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INVESTMENTS
 12 Months Ended
Dec. 31, 2023
Investments, Debt and Equity Securities [Abstract]  
INVESTMENTS INVESTMENTS
a)    Fixed Maturities, Available for Sale

The following table provides the amortized cost and fair values of the Company's fixed maturities classified as available for sale:
Amortized
cost		Allowance for expected credit lossesGross
unrealized
gains		Gross
unrealized
losses		Fair
value
At December 31, 2023
Available for sale
U.S. government and agency$3,049,445 $— $13,211 $(55,128)$3,007,528 
Non-U.S. government729,761 (30)13,089 (18,861)723,959 
Corporate debt4,651,654 (10,438)49,434 (216,478)4,474,172 
Agency RMBS(1)
1,706,204 — 11,495 (83,038)1,634,661 
CMBS(2)
897,553 — 551 (58,408)839,696 
Non-agency RMBS165,910 (194)713 (13,033)153,396 
ABS(3)
1,265,187 (50)2,855 (25,021)1,242,971 
Municipals(4)
168,540 (47)414 (10,548)158,359 
Total fixed maturities, available for sale$12,634,254 $(10,759)$91,762 $(480,515)$12,234,742 
At December 31, 2022
Available for sale
U.S. government and agency$2,731,733 $— $5,386 $(97,789)$2,639,330 
Non-U.S. government612,546 — 2,395 (52,912)562,029 
Corporate debt4,680,798 (11,521)5,269 (418,990)4,255,556 
Agency RMBS(1)
1,297,423 — 4,663 (99,301)1,202,785 
CMBS(2)
1,029,863 — 60 (82,145)947,778 
Non-agency RMBS151,907 (123)275 (18,525)133,534 
ABS(3)
1,499,728 (35)555 (70,721)1,429,527 
Municipals(4)
172,475 (54)139 (16,205)156,355 
Total fixed maturities, available for sale$12,176,473 $(11,733)$18,742 $(856,588)$11,326,894 
(1)Residential mortgage-backed securities ("RMBS") originated by U.S. government-sponsored agencies.
(2)Commercial mortgage-backed securities ("CMBS").
(3)Asset-backed securities ("ABS") include debt tranched securities collateralized primarily by auto loans, student loans, credit card receivables and collateralized loan obligations ("CLOs").
(4)Municipals include bonds issued by states, municipalities and political subdivisions.
 
Contractual Maturities
Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties.
The table below provides the contractual maturities of fixed maturities classified as available for sale:
Amortized
cost		Fair
value		% of Total
fair value
At December 31, 2023
Maturity
Due in one year or less$474,557 $463,789 3.6 %
Due after one year through five years5,902,571 5,790,493 47.3 %
Due after five years through ten years2,064,619 1,954,449 16.0 %
Due after ten years157,653 155,287 1.3 %
8,599,400 8,364,018 68.2 %
Agency RMBS1,706,204 1,634,661 13.4 %
CMBS897,553 839,696 6.9 %
Non-agency RMBS165,910 153,396 1.3 %
ABS1,265,187 1,242,971 10.2 %
Total$12,634,254 $12,234,742 100.0 %
At December 31, 2022
Maturity
Due in one year or less$422,039 $409,972 3.7 %
Due after one year through five years5,349,123 5,078,273 44.8 %
Due after five years through ten years2,192,344 1,919,450 16.9 %
Due after ten years234,046 205,575 1.8 %
8,197,552 7,613,270 67.2 %
Agency RMBS1,297,423 1,202,785 10.6 %
CMBS1,029,863 947,778 8.4 %
Non-agency RMBS151,907 133,534 1.2 %
ABS1,499,728 1,429,527 12.6 %
Total$12,176,473 $11,326,894 100.0 %
Gross Unrealized Losses
The following table summarizes fixed maturities, available for sale in an unrealized loss position and the aggregate fair value and gross unrealized loss by length of time the security has continuously been in an unrealized loss position:
  12 months or greaterLess than 12 monthsTotal
  Fair
value		Unrealized
losses		Fair
value		Unrealized
losses		Fair
value		Unrealized
losses
At December 31, 2023
Fixed maturities, available for sale
U.S. government and agency$846,503 $(42,465)$867,733 $(12,663)$1,714,236 $(55,128)
Non-U.S. government233,038 (18,178)115,112 (683)348,150 (18,861)
Corporate debt2,623,304 (210,512)240,813 (5,966)2,864,117 (216,478)
Agency RMBS778,656 (80,070)218,606 (2,968)997,262 (83,038)
CMBS703,411 (54,856)75,242 (3,552)778,653 (58,408)
Non-agency RMBS98,483 (13,013)10,017 (20)108,500 (13,033)
ABS879,743 (24,747)83,582 (274)963,325 (25,021)
Municipals129,969 (10,156)6,238 (392)136,207 (10,548)
Total fixed maturities, available for sale$6,293,107 $(453,997)$1,617,343 $(26,518)$7,910,450 $(480,515)
At December 31, 2022
Fixed maturities, available for sale
U.S. government and agency$467,032 $(41,365)$1,414,181 $(56,424)$1,881,213 $(97,789)
Non-U.S. government207,637 (33,027)298,048 (19,885)505,685 (52,912)
Corporate debt1,562,355 (268,289)2,350,504 (150,701)3,912,859 (418,990)
Agency RMBS220,595 (40,469)771,191 (58,832)991,786 (99,301)
CMBS343,494 (40,888)599,877 (41,257)943,371 (82,145)
Non-agency RMBS75,137 (14,691)53,484 (3,834)128,621 (18,525)
ABS685,990 (48,913)686,190 (21,808)1,372,180 (70,721)
Municipals52,994 (10,120)96,003 (6,085)148,997 (16,205)
Total fixed maturities, available for sale$3,615,234 $(497,762)$6,269,478 $(358,826)$9,884,712 $(856,588)

At December 31, 2023, 3,535 fixed maturities (2022: 4,525) were in an unrealized loss position of $481 million (2022: $857 million) of which $13 million (2022: $64 million) was related to securities below investment grade or not rated.

At December 31, 2023, 3,212 fixed maturities (2022: 1,842) had been in a continuous unrealized loss position for twelve months or greater and had a fair value of $6,293 million (2022: $3,615 million).

The unrealized losses of $481 million (2022: $857 million) were due to non-credit factors and were expected to be recovered as the related securities approach maturity.

At December 31, 2023, the Company did not intend to sell the securities in an unrealized loss position and it is more likely than not that the Company will not be required to sell these securities before the anticipated recovery of their amortized costs.
b)    Fixed Maturities, Held to Maturity
The following table provides the amortized cost and fair values of the Company's fixed maturities classified as held to maturity:
Amortized
cost
Allowance for expected credit lossesNet carrying valueGross
unrealized
gains
Gross
unrealized
losses
Fair
value
At December 31, 2023
Held to maturity
Corporate debt$95,200 $— $95,200 $298 $(8,827)$86,671 
ABS(1)
591,096 — 591,096 5 (1,921)589,180 
Total fixed maturities, held to maturity$686,296 $— $686,296 $303 $(10,748)$675,851 
At December 31, 2022    
Held to maturity
Corporate debt$85,200 $— $85,200 $— $(11,428)$73,772 
ABS(1)
613,151 — 613,151 — (12,180)600,971 
Total fixed maturities, held to maturity$698,351 $— $698,351 $— $(23,608)$674,743 
(1)Asset-backed securities ("ABS") include debt tranched securities collateralized primarily by collateralized loan obligations ("CLOs").

At December 31, 2023, fixed maturities, held to maturity of $686 million (2022: $698 million) were presented net of an allowance for expected credit losses of $nil (2022: $nil).

The Company's ABS, held to maturity consist of CLO debt tranched securities. The Company uses a scenario-based approach to review its CLO debt portfolio and reviews subordination levels of these securities to determine their ability to absorb credit losses of the underlying collateral. If losses are forecast to be below the subordination level for a tranche held by the Company, the security is determined not to have a credit loss. At December 31, 2023 and 2022, the allowance for credit losses expected to be recognized over the life of the Company's ABS, held to maturity was $nil.

To estimate expected credit losses for corporate debt securities, held to maturity, the Company's projected cash flows are primarily driven by assumptions regarding the severity of loss, which is a function of the probability of default and projected recovery rates. The Company's default and recovery rates are based on credit ratings, credit analysis and macroeconomic forecasts. At December 31, 2023 and 2022, the allowance for credit losses expected to be recognized over the life of the Company's corporate debt, held to maturity was $nil.
Contractual Maturities
Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. ABS classified as held to maturity with a net carrying value of $591 million (2022: $613 million) do not have a single maturity date and cannot be allocated over several maturity groupings.

Corporate debt classified as held to maturity with a net carrying value of $95 million (2022: $81 million) is due between 3 years and 10 years and corporate debt classified as held to maturity with a net carrying value of $nil (2022: $4 million) is due after ten years.
c)    Equity Securities

The following table provides the cost and fair values of the Company's equity securities:
CostGross
unrealized
gains		Gross
unrealized
losses		Fair
value
At December 31, 2023
Equity securities
Common stocks$2,843 $101 $(398)$2,546 
Preferred stocks5,496 218 (113)5,601 
Exchange-traded funds182,989 105,858 (1,572)287,275 
Bond mutual funds352,505 4,119 (63,535)293,089 
Total equity securities$543,833 $110,296 $(65,618)$588,511 
At December 31, 2022
Equity securities
Common stocks$7,279 $636 $(442)$7,473 
Preferred stocks115 — (43)72 
Exchange-traded funds207,505 68,058 (5,757)269,806 
Bond mutual funds279,457 — (71,555)207,902 
Total equity securities$494,356 $68,694 $(77,797)$485,253 
d)    Mortgage Loans

The following table provides details of the Company's mortgage loans, held for investment:
  
December 31, 2023December 31, 2022
  
Carrying value% of TotalCarrying value% of Total
Mortgage loans held for investment:
Commercial$616,368 101 %$627,437 100 %
Allowance for expected credit losses
(6,220)(1 %)— — %
Total mortgage loans held for investment$610,148 100 %$627,437 100 %

The primary credit quality indicators for commercial mortgage loans are the debt service coverage ratio which compares a property’s net operating income to amounts needed to service the principal and interest due under the loan, (generally, the lower the debt service coverage ratio, the higher the risk of experiencing a credit loss) and the loan-to-value ratio which compares the unpaid principal balance of the loan to the estimated fair value of the underlying collateral (generally, the higher the loan-to-value ratio, the higher the risk of experiencing a credit loss). The debt service coverage ratio and loan-to-value ratio, as well as the values utilized in calculating these ratios, are updated quarterly.

The Company has a high quality mortgage loan portfolio with a weighted average debt service coverage ratio of 1.9x (2022: 2.3x) and a weighted average loan-to-value ratio of 71% (2022: 60%). At December 31, 2023 and 2022, there were no past due amounts associated with the commercial mortgage loans held by the Company.

On a quarterly basis, collateral dependent mortgage loans (e.g., when the borrower is experiencing financial difficulty, including when foreclosure is reasonably possible or probable) are evaluated individually for credit losses. The allowance for expected credit losses for a collateral dependent loan is established as the excess of amortized cost over the estimated fair value of the loan's underlying collateral, less selling cost when foreclosure is probable. Accordingly, the change in the estimated fair value of collateral dependent loans, which are evaluated individually for credit losses, is recognized as a change in the allowance for expected credit losses which is recorded in net investment gains (losses).

At December 31, 2023, there are two collateral dependent loans with estimated loan-to-value ratios in excess of 100%, resulting in an allowance for expected credit loss of $6 million (2022: $nil).
e)    Other Investments
The following table provides a summary of the Company's other investments, together with additional information relating to the liquidity of each category:
  Fair valueRedemption frequency
(if currently eligible)		Redemption
notice period
At December 31, 2023
Multi-strategy funds$24,619 3 %Quarterly
60-90 days
Direct lending funds192,270 20 %
Quarterly(1)
90 days
Private equity funds301,712 32 %n/an/a
Real estate funds317,325 33 %
Quarterly(2), Annually(3)
45-90 days
CLO-Equities5,300 1 %n/an/a
Other privately held investments108,187 11 %n/an/a
Total other investments$949,413 100 %
At December 31, 2022
Multi-strategy funds$32,616 3 %Quarterly
60-90 days
Direct lending funds258,626 26 %
Quarterly(1)
90 days
Private equity funds265,836 27 %n/an/a
Real estate funds298,499 30 %
Quarterly(2), Annually(3)
45-90 days
CLO-Equities5,016 — %n/an/a
Other privately held investments136,158 14 %n/an/a
Total other investments$996,751 100 %
n/a – not applicable
(1)Applies to one fund with a fair value of $17 million (2022: $39 million).
(2)Applies to one fund with a fair value of $66 million (2022: $73 million).
(3)Applies to one fund with a fair value of $25 million (2022: $27 million).
 
The investment strategies for the above funds are as follows:
 
•Multi-strategy funds: Seek to achieve above-market returns by pursuing multiple investment strategies to diversify risks and reduce volatility. This category includes funds of hedge funds which invest in a large pool of hedge funds across a diversified range of hedge fund strategies.
•Direct lending funds: Seek to achieve attractive risk-adjusted returns, including current income generation, by investing in funds which provide financing directly to borrowers.
•Private equity funds: Seek to achieve attractive risk-adjusted returns by investing in private transactions over the course of several years.
•Real estate funds: Seek to achieve attractive risk-adjusted returns by making and managing investments in real estate and real estate securities and businesses.
Two common redemption restrictions which may impact the Company's ability to redeem multi-strategy funds are gates and lockups. A gate is a suspension of redemptions which may be implemented by the general partner or investment manager of the fund in order to defer, in whole or in part, the redemption request in the event the aggregate amount of redemption requests exceeds a predetermined percentage of the fund’s net assets which may otherwise hinder the general partner or investment manager’s ability to liquidate holdings in an orderly fashion in order to generate the cash necessary to fund extraordinarily large redemption payouts. A lockup period is the initial amount of time an investor is contractually required to hold the security before having the ability to redeem. During 2023 and 2022, neither of these restrictions impacted the Company's redemption requests. At December 31, 2023, there were no multi-strategy fund holdings (2022: nil) where the Company is still within the lockup period.
At December 31, 2023, the Company had $28 million (2022: $26 million) of unfunded commitments as a limited partner in multi-strategy funds. Once the full amount of committed capital has been called by the General Partner of each of these funds, the assets will not be fully returned until after the completion of the funds' investment term. These funds have investment terms ranging from two years to the dissolution of the underlying fund.
At December 31, 2023, the Company had $192 million (2022: $183 million) of unfunded commitments as a limited partner in direct lending funds. Once the full amount of committed capital has been called by the General Partner of each of these funds, the assets will not be fully returned until the completion of the fund's investment term. These funds have investment terms ranging from four to ten years and the General Partners of certain funds have the option to extend the term by up to three years.
At December 31, 2023, the Company had $145 million (2022: $158 million) of unfunded commitments as a limited partner in private equity funds. The life of the funds is subject to the dissolution of the underlying funds. The Company expects the overall holding period to be over six years.

At December 31, 2023, the Company had $107 million (2022: $141 million) of unfunded commitments as a limited partner in real estate funds. These funds include an open-ended fund and funds with investment terms ranging from two years to the dissolution of the underlying fund.

At December 31, 2023, the Company had $30 million (2022: $16 million) of unfunded commitments as a limited partner in three private company investment funds focusing on financial services technology companies with an emphasis on insurance technology companies ("private company investment funds"). Two of these funds have investment terms of 5 years and one fund has an investment term of 10 years.

f)    Equity Method Investments

During 2023, the Company paid $22 million to acquire 18% of the common equity of Monarch Point Re (ISAC) Ltd. ("Monarch Point Re") and Monarch Point Re (ISA 2023) Ltd. (and collectively "Monarch Point Re"), a collateralized reinsurance company formed under the laws of Bermuda as an incorporated segregated accounts company under the Incorporated Segregated Accounts Companies Act 2019, as amended (the “ISAC Act”). Monarch Point Re is an independent reinsurer jointly sponsored by the Company and Stone Point Credit, LLC ("Stone Point").

The Company retrocedes a diversified portfolio of casualty reinsurance business to Monarch Point Re and Stone Point serves as its investment manager. The Company expects to benefit from underwriting fees generated by Monarch Point Re and the income and capital appreciation Stone Point seeks to deliver through its investment management services.

Monarch Point Re is not a Variable Interest Entity ("VIE") that is required to be included in the Company's consolidated financial statements. The Company accounts for its ownership interest in Monarch Point Re under the equity method of accounting.
During 2016, the Company paid $108 million including direct transaction costs to acquire 19% of the common equity of Harrington Reinsurance Holdings Limited ("Harrington"), the parent company of Harrington Re Ltd. ("Harrington Re"), an independent reinsurance company jointly sponsored by the Company and The Blackstone Group L.P. ("Blackstone").

Through long-term service agreements, the Company serves as Harrington Re's reinsurance underwriting manager and Blackstone serves as exclusive investment management service provider. As an investor, the Company expects to benefit from underwriting profit generated by Harrington Re and the income and capital appreciation Blackstone seeks to deliver through its investment management services. In addition, the Company has entered into an arrangement with Blackstone under which underwriting and investment related fees will be shared equally.

Harrington is not a VIE that is required to be included in the Company's consolidated financial statements. The Company accounts for its ownership interest in Harrington under the equity method of accounting. The Company's proportionate share of the underlying equity in net assets resulted in a basis difference of $5 million which represents initial transactions costs.

g)    Variable Interest Entities

In the normal course of investing activities, the Company actively manages allocations to non-controlling tranches of structured securities which are variable interests issued by VIEs. These structured securities include RMBS, CMBS and ABS.

The Company also invests in limited partnerships which represent 75% of the Company's other investments. The investments in limited partnerships include multi-strategy funds, direct lending funds, private equity funds, real estate funds and CLO equity tranched securities, which are variable interests issued by VIEs (refer to Note 5(e) 'Other Investments').

The Company does not have the power to direct the activities that are most significant to the economic performance of these VIEs. Therefore, the Company is not the primary beneficiary of these VIEs. The maximum exposure to loss on these interests is limited to the amount of commitment made by the Company. The Company has not provided financial or other support to these structured securities other than the original investment.

h)    Net Investment Income
Net investment income was derived from the following sources:
Year ended December 31,202320222021
Fixed maturities$514,842 $329,858 $262,049 
Other investments20,411 57,043 181,906 
Equity securities12,088 10,390 12,752 
Mortgage loans35,312 23,407 17,427 
Cash and cash equivalents50,261 20,273 4,454 
Short-term investments8,924 3,535 664 
Gross investment income641,838 444,506 479,252 
Investment expenses(30,096)(25,677)(24,951)
Net investment income$611,742 $418,829 $454,301 
 
i)    Net Investment Gains (Losses)
The following table provides an analysis of net investment gains (losses):
Year ended December 31,202320222021
Gross realized investment gains
Fixed maturities and short-term investments$32,920 $16,671 $137,729 
Equity securities16,847 7,687 5,413 
Gross realized investment gains49,767 24,358 143,142 
Gross realized investment losses
Fixed maturities and short-term investments(158,080)(328,493)(42,613)
Equity securities(639)(406)(696)
Gross realized investment losses(158,719)(328,899)(43,309)
(Increase) decrease in allowance for expected credit losses, fixed maturities, available for sale
974 (11,421)11 
(Increase) decrease in allowance for expected credit losses, mortgage loans
(6,220)— — 
Impairment losses(1)
(12,757)(12,568)(22)
Change in fair value of investment derivatives(2)
(1,456)7,656 4,346 
Net unrealized gains (losses) on equity securities53,781 (135,915)30,111 
Net investment gains (losses)$(74,630)$(456,789)$134,279 
(1)Related to instances where the Company intends to sell securities or it is more likely than not that the Company will be required to sell securities before their anticipated recovery.
(2)Refer to Note 7 'Derivative Instruments'.

The following table provides a reconciliation of the beginning and ending balances of the allowance for expected credit losses on fixed maturities classified as available for sale:
Year ended December 31,202320222021
Balance at beginning of period$11,733 $313 $323 
Expected credit losses on securities where credit losses were not previously recognized
5,200 17,830 95 
Additions (reductions) for expected credit losses on securities where credit losses were previously recognized
4,934 (3,831)50 
Impairments of securities which the Company intends to sell or more likely than not will be required to sell— — — 
Securities sold/redeemed/matured(11,108)(2,579)(155)
Balance at end of period$10,759 $11,733 $313 
Fixed Maturities
The Company evaluates available for sale securities for expected credit losses when fair value is below amortized cost. If the Company intends to sell or will be required to sell the security before its anticipated recovery, the full amount of the impairment loss is charged to net income (loss). If the Company does not intend to sell or will not be required to sell the security before its anticipated recovery, an allowance for expected credit losses is established and the portion of the loss that relates to credit losses is recorded in net income (loss).
A summary of credit loss activity by asset class, the significant inputs and the methodology used to estimate credit losses are described below.
U.S. Government, U.S. Agency and U.S. Agency RMBS
Unrealized losses on securities issued or backed, either explicitly or implicitly by the U.S. government are not analyzed for credit losses. The Company has concluded that the possibility of a credit loss on these securities is highly unlikely due to the explicit U.S. government guarantee related to certain securities (e.g., Government National Mortgage Association issuances) and the implicit guarantee related to other securities that has been validated by past actions (e.g., U.S. government bailout of Federal National Mortgage Association and Federal Home Loan Mortgage Corporation during the 2008 credit crisis).
Although these securities are not analyzed for credit losses, they are evaluated for intention to sell and likely requirement to sell.
Non-U.S. Government
Non-U.S. government securities are evaluated for expected credit losses primarily through qualitative assessments of the likelihood of credit losses using information such as severity of unrealized losses, credit ratings and price volatility. At December 31, 2023, the gross unrealized losses of $19 million included foreign exchange losses of $6 million. At December 31, 2023, the allowance for expected credit losses on non-U.S. government fixed maturities related to loss severity where the forecasted recovery to amortized cost is uncertain.
At December 31, 2022, the gross unrealized losses of $53 million included foreign exchange losses of $24 million. At December 31, 2022, the Company did not anticipate any credit losses on its non-U.S. government fixed maturities.
Corporate Debt
To estimate expected credit losses for corporate debt securities, the Company's projected cash flows are primarily driven by assumptions regarding the severity of loss, probability of default and projected recovery rates. The Company's default and loss severity rates are based on credit rating, credit analysis and macroeconomic forecasts. At December 31, 2023 and 2022, the allowance for expected credit losses on corporate debt securities mainly related to loss severity where the forecasted recovery to amortized cost was uncertain.
 
CMBS
The Company's investments in CMBS are diversified and primarily rated AA or better. At December 31, 2023, CMBS had a weighted average estimated subordination percentage of 37% (2022: 38%). Based on discounted cash flows at December 31, 2023 and 2022, the current level of subordination is sufficient to cover the estimated loan losses on the underlying collateral of the CMBS.
Non-agency RMBS
To estimate expected credit losses for non-agency RMBS, the Company's projected cash flows incorporated underlying data from widely accepted third-party data sources along with certain internal assumptions and judgments regarding the future performance of the security. These assumptions included default, delinquency, loss severity and prepayment rates.
At December 31, 2023, the fair value of the Company's non-agency RMBS was $153 million (2022: $134 million), consisting primarily of $34 million (2022: $39 million) of Prime and $100 million (2022: $76 million) of Alt-A, Non-qualified, and Home Equity MBS. At December 31, 2023 and 2022, the allowance for expected credit losses on non-agency RMBS related to loss severity where the forecasted recovery to amortized cost is uncertain.
ABS

The Company's investments in ABS consist mainly of CLO debt tranched securities ("CLO Debt") purchased primarily as new issues between 2018 and 2023. Substantially all of these new issues had credit ratings of AA or better. The Company utilizes a scenario-based approach to review its CLO Debt portfolio based on the current asset market price. The Company also reviews subordination levels of these securities to determine their ability to absorb credit losses of underlying collateral. If losses are forecast to be below the subordination level for a tranche held by the Company, the security is determined not to have a credit loss. At December 31, 2023 and 2022, the allowance for expected credit losses on ABS related to loss severity where the forecasted recovery to amortized cost is uncertain.

Municipals

Municipal securities are evaluated for expected credit losses primarily through qualitative assessments of the likelihood of credit losses using information such as severity of unrealized losses, credit ratings and price volatility. At December 31, 2023 and 2022, the allowance for expected credit losses on municipals related to loss severity where the forecasted recovery to amortized cost is uncertain.
j)    Restricted Assets
In order to support the Company's obligations in regulatory jurisdictions where it operates as a non-admitted carrier, the Company provides collateral in the form of assets held in trust and, to a lesser extent, letters of credit (refer to Note 10(c) 'Debt and Financing Arrangements').
In addition, the Company operates in the Lloyd’s market through its corporate members, AXIS Corporate Capital UK Limited and AXIS Corporate Capital UK II Limited, which provide 70% and 30%, respectively of Syndicate 1686's capital support. Lloyd’s sets capital requirements for corporate members annually through the application of a capital model that is based on regulatory rules pursuant to Directive 2009/138/EC of the European Parliament and of the Council of 25 November 2009 on the taking up and pursuit of business of Insurance and Reinsurance (Solvency II) ("Solvency II").
The capital provided to support underwriting, or Funds at Lloyd’s ("FAL"), may be satisfied by cash, certain investments and letters of credit provided by approved banks (refer to Note 12 'Commitments and Contingencies' and Note 22 'Statutory Financial Information').
At December 31, 2023, collateral held in trust for third-party agreements of $2,598 million (2022: $2,491 million) included $550 million (2022: $539 million) of fixed maturities, and cash of $296 million (2022: $217 million) held on deposit to support the underwriting activities of Syndicate 1686.
The Company's restricted investments and cash primarily consist of high-quality fixed maturity and short-term investment securities.
The table below provides the fair values of the Company's restricted investments and cash:
At December 31,20232022
Collateral in trust for inter-company agreements
$614,089 $790,449 
Collateral for secured letter of credit facility423,522 424,624 
Funds at Lloyd's893,177 748,573 
Collateral in trust for third-party agreements
2,597,633 2,491,317 
Securities on deposit or in trust with regulatory authorities772,472 731,660 
Total restricted investments and cash$5,300,893 $5,186,623 

 k)    Reverse Repurchase Agreements
At December 31, 2023, the Company held $12 million (2022: $nil) of reverse repurchase agreements. These loans are fully collateralized, are generally outstanding for a short period of time and are presented on a gross basis as part of cash and cash equivalents in the Company's consolidated balance sheets. The required collateral for these loans is either cash or U.S. Treasuries at a minimum rate of 102% of the loan principal. Upon maturity, the Company receives principal and interest income. The Company monitors the estimated fair value of the securities loaned and borrowed on a daily basis with additional collateral obtained as necessary throughout the duration of the transaction.