别:超越行星边界(NHS-1 planet.boundary)NRS-F8 参数化与指数型风险转移观测
示例地理范围
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 losses from extreme value theory and tail risk for actuarial and quantitative risk grow with severity, gross and net of reinsurance, against capital.
| 重现期 | 年概率 | 总损失 | 净损失 | 净额,资本 = 100 |
|---|---|---|---|---|
| 1/10(10 年一遇) | 0.10 | 14 | 10 | 10 |
| 1/50(50 年一遇) | 0.02 | 33 | 21 | 21 |
| 1/100(100 年一遇) | 0.01 | 46 | 27 | 27 |
| 1/250(250 年一遇) | 0.004 | 68 | 39 | 39 |
| 年均损失 | 3.1 | 2.2 | 2.2 |
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.
切勿发送个人数据、敏感基础设施细节或您无权分享的任何内容。贡献在使用前会经过审查;发送贡献不赋予署名权或编辑权,赞助也绝不能换取研究结论。
本网站上的地图、数据和图表仅作为背景和一般信息展示。它们不是建议、预测或预警;信息的局限见免责声明和数据说明。
This site uses only strictly necessary cookies to work and to remember your privacy choices. Nothing loads from other companies, and we never sell or share your personal information.
This site uses only strictly necessary cookies to work and to remember your privacy choices. Nothing loads from other companies, and we never sell or share your personal information. We run no advertising. You can review your choices at any time through Privacy choices at the foot of every page.