Illustrative: event footprints crossing a portfolio, losses rising and the exceedance-probability curve

Risk Academy, led by the Nexus Consortium · Finance and Economics

Insurance, reinsurance and protection gaps

Insurance, reinsurance and protection gaps covers how risk is pooled and transferred through insurance and reinsurance: underwriting and pricing, property and casualty, life and health, reinsurance structures, catastrophe accumulation, solvency and capital, Takaful and insurtech, and the protection gaps where losses are not insured.

Map insurance, reinsurance and protection gaps on a real place

01Model

The model, step by step

The model

From a loss tail to a premium: return-period losses, capital and the price of cover

DataModelGateDecisionStandard it teachesStandard it relies onNeighbouring discipline

6 steps
Combined ratio at that premium
71%
Events per year
0.50
Tail shape
1.8
Expected annual loss (million)
56.3
/

The model From a loss tail to a premium: return-period losses, capital and the price of cover

02Scope

What the discipline covers

The subtopics its courses and labs teach.

Insurance, reinsurance and protection gaps: 0 primary courses open, 2 in preparation and 2 also taught here, across 9 subtopics and 4 connected disciplines. Courses: RAN-310 L2 in preparation, RAT-226 L2 in preparation, RAN-313 L2 also taught here, RAT-218 L3 also taught here.20L1L2L3L42
Insurance, reinsurance and protection gaps at a glance
  • Open, 0
  • In preparation, 2
  • Also taught here, 2
  • Subtopics, 9
Course codes from the curriculum; study levels L1 to L4.
Courses
In development
Levels
L2 Intermediate
Labs
Exposure lab, Trigger lab, Map lab
  • Underwriting and pricing
  • Property and casualty
  • Life and health insurance
  • Reinsurance structures
  • Catastrophe accumulation
  • Protection gaps
  • Takaful
  • Insurtech and AI
  • Solvency and capital
03The discipline

The field and its scope

For underwriters, actuaries, brokers, risk managers and policy staff who need to understand how risk is pooled, priced and transferred, and why some losses are not insured.

04Measures

Quantities and units

05Methods

Methods and their limits

Each method is listed with what it assumes and where it fails.

06Debates

What the field debates

07Bodies and data

Bodies that set practice, and the data they publish

Bodies and standards are named so learners can find and apply their published work; the Academy teaches their use and links to the publisher, and no affiliation is implied.

08Simulator

Run the discipline's simulator

Insurance, reinsurance and protection gaps's own model, as a live chart: move each parameter and read how the outputs respond.

09Maps

Build a twin of any place

Search any place or open the world; the layers and generators follow insurance, reinsurance and protection gaps on the planet map, the globe and in 3D.

Houston and the Ship Channel: a flat plan of the faculty twin. Terrain 0 to 66 m; 30 power plants, 11,875 MW; 7 refineries and chemical works; 2 port land; 29 named works; 154 named industrial sites; Surface water extent, OPERA DSWx (HLS): read live when the 3D twin opens; Built-up and settlement extent, HBASE 2010: read live when the 3D twin opens. Contours every 10 metres from the elevation grid; power plants as marks; refineries, terminals and industrial sites as marks.
Houston and the Ship Channel, United States. Flat plan of the same data: relief as contours from the inline grid, the plants by capacity, the industrial points by kind and the numbers below. The 3D twin opens on devices with WebGL once its data and library have been checked.
  • Terrain 0 to 66 m
  • 30 power plants, 11,875 MW
  • 7 refineries and chemical works
  • 2 port land
  • 29 named works
  • 154 named industrial sites
  • Surface water extent, OPERA DSWx (HLS): read live when the 3D twin opens
  • Built-up and settlement extent, HBASE 2010: read live when the 3D twin opens
Credits and dates per layer are listed under the stage. Relief in the twin is exaggerated ×1.5 for legibility.

Drag to move, right drag or Shift with a drag to turn and tilt, Ctrl with the wheel to zoom. Keyboard: arrows move, Shift with arrows turn and tilt, + and - zoom, 0 resets, V steps through the views, Escape clears.

Flat plan of the same data: relief as contours from the inline grid, the plants by capacity, the industrial points by kind and the numbers below. The 3D twin opens on devices with WebGL once its data and library have been checked.

The boundaries, names and designations shown do not imply any judgement on the legal status of any territory, or any endorsement or acceptance of such boundaries. Countries: Natural Earth (public domain).

10Nexus Standards

Nexus Standards it teaches and relies on

The Nexus Standards the discipline teaches toward, grouped by master standard, with the disciplines that teach each.

11Research hub

Research hub: papers, preprints and datasets

Open scholarly sources searched with the subject terms of Insurance, reinsurance and protection gaps.

Search termsInsurance, reinsurance and protection gaps; Underwriting and pricing; Property and casualty; Life and health insurance; Reinsurance structures; Catastrophe accumulationDerived from the Risk Academy page on Insurance, reinsurance and protection gaps.

  • OpenAlexlisted for reference; not queried
  • Crossreflisted for reference; not queried
  • DataCitelisted for reference; not queried
  • Zenodolisted for reference; not queried
  • arXivlisted for reference; not queried
  • Europe PMClisted for reference; not queried
  • OpenAIRE Graphlisted for reference; not queried

No source is enabled for live display on this site yet: the sources are listed for reference and none is queried. Once the publisher of record enables a source after its terms are reviewed, recent works are listed here. Metadata and links only: title, authors, venue, year, type, open-access status and licence as each source records them; works are listed for orientation, not reviewed or endorsed.

12Hub

Research and tools

Research and preprints as they are published, by discipline, with the faculty's other tools.

The hub lists the newest research and preprints for Insurance, reinsurance and protection gaps, each with its source and date. Open the research hub

13Methods and standards

The methods it teaches

From the Academy's risk taxonomy: the discipline's own entries and those of its primary courses, with how many courses teach each.

Methods and practice

  1. Catastrophe modelling1 course
  2. Probability, return periods and loss metrics1 course

Frameworks and standards

  1. Risk-based insurance solvency regimes1 course
14What is changing now

What is changing now

Recent developments in insurance, reinsurance and protection gaps, each with its source; sources checked on 16 October 2026.

15Courses

Courses in this discipline

Courses for this discipline are in development; until they open, study it through the connected courses and open lessons below.

Courses with this primary disciplineIn development

  1. RAN-310Risk in Insurance and ReinsuranceIn developmentNexus, L2 Intermediate, 12 hours (estimate)
  2. RAT-226Risk Financing and Transfer: Insurance, Parametric Cover and PoolsIn developmentTechnical, L2 Intermediate, 10 hours (estimate)
16Also taught here

Courses from connected disciplines that also teach this field

Each course has its primary discipline elsewhere and teaches this field as part of its scope.

From connected disciplinesIn development

  1. RAN-313Agricultural Risk ManagementIn developmentNexus, L2 Intermediate, 10 hours (estimate), primary discipline: Food systems and agriculture
  2. RAT-218Cyber Risk QuantificationIn developmentTechnical, L3 Advanced, 10 hours (estimate), primary discipline: Cybersecurity and digital resilience
17Labs

How the subject is practised in labs

LabWhat you do in itCourses using it
Exposure labOverlay people and assets with hazard footprints2
Trigger labSet forecast thresholds, pre-agreed actions and messages2
Map labRead hazard, exposure and boundaries on real maps1
18Technology in this area

How technology helps and what risk it brings

19Achievements

Achievements in this discipline

21Where this is practised

Where the subject is practised

22Practised in

The two Nexus Foundry systems where it is practised

  • Nexus FoundryGRIx systemHazard, exposure and loss data for underwritingData room
  • DSS systemCatastrophe scenarios and event setsScenarios room

Nexus Foundry system pages describe what each system and its rooms are designed to do; the courses teach the methods these systems apply.

23Connected disciplines

Disciplines it depends on

24Across the ecosystem

Across the ecosystem

26References

Core references and where to begin

Start with Rothschild, then Kunreuther, then Grossi.

NRNexus Reports gateway · GW-ACADEMY

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Nexus Reports 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.

Risk Academy
Insurance, reinsurance and protection gaps

Prepare with a related course

Open courses in connected disciplines teach the methods this discipline will build on.

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