Biggest changeWe classify all fixed maturities as available-for-sale securities, allowing us to meet our liquidity needs and provide greater flexibility to appropriately respond to changes in market conditions. 37 Table of Contents The following tables show our fixed maturity investments by rating (1) : At December 31, 2023 (dollars in thousands) Amortized cost Fair value Percent of total AAA, AA, A $ 537,751 $ 515,175 54 % BBB 324,538 318,362 33 Total investment grade 862,289 833,537 87 BB 51,564 50,170 5 B 65,453 65,251 7 CCC, CC, C, and below 13,247 12,283 1 Total non-investment grade 130,264 127,704 13 Total $ 992,553 $ 961,241 100 % At December 31, 2022 (dollars in thousands) Amortized cost Fair value Percent of total AAA, AA, A $ 518,088 $ 479,413 54 % BBB 318,801 300,900 33 Total investment grade 836,889 780,313 87 BB 45,784 41,978 5 B 66,574 62,530 7 CCC, CC, C, and below 11,888 9,840 1 Total non-investment grade 124,246 114,348 13 Total $ 961,135 $ 894,661 100 % (1) Ratings are supplied by S&P, Moody's, and Fitch.
Biggest changeThe following tables show our fixed maturity investments by rating (1) : At December 31, 2024 (dollars in thousands) Amortized cost Fair value Percent of total AAA, AA, A $ 584,600 $ 564,443 54 % BBB 328,561 326,990 31 Total investment grade 913,161 891,433 85 BB 71,000 70,845 7 B 68,944 69,068 6 CCC, CC, C, and below 17,684 17,203 2 Total non-investment grade 157,628 157,116 15 Total $ 1,070,789 $ 1,048,549 100 % At December 31, 2023 (dollars in thousands) Amortized cost Fair value Percent of total AAA, AA, A $ 537,751 $ 515,175 54 % BBB 324,538 318,362 33 Total investment grade 862,289 833,537 87 BB 51,564 50,170 5 B 65,453 65,251 7 CCC, CC, C, and below 13,247 12,283 1 Total non-investment grade 130,264 127,704 13 Total $ 992,553 $ 961,241 100 % (1) Ratings are supplied by S&P, Moody's, and Fitch with the exception of held-to-maturity securities, which are unrated.
The volatility and liquidity in the markets in which the underlying assets are traded directly influence market risk. The following is a discussion of our primary risk exposures, including interest rate risk, investment credit risk, concentration risk, liquidity risk, and equity price risk, and how those exposures are currently managed as of December 31, 2023.
The volatility and liquidity in the markets in which the underlying assets are traded directly influence market risk. The following is a discussion of our primary risk exposures, including interest rate risk, investment credit risk, concentration risk, liquidity risk, and equity price risk, and how those exposures are currently managed as of December 31, 2024.
Interest Rate Risk We invest primarily in fixed maturity investments, which comprised 85% of our invested assets at December 31, 2023. The value of the fixed maturity portfolio is subject to interest rate risk. As market interest rates decrease, the value of the portfolio increases with the opposite holding true in rising interest rate environments.
Interest Rate Risk We invest primarily in fixed maturity investments, which comprised 84% of our invested assets at December 31, 2024. The value of the fixed maturity portfolio is subject to interest rate risk. As market interest rates decrease, the value of the portfolio increases with the opposite holding true in rising interest rate environments.
Fixed maturities interest-rate sensitivity analysis (dollars in thousands) At December 31, 2023 2022 Fair value of fixed maturity portfolio $ 961,241 $ 894,661 Fair value assuming 100-basis point rise in interest rates $ 935,444 $ 868,919 Effective duration (as a percentage) 2.7 2.9 36 Table of Contents While the fixed maturity portfolio is sensitive to interest rates, the future principal cash flows that will be received by contractual maturity date are presented below at December 31, 2023 and 2022.
(dollars in thousands) 2024 2023 Fair value of fixed maturity portfolio $ 1,048,549 $ 961,241 Fair value assuming 100-basis point rise in interest rates $ 1,018,957 $ 935,444 Effective duration (as a percentage) 2.9 2.7 36 Table of Contents While the fixed maturity portfolio is sensitive to interest rates, the future principal cash flows that will be received by contractual maturity date are presented below at December 31, 2024.
The table is based upon the lowest rating for each security. We are also exposed to a concentration of credit risk with the Exchange. See the "Transactions/Agreements with Related Parties, Intercompany Receivables" section of Item 7. "Management's Discussion and Analysis of Financial Condition and Results of Operations" contained within this report for further discussion of this risk.
The table is based upon the lowest rating for each security. 37 Table of Contents We are also exposed to a concentration of credit risk with the Exchange. See the "Transactions/Agreements with Related Parties, Intercompany Receivables" section of Item 7.
Concentration Risk While our portfolio is well diversified within each market sector, there is an inherent risk of concentration in a particular industry or sector. We continually monitor our level of exposure to individual issuers as well as our allocation to each industry and market sector against internally established policies. See the "Financial Condition" section of Item 7.
We continually monitor our level of exposure to individual issuers as well as our allocation to each industry and market sector against internally established policies. See the "Financial Condition" section of Item 7. "Management's Discussion and Analysis of Financial Condition and Results of Operations" contained within this report for details of investment holdings by sector.
Equity securities are exposed to the risk of potential loss in estimated fair value resulting from an adverse change in prices ("price risk"). We do not hedge our exposure to price risk inherent in our equity investments. 38 Table of Contents
We do not hedge our exposure to price risk inherent in our equity investments. 38 Table of Contents
However, we actively manage the maturity profile of our fixed maturity portfolio such that scheduled repayments of principal occur on a regular basis. Equity Price Risk Our portfolio of equity securities, which primarily includes nonredeemable preferred stock, is carried on the Statements of Financial Position at estimated fair value.
Equity Price Risk Our portfolio of equity securities, which primarily includes nonredeemable preferred stock, is carried on the Consolidated Statements of Financial Position at estimated fair value. Equity securities are exposed to the risk of potential loss in estimated fair value resulting from an adverse change in prices ("price risk").
If not externally rated, we rate them internally on a basis consistent with that used by the rating agencies.
If not externally rated, we rate them internally on a basis consistent with that used by the rating agencies. We classify the vast majority of our fixed maturities as available-for-sale securities, allowing us to meet our liquidity needs and provide greater flexibility to appropriately respond to changes in market conditions.
"Management's Discussion and Analysis of Financial Condition and Results of Operations" contained within this report for details of investment holdings by sector. Liquidity Risk Periods of volatility in the financial markets can create conditions where fixed maturity investments, despite being publicly traded, can become illiquid.
Liquidity Risk Periods of volatility in the financial markets can create conditions where fixed maturity investments, despite being publicly traded, can become illiquid. However, we actively manage the maturity profile of our fixed maturity portfolio such that scheduled repayments of principal occur on a regular basis.