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📈 '''SOFR''' — the Secured Overnight Financing Rate — is a benchmark [[Definition:Interest rate | interest rate]] that has become the dominant reference rate in the United States following the phase-out of LIBOR, with direct implications for how [[Definition:Insurance carrier | insurers]] and [[Definition:Reinsurance | reinsurers]] value their [[Definition:Investment portfolio | investment portfolios]], price certain products, and structure financial transactions. In insurance, SOFR matters because carriers are among the largest institutional investors in fixed-income securities, and the rates embedded in bonds, loans, and [[Definition:Derivative | derivatives]] on their balance sheets increasingly reset against SOFR rather than the now-defunct London Interbank Offered Rate. Any shift in the benchmark ripples through [[Definition:Reserves | reserve]] discounting, [[Definition:Asset-liability management | asset-liability management]], and the economics of [[Definition:Insurance-linked security (ILS) | insurance-linked securities]].

🔄 SOFR is calculated daily by the Federal Reserve Bank of New York based on overnight repurchase agreement transactions collateralized by U.S. Treasury securities, making it a nearly risk-free rate grounded in actual market activity rather than bank estimates. Insurers encounter SOFR in multiple contexts: floating-rate notes and bank loans in their investment portfolios reset to SOFR-based terms; [[Definition:Catastrophe bond | catastrophe bonds]] and other [[Definition:Insurance-linked security (ILS) | ILS]] structures often use SOFR plus a spread to define the return paid to investors; and intercompany or [[Definition:Holding company | holding-company]] financing facilities frequently reference SOFR as the base rate. The transition from LIBOR required carriers to renegotiate or amend contract language across thousands of instruments, a process overseen by compliance, legal, and treasury teams in coordination with [[Definition:Insurance regulator | regulators]] who wanted assurance that the switch would not create unintended mismatches in policyholder obligations.

💡 For actuaries and chief investment officers at insurance companies, SOFR's behavior influences core financial metrics. Because SOFR is an overnight rate without the embedded [[Definition:Credit risk | credit-risk]] premium that LIBOR carried, spreads on floating-rate instruments have been recalibrated, affecting [[Definition:Investment income | investment income]] projections that feed into [[Definition:Premium | premium]] adequacy analysis and [[Definition:Dividend | dividend]] capacity. Regulators including the [[Definition:National Association of Insurance Commissioners (NAIC) | NAIC]] have updated statutory accounting guidance to accommodate SOFR-linked instruments, and [[Definition:Rating agency | rating agencies]] evaluate how smoothly a carrier has navigated the transition as part of their enterprise-risk-management assessments. In short, SOFR is now woven into the financial fabric of the U.S. insurance industry in much the same way LIBOR once was — understanding it is essential for anyone involved in carrier finance, [[Definition:Reinsurance | reinsurance]] structuring, or [[Definition:Capital markets | capital-markets]] activity.

'''Related concepts:'''
{{Div col|colwidth=20em}}
* [[Definition:Interest rate risk]]
* [[Definition:Asset-liability management]]
* [[Definition:Insurance-linked security (ILS)]]
* [[Definition:Catastrophe bond]]
* [[Definition:Investment portfolio]]
* [[Definition:LIBOR]]
{{Div col end}}

Definition:SOFR - Revision history

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