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📊 '''Homogeneous risk group (HRG)''' is a classification unit used in insurance [[Definition:Actuarial science | actuarial]] and regulatory practice to cluster [[Definition:Insurance policy | policies]] or [[Definition:Insurance contract | contracts]] that share sufficiently similar risk characteristics — such as [[Definition:Peril | peril]] type, [[Definition:Policyholder | policyholder]] demographics, contract duration, and expected [[Definition:Claims | claims]] behavior — so that they can be measured and valued collectively. The concept is central to the calculation of [[Definition:Technical provisions | technical provisions]] under both [[Definition:Solvency II | Solvency II]] and [[Definition:International Financial Reporting Standards (IFRS) | IFRS 17]], where insurers must segment their portfolios into groups that produce reliable and meaningful estimates of future cash flows rather than treating each individual contract in isolation or lumping together fundamentally different risks.

⚙️ Under Solvency II, insurers are required to segment their obligations into homogeneous risk groups as a foundational step before projecting the [[Definition:Best estimate | best estimate]] of liabilities and the associated [[Definition:Risk margin | risk margin]]. The grouping criteria typically consider the [[Definition:Line of business | line of business]], the nature of the underlying risk drivers, and the contractual features that influence the timing and amount of cash flows. [[Definition:IFRS 17 | IFRS 17]] imposes a parallel but distinct requirement: insurance contracts must be grouped into portfolios of contracts with similar risks and managed together, then further subdivided by [[Definition:Profitability | profitability]] cohorts and annual issuance cohorts. While the granularity and specific rules differ between the two frameworks, both demand that the groups be genuinely homogeneous — meaning the variation of risk within a group should be materially smaller than the variation between groups. Actuaries use statistical techniques, experience studies, and judgment to define boundaries, and these choices are subject to supervisory review by the relevant [[Definition:National competent authority (NCA) | national competent authority]].

💡 Getting the definition of homogeneous risk groups right has material financial consequences. Groups drawn too broadly may mask cross-subsidies between profitable and loss-making segments, leading to mispriced [[Definition:Reserves | reserves]] and potentially obscuring emerging adverse trends until they become severe. Groups drawn too narrowly can introduce excessive statistical volatility and computational burden without improving accuracy. For insurers operating across multiple jurisdictions — say a European [[Definition:Insurance group | group]] reporting under both Solvency II for regulatory purposes and IFRS 17 for consolidated financial reporting — reconciling the two sets of grouping requirements adds an additional layer of complexity. Robust data infrastructure and well-documented segmentation methodologies are therefore not just technical necessities but strategic assets that affect reported [[Definition:Solvency ratio | solvency ratios]], financial results, and the credibility of [[Definition:Embedded value | embedded value]] disclosures.

'''Related concepts:'''
{{Div col|colwidth=20em}}
* [[Definition:Technical provisions]]
* [[Definition:Best estimate]]
* [[Definition:IFRS 17]]
* [[Definition:Solvency II]]
* [[Definition:Risk margin]]
* [[Definition:Line of business]]
{{Div col end}}

Definition:Homogeneous risk group (HRG) - Revision history

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