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📈 '''Yield to maturity''' (YTM) is the total annualized return an investor can expect on a [[Definition:Fixed-income security | fixed-income security]] — such as a bond or note — if it is held until its maturity date and all coupon and principal payments are made as scheduled. Within the insurance industry, YTM is a critical metric because insurers are among the world's largest institutional holders of bonds, and the yields embedded in their [[Definition:Investment portfolio | investment portfolios]] directly influence [[Definition:Reserves | reserve]] adequacy, product pricing, and [[Definition:Policyholder dividend | policyholder returns]]. Whether an insurer operates under [[Definition:US GAAP | US GAAP]], [[Definition:IFRS 17 | IFRS 17]], or local statutory accounting frameworks, the yield assumptions applied to asset portfolios shape the discount rates used to value long-tail [[Definition:Insurance liability | insurance liabilities]].

⚙️ YTM is calculated by solving for the discount rate that equates the present value of a bond's future cash flows — periodic coupon payments plus the face value returned at maturity — to its current market price. For an insurer's [[Definition:General account | general account]], portfolio managers track the book yield (based on purchase prices) alongside market YTM to assess whether reinvestment opportunities are accretive or dilutive relative to existing obligations. When prevailing yields decline, as they did across developed markets during much of the 2010s, insurers face reinvestment risk: maturing bonds and incoming [[Definition:Premium | premium]] cash flows must be deployed at lower rates, compressing the spread between asset returns and credited or guaranteed rates on [[Definition:Life insurance | life]] and [[Definition:Annuity | annuity]] products. Conversely, rising rate environments — such as the sharp increases seen globally in 2022–2023 — improve prospective yields on new purchases but depress the market value of existing holdings, creating [[Definition:Unrealized loss | unrealized losses]] that affect regulatory capital calculations under frameworks like [[Definition:Solvency II | Solvency II]] and [[Definition:Risk-based capital (RBC) | risk-based capital]] standards.

💡 Understanding YTM is essential for anyone involved in insurance [[Definition:Asset-liability matching | asset-liability management]], [[Definition:Investment risk | investment strategy]], or financial reporting. Actuaries rely on yield curves — constructed from YTMs across various maturities — to select appropriate discount rates for [[Definition:Reserving | reserving]] and [[Definition:Embedded value | embedded value]] calculations. Under IFRS 17, for instance, the choice between a bottom-up approach (risk-free yield curve plus an illiquidity premium) and a top-down approach (reference portfolio yield minus a credit risk adjustment) directly determines how insurance contract liabilities appear on the balance sheet. In Japan and several European markets, prolonged periods of ultra-low or negative yields forced regulators to intervene with transitional measures and adjusted valuation rules to prevent artificial volatility in insurers' solvency ratios. For [[Definition:Property and casualty insurance | property and casualty]] insurers, the relationship between YTM and loss reserve duration influences whether they pursue an [[Definition:Underwriting profit | underwriting profit]] strategy or rely partly on investment income from the [[Definition:Float | float]] generated by collected premiums held before claims are paid.

'''Related concepts:'''
{{Div col|colwidth=20em}}
* [[Definition:Investment portfolio]]
* [[Definition:Asset-liability matching]]
* [[Definition:Discount rate]]
* [[Definition:Interest rate risk]]
* [[Definition:IFRS 17]]
* [[Definition:Reinvestment risk]]
{{Div col end}}

Definition:Yield to maturity - Revision history

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