Presentation on theme: "Securitization, Insurance, and Reinsurance J. David Cummins Temple University Conférence en Finance et Assurance du Fonds Conrad-Leblanc, Université Laval."— Presentation transcript:
Securitization, Insurance, and Reinsurance J. David Cummins Temple University Conférence en Finance et Assurance du Fonds Conrad-Leblanc, Université Laval April 1, 2011 Copyright J. David Cummins, 2011.
Outline of Presentation The catastrophe risk financing problem Reinsurance: The traditional risk warehouse model The risk warehouse: strengths and limitations Pricing with correlated risks Securitization: Focus on insurance-linked bonds Financing risk through securitization Strengths and weaknesses Reinsurance and CAT bonds: Market size & pricing Conclusions
The Catastrophe Risk Financing Problem
Number of Worldwide Insured Catastrophes No. Cats increases from 300 per year. Source: Swiss Re (2010).
Worldwide Insured Catastrophe Losses Cat losses increase from $100B. Source: Swiss Re (2010).
Fifteen Most Costly Insured Disasters Worldwide: (2008$) Disasters: 13 of top 15 since 1990, 8 of top 15 since 2000 Source: Swiss Re (2009, 2010).
Financing Catastrophes: Conclusions & Questions Costs of catastrophes have increased over time Significant increases in both frequency and severity Can the global (re)insurance industry adequately finance this type of risk? Resources of insurers and reinsurers Market imperfections impeding risk financing Can securitization play a significant role in financing catastrophes?
Reinsurance: The Traditional Model for Financing Catastrophic Risk
Traditional Insurer Model: Risk-Warehousing and Risk-Bearing Risk Warehouse: Primary Insurer Internal Risk Diversification Risk-Bearing: Equity Capital Hedgers: Individuals & Firms Risk Transfer & Premium Contingent Payment Shareholders: Portfolio Diversif. Equity Capital Dividends Risk Warehouse: Reinsurer Contingent Payment Risk Transfer & Premium
How the Risk Warehouse Works Hedgers transfer risks to the risk warehouse The risk warehouse internalizes risk diversification Across policyholders Across lines of insurance Geographically Diversification does not eliminate all risk Some risk is transferred to reinsurers but reinsurance can be expensive, so residual risk remains Residual risk is borne by the insurers stockholders, who diversify by holding stocks and bonds in other industries across the economy
Limitations of Risk Warehousing Risk warehouses are very efficient in handling relatively small, independent risks & many larger risks that are not correlated Factors exist that create inefficiencies such that warehousing may become too costly Events causing extremely large losses relative to the (re)insurance industrys equity capital Risks that are correlated (theory of insurance is mostly based on independent risks) Capital market imperfections that raise the cost of capital for insurers and reinsurers
Limitations of Risk Warehousing II Premium = E(L) + Expense Loading + Risk Loading Risk loading = Required capital*Cost of capital Large risks and correlated risks raise the required capital for a given insolvency or VaR target Capital market imperfections for such risks raise the costs of capital Therefore, the risk loading may be excessive, destroying gains from trade in the insurance market
Illustrating Effects of Correlated Risks on Cost of Capital and Insurance Pricing Diversification and pricing illustrated using a simple mean-variance model Insurance portfolio consists of N risks, X 1,..., X N Risks have finite means and variances Risks have pairwise covariances which are not necessarily equal to 0 The average mean in the sample is, the average variance is and the average covariance is In the limit, the sum of the risks is assumed to approach normality Results would hold even more strongly for skewed risks
Assumptions About the Insurer Insurer is assumed to set premiums to cover expected losses plus a risk-charge The risk charge is calculated to achieve a target probability of insolvency, ε (Tail VaR) The insurer raises equity capital in the capital market at unit price
Why Is Ruin Probability Not = 0? Capital is costly due to Agency costs of operating an insurance company Regulatory costs Corporate income taxation Informational asymmetries between insurers and capital market Accounting rules regarding treatment of reinsurance, etc. Therefore, insurer does not hold enough capital to reduce insolvency probability to zero
Calculating Ruin Probability: Central Limit Theorem
Equity Capital Per Policy to Achieve Ruin Target: Correlated Risks Equity capital per policy to achieve ruin probability target = ε.
Capital Per Policy: Limiting Value Therefore, unlike the case of independent risks, the risk charge does not go to zero in the limit
Cost of Capital for New Policies
Cost of Capital for New Policies: Discussion Incorporates the conventional CAPM beta term Adds a term reflecting non-systematic covariability with existing risk portfolio Adds a term for the contribution of the new risk (risk i) to portfolio return skewness Again this does not have to be market systematic risk in the conventional CAPM sense Model is based on Froot, Journal of Risk and Insurance (2007).
Why Non-Systematic Risk is Priced Non-systematic covariability and skewness risk increase the probability that the firm will need to raise external capital due to loss shocks External capital is more expensive than internal capital (retained earnings) Following a shock, cost of external capital rises, leading insurers to have to pass up attractive projects Therefore, policies with high contributions to covariability and skewness have higher costs of capital Insurance buyers are more sensitive to insolvency risk than bond holders in corporations because insurer insolvency not diversifiable for buyers
Why Is External Capital More Costly Informational asymmetries between insurers and capital markets Insurer knows more about its risk exposure and project riskiness than investors Investors demand a premium to protect against possibly higher risk levels Agency costs of monitoring managers who may act in their own interests rather than the owners interests Insurers invest in informationally intensive, illiquid assets that cannot be fully hedged in financial markets, e.g., liability insurance policies, catastrophe insurance
Capital, Convexity, and Risk Premia Information asymmetries, agency costs and other factors lead to convex costs of raising new capital Per unit cost of capital increases in the amount of capital required The risk premia ( ) are Increasing in convexity of the cost of capital Decreasing in the amount of internal funds held Thus, firms with high costs of external funds and relatively low capital charge higher prices Helps to explain (re)insurance underwriting cycles
Premium With Correlated Risks Expenses assumed to equal zero.
Premium With Correlated Risks: XOL Reinsurance Effects of covariability likely to be larger for excess of loss (XOL) reinsurance, which is more risky and highly skewed Payoff to XOL reinsurance is similar to a call option spread: Where X R = reinsurance payoff α = coinsurance proportion M = point of attachment (lower strike) U = coverage limit (upper strike) U > M
Premium with Correlated Risks: Assumptions for Illustration Portfolio of identically distributed risks Frequency distribution: Poisson (λ = 0.1) Severity distribution: Lognormal (μ = 10, σ = 0.8) Average correlation among risks varies from 0 to 0.35 in increments of 0.05 Lognormal Mean = 30,333.3 Standard deviation = 28,720.3 Total claims distribution Mean = 3,033.3 Standard deviation = 13,209.7
Premium with Correlated Risks: Assumptions for Illustration Cost of capital 10% to illustrate CAPM-type cost of capital 15% to illustrate cost of capital with loadings for non- systematic covariability and skewness Premiums for a layer of reinsurance Attachment point M = 25,000 Upper limit U = 45,000 Expected value of loss in the layer =
Premium with Correlated Risks: Function of Average Correlation and Cost of Capital Premium/Expected Loss, Reinsurance Layer, Ruin Probability = 0.001
Premiums with Correlated Risks: Conclusions Risk correlations raise the amount of capital required to achieve a specified probability of ruin Moderate correlations (5% or 10%) produce premiums 1.5 to 2.5 times the expected loss Higher correlations (e.g., 20%) produce premiums 2.5 to 3.25 times the expected loss Raising the cost of capital also increases the premium significantly At 10% risk correlation, raising cost of capital from 10% to 15% raises the premium by 25% Therefore, correlations and capital costs can lead to severe insurance market problems
Traditional Reinsurance Model: Advantages Internalizing the benefits of law of large numbers, reinsurers achieve a high degree of diversification High diversification means that a small amount of equity capital can support policy limits many hundreds of times large than the capital itself By warehousing over a period of time, the reinsurer accumulates significant amounts of information on underwriting, pricing, and risk management Economies of scale in information acquisition & analysis Provides information to clients at low cost
Reinsurance Model: Disadvantages Warehousing reinsurance contracts internally creates information opacities with securities markets Increases informational asymmetries Raises the cost of capital Reinsurer capital costs are high because of agency costs, corporate income taxation, and other factors Reinsurance market subject to underwriting cycles – periodic pricing and availability problems Reinsurance market not efficient for correlated, highly skewed risks that are large relative to industry capital
Securitization: A New Model for Financing Catastrophic Risk
Securitization: Resolving Reinsurance Market Inefficiencies Risks that are correlated within reinsurance markets may be uncorrelated with other economic risks Magnitude of largest insured risks is large relative to equity capital of reinsurers But small relative to capitalization of securities markets $100 billion event has probability of 1 to 2% $100 billion is large relative to reinsurer equity but < 0.5% of value of US stock and bond markets Securitization can reduce or eliminate credit risk that is present in reinsurance markets
Hybrid and Securitized Products Hybrid products Industry loss warranties (ILWs) Sidecars Collateralized reinsurance Securitized products CAT futures and options Insurance-linked swaps CAT bonds Other insurance-linked bonds (e.g., auto insurance) Contingent capital Mortality and longevity bonds
Securitization Through Insurance-Linked Bonds Hedgers transfer risks to the risk warehouse (reinsurer) Risk warehouse retains some risks through internal diversification, equity capital, and reinsurance Efficient to securitize some risks Risk transferred to special purpose vehicle (SPV) and held off-balance-sheet SPV issues securities to investors and receives proceeds SPV puts proceeds in trust, invested in safe assets SPV issues a call option (XOL reinsurance) to reinsurer Insurer pays premium (expected loss + risk spread) to SPV SPV pays premium to investors
For correlated risks (e.g., catastrophes), reinsurance premiums may be too high Such risks are large relative to reinsurer capital Capital needed to achieve ruin target raise prices Securitization transfers risk to investors holding broadly diversified portfolios CAT risk small relative to securities markets CAT risk uncorrelated with most events that move markets Therefore, CAT bonds valuable for diversification CAT bonds are a pure-play on catastrophe risk Not exposed to frictional costs of investing in insurer equity capital Securitization Through Insurance-Linked Bonds II
Insurance-linked bonds are fully collateralized On occurrence of event, funds are released to reinsurer If no event, funds returned to investors at maturity Full collateralization: Advantages Limited counterparty credit risk contingent on Credit quality of swap counterparty Appropriate restrictions on investment of SPV assets Funds available quickly following an event Full collateralization: Disadvantage? Amount of coverage = funds in SPV No leveraging of equity capital as in traditional reinsurance Securitization Through Insurance-Linked Bonds III
Why Use a Special Purpose Vehicle? The SPV is a passive financial intermediary that exists to Insulate investors from sponsors credit risk Provide transparent servicing of asset/liability Structure tranches of debt to appeal to different classes of investors Insulate investors from agency costs of issuer, creating a pure play security Provide tax and accounting benefits to sponsor
Insurance-Linked Bonds: Advantages to Investors Low correlations with other types of investments such as stocks, bonds, mortgage-backed securities Full collateralization reduces credit risk Provide a pure play in catastrophe risk Less complex and more transparent than mortgage backed securities and CDOs Lower moral hazard than mortgage-backed securities Issuing reinsurer remains responsible for covered risks, providing incentives for proper risk management Reinsurer and investors have incentive to invest trust assets in safe securities
Insurance-Linked Bonds and Reinsurance: Market Size and Pricing
Global Reinsurers: Resources In 2009: $426 billion equity, $161 billion premiums
Top 10 Global Reinsurers: 2009 Group NameCountryGross Premiums Swiss ReSwitzerland$32,462 Munich ReGermany$22,892 Hannover ReGermany$13,341 Berkshire HathawayU.S.$11,399 Lloyd's of LondonU.K.$9,732 SCORFrance$8,314 RGA ReinsuranceU.K.$5,725 TransatlanticU.K.$3,986 Partner ReBermuda$3,942 Everest ReBermuda$3,929 Source: A.M. Best 2010 Global Reinsurance Special Report, September 6, 2010.
Global Reinsurers: Equity & CAT Losses Dollar values deflated to 2009 real values using the CPI. Equity from S&P GRH (various years), CAT Losses from Swiss Re (2010).
Reinsurance Cycles: World Rate on Line Index for Cat Reinsurance Rate on line = Premium/Maximum Contract Payout Source: Guy Carpenter (2010).
Reinsurance Rates on Line: Comment Rates on line are Highly cyclical Correlated across national markets, reflecting the truly global market for reinsurance Tend to spike after large catastrophes such as Andrew (1992) World Trade Center (2001) Katrina-Rita-Wilma (2005) Rate on line spikes correlated with supply restrictions
CAT Bonds: New Issue Volume & Deals Source: Swiss Re (2010), GC Securities (2008). A.M. Best Reinsurance Study (2008), AON (2009), 2010 data through July 31.
CAT Bonds: Risk Capital Outstanding Source: Swiss Re (2010), 2010 data through July 31.
Reinsurance: Post-Disaster Capital Raising Source: Guy Carpenter (2009).
CAT Bond Investors Year-ending June 30, 2010
CAT Bonds By Peril Year-ending June 30, 2010
Example: The Mexican CAT Bond In March 2006, the Mexican government purchased $US 450M earthquake catastrophe coverage $160 million was raised through a CAT bond Parametric bond – payoff based on earthquake characteristics Bond premium very low: 2.5% Reflects diversification relative to peak risks in the U.S., Europe, and Japan, i.e., Mexico off peak
The Mexican CAT Bond Characteristics Class A NotesClass B Notes Principal:US$150MUS$10M Covered Territory:Zone BZones A and C Annual Expected Loss:0.96%0.93% Principal Reduction Mechanism:Binary Binary, first Zone to Trigger Rating (S&P):BB+ Investor Spread (bps)LIBOR + LIBOR +  Multiple (spread/exp loss)
CAT Bonds vs. Reinsurance: Why Price Comparison is Difficult CAT bonds usually multi-year whereas reinsurance tends to be for one year Reinsurance contracts contain reinstatement provisions whereas CAT bonds usually do not CAT bonds have very low or no credit risk whereas reinsurance has credit risk
CAT Bond Pricing: Premium/Expected Loss Source: Lane Financial (2010).
Reinsurance Prices: Rate on Line versus Loss on Line Source: Guy Carpenter.
CAT Bond Yields vs. Reinsurance In the 1 to 2% loss on line range, reinsurance price spreads versus Cat bond spreads 2005: 4 to 6 reinsurance vs 2 to 3 Cat bonds 2006: 7 to 13 reinsurance vs 5 to 7 Cat bonds 2007: 4 to 5 reinsurance vs 4 to 5 Cat bonds 2008: 3 to 4 reinsurance vs 3 for Cat bonds Therefore, Cat bonds are priced comparably with reinsurance in recent years
Yields: CAT Bonds & Corporates (BB)
CAT Bond Yields vs. BB Corporates During most of period, CAT bonds priced comparable to corporates However, during significant part of the period, CAT bonds had higher yields CAT bond yields also more volatile than for corporates In part, reflects thinness of market
CAT Bonds: Explaining the Spreads Original pricing argument: CAT risk is zero-beta Therefore, CAPM implies pricing at the risk-free rate However, spreads are much higher than risk-free rate – why does this happen? Novelty premium – investor unfamiliarity – however, we now have dedicated CAT mutual funds High costs of issuance – however, cost have declined So the reason is ????
CAT Bonds: Explaining the Spreads Habit-based consumption CAPM (Campbell and Cochrane, 1999; Dieckmann, 2008) Investor risk aversion increases as consumption falls towards its long-run habit level Therefore, investors are averse to assets that have low payoffs during adverse states of the world (economic downturns or catastrophes)
Explaining the Spreads: Habit-Based Consumption Model Campbell and Cochrane (1999), Dieckmann (2008). Utility determined by present value of consumption
Consumption-Based Pricing Model II Relationship between consumption and habit determined by the surplus consumption ratio S t 0 corresponds to unfavorable state of the world
Consumption-Based Pricing Model III Relative risk aversion in this model is: S t 0 corresponds to very high investor risk aversion
Implications of Consumption-Based Model Investor risk aversion increases as consumption falls towards its long-run habit level Therefore, investors averse to assets that have low payoffs during adverse states of the world (economic downturns) Dieckmann provides evidence that natural catastrophes shock economic activity sufficiently to explain magnitude of CAT bond spreads Shock of 2% of GDP (similar to Katrina) sufficient to explain the spreads
Reinsurance is highly efficient in dealing with the usual types of insurance market risks Losses relatively small compared to reinsurer capital Risks with relatively low covariability Risks with manageable variance and skewness Reinsurance facilitates long-term relationships between ceding insurers and reinsurers, reducing informational asymmetries and leading to more efficient risk sharing Reinsurance available to insurers of all sizes, whereas securitization most efficient for large firms
Conclusions II Securitization more efficient for relatively large risks with high covariability and skewness CAT bonds have established a market niche for CAT risk financing and post-shock recapitalization Securitization provides needed capacity to mitigate the effects of reinsurance price and availability cycles, periods when Reinsurance prices rise Supply of reinsurance is restricted Securitization reduces or eliminates credit risk
Conclusions III Risk-capital raised with insurance-linked securities has grown significantly Still small relative to reinsurance Recently, bonds issued for low layer coverages such as automobile insurance Spreads have been declining Now comparable with corporates, reinsurance, ILWs Prices remain volatile and subject to spikes following large loss events Off-peak bonds (Mexican, etc.) may stabilize market and reduce spreads
Conclusions IV Bonds have attracted broad market interest – dedicated CAT funds now account for majority of the market Because they are transparent and fully collateralized, CAT bonds less exposed to the problems that befell credit default swaps (CDS) and MBS CAT bonds generally much less complex than MBS & CDOs Except for a small number of bonds with Lehman as counterparty, CAT bonds did well during the crisis Therefore, CAT bonds provided valuable liquidity for trading banks during the crisis
Conclusions V Other securitized structures may provide additional capacity in the future Catastrophe futures & options Swaps Sidecars However, for futures & options to succeed, insurers need to develop trading expertise Continual hedging operations versus Buy reinsurance once a year