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🧮 '''Mark-to-model valuation''' refers to the practice of estimating the fair value of an insurance company's assets or liabilities using internal models, assumptions, and analytical techniques when observable market prices are unavailable or unreliable. In the insurance sector, this approach is pervasive — not only for illiquid invested assets such as [[Definition:Private placement | private placements]], [[Definition:Infrastructure debt | infrastructure debt]], and [[Definition:Mortgage loan | mortgage loans]], but also for the liabilities side of the [[Definition:Balance sheet | balance sheet]], where [[Definition:Technical provisions | technical provisions]] under frameworks like [[Definition:Solvency II | Solvency II]] and [[Definition:IFRS 17 | IFRS 17]] are inherently model-driven because insurance obligations do not trade in active markets. The term is sometimes described as Level 3 valuation within the [[Definition:Fair value hierarchy | fair value hierarchy]], though Level 2 valuations that rely on adjusted observable inputs also involve significant modeling.

🔧 The process typically involves selecting an appropriate valuation model — discounted cash flow, option-pricing, or comparable-transaction analysis — and populating it with a mix of observable market data and unobservable assumptions. For an insurer valuing a portfolio of [[Definition:Catastrophe bond | catastrophe bonds]] or [[Definition:Insurance-linked securities (ILS) | insurance-linked securities]], the model might use observable yield curves alongside proprietary [[Definition:Catastrophe model | catastrophe model]] outputs for expected loss estimates. On the liability side, calculating [[Definition:Best estimate liability (BEL) | best estimate liabilities]] under Solvency II requires projecting future cash flows using assumptions about [[Definition:Mortality rate | mortality]], [[Definition:Morbidity | morbidity]], [[Definition:Lapse rate | lapse rates]], expenses, and [[Definition:Policyholder behavior | policyholder behavior]] — none of which can be directly observed in a market. Governance requirements are stringent: Solvency II's [[Definition:Prudent person principle | prudent person principle]] and the Delegated Regulation demand independent validation, documented methodologies, and sensitivity analysis for any mark-to-model valuation. The [[Definition:National Association of Insurance Commissioners (NAIC) | NAIC]] in the United States and supervisors in Asian markets impose analogous expectations around model governance and audit trails.

⚠️ Because mark-to-model valuations rely on judgment and assumptions, they carry inherent [[Definition:Model risk | model risk]] — the possibility that errors in methodology, calibration, or data produce valuations that diverge materially from economic reality. The 2007–2009 financial crisis illustrated this danger vividly, as structured credit instruments that had been marked to model turned out to be worth far less than reported. For insurers, the stakes are high: overstated asset values inflate [[Definition:Own funds | own funds]] and [[Definition:Solvency ratio | solvency ratios]], while understated [[Definition:Insurance contract liability | liabilities]] mask the true cost of promises to policyholders. Regulators accordingly require insurers to maintain robust [[Definition:Model validation | model validation]] frameworks, use conservative assumptions where uncertainty is greatest, and disclose the extent of model-derived valuations in their [[Definition:Solvency and financial condition report (SFCR) | public reporting]]. [[Definition:Insurtech | Insurtech]] firms offering valuation platforms and data services have found a growing market in helping carriers automate, standardize, and govern these complex calculations.

'''Related concepts:'''
{{Div col|colwidth=20em}}
* [[Definition:Mark-to-market valuation]]
* [[Definition:Fair value hierarchy]]
* [[Definition:Model risk]]
* [[Definition:Best estimate liability (BEL)]]
* [[Definition:Technical provisions]]
* [[Definition:Model validation]]
{{Div col end}}

Definition:Mark-to-model valuation - Revision history

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