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💹 '''Mark-to-market valuation''' is the practice of measuring an insurer's assets — and, where applicable, certain liabilities — at their current market prices rather than at historical cost or amortized book value. In the insurance industry, this approach underpins the economic [[Definition:Balance sheet | balance sheet]] required by [[Definition:Solvency II | Solvency II]], where assets must generally be valued at the amount for which they could be exchanged between knowledgeable, willing parties in an arm's-length transaction. Similar fair-value principles appear under [[Definition:IFRS 17 | IFRS]] standards, [[Definition:US GAAP | US GAAP]] fair value hierarchies, and Bermuda's [[Definition:Bermuda Monetary Authority (BMA) | BMA]] economic balance sheet framework.

📊 In operation, mark-to-market valuation draws on observable prices from active, liquid markets — exchange-traded equities, government bonds, and listed [[Definition:Corporate bond | corporate bonds]] with regular trading activity. When a reliable quoted price exists, it sits at the top of the [[Definition:Fair value hierarchy | fair value hierarchy]] (Level 1 under both IFRS and US GAAP). The insurer's investment accounting team or [[Definition:Asset manager | asset manager]] reprices the portfolio at each reporting date, flowing unrealized gains and losses through either the income statement or other comprehensive income depending on the applicable accounting standard and asset classification. For [[Definition:Non-life insurance | property-casualty]] insurers with large liquid bond and equity portfolios, the vast majority of invested assets can be marked to market straightforwardly. The challenge intensifies for holdings in less liquid instruments — [[Definition:Structured finance | structured securities]], [[Definition:Private placement | private placements]], or [[Definition:Real estate | real estate]] — where observable prices may be stale, thin, or nonexistent, pushing the valuation toward [[Definition:Mark-to-model valuation | mark-to-model]] techniques.

⚠️ Mark-to-market valuation introduces volatility into the insurer's reported [[Definition:Own funds | own funds]] and [[Definition:Solvency ratio | solvency ratio]], because asset values fluctuate with markets while many [[Definition:Insurance contract liability | insurance liabilities]] move on different drivers. A sharp rise in interest rates, for example, may reduce the market value of a bond portfolio immediately, even if the insurer intends to hold those bonds to maturity and will ultimately recover par. This tension has fueled longstanding debate among regulators and the industry about procyclicality — the risk that mark-to-market swings force insurers to sell assets or raise capital at the worst possible moment. Solvency II addresses this partly through the [[Definition:Volatility adjustment | volatility adjustment]] and [[Definition:Matching adjustment | matching adjustment]], which dampen the liability discount rate impact. For [[Definition:Risk management | risk management]] and [[Definition:Capital management | capital management]] teams, understanding the interplay between mark-to-market asset movements and liability valuations is essential to avoiding knee-jerk reactions to short-term market noise.

'''Related concepts:'''
{{Div col|colwidth=20em}}
* [[Definition:Mark-to-model valuation]]
* [[Definition:Fair value hierarchy]]
* [[Definition:Solvency II]]
* [[Definition:Own funds]]
* [[Definition:Volatility adjustment]]
* [[Definition:Asset-liability management (ALM)]]
{{Div col end}}

Definition:Mark-to-market valuation - Revision history

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