Property-Liability Insurance Loss Reserve Ranges Based on Economic Value Stephen P. D’Arcy, FCAS, PhD Alfred Y. H. Au, Actuarial Student Liang Zhang, Actuarial.

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Presentation transcript:

Property-Liability Insurance Loss Reserve Ranges Based on Economic Value Stephen P. D’Arcy, FCAS, PhD Alfred Y. H. Au, Actuarial Student Liang Zhang, Actuarial Student University of Illinois Casualty Loss Reserve Seminar September 2008 We wish to thank the Actuarial Foundation and the Casualty Actuarial Society for providing financial support for this research.

Overview Background –Loss reserve ranges –Economic value of loss reserves –Inflation Methodology Running the model Results Further research Conclusions

Background Traditional loss reserving methods –Nominal, undiscounted, for statutory requirements –Impacts of inflation on traditional methods

Background Recent Developments –ALM –FASB & IASC: “Fair Value” –CEA: Solvency II –S&P criticism

Trends in Inflation

Increasing oil prices Depreciation of the dollar Sub-prime mortgage, credit crunch Fed lowered discount rate

Trends in Inflation

Methodology Loss generation model Loss decay model (payment pattern) Inflation model –Ornstein-Uhlenbeck –Masterson Claim Cost Index Nominal interest rate model –2 factor Hull-White Fixed claim model –D’Arcy & Gorvett

Loss Generation Model Nominal values: –Normally generated losses compounded by the nominal interest rate Economic values: –Nominal losses discounted by the inflation rate

Fixed Claim Model

Discrete approximation of continuous function Impact of inflation on fixed claim model

Running the Model Input Sheet Loss Generator Nominal Interest Rate Inflation Inflation under Fixed Claim Fixed Claim Model Summary Masterson Claim Cost Index

Input Sheet

Loss Generator

Nominal Interest Rate

Inflation

Impact of Inflation on Claims

Fixed Claim Model

Summary

Masterson Claim Cost Index

Results Taylor Method vs. D’Arcy-Gorvett Approach

Results Higher Claim Cost Inflation

Results Higher Inflation/Interest Rate Correlation

Results Higher and More Volatile Inflation

Further Research Two factor approach to loss reserving –Deflate loss triangle –Generate reserve ranges on deflated losses –Incorporate inflation variability separately –Useful when inflation rate or variability changes –Available at: ALM issues –Some companies intentionally mismatch assets and liabilities to pick up yield –Mismatching would increase the risk of an increase in inflation

Summary Traditional loss reserving methods do not reflect the economic value of loss reserves Economic value ranges can be smaller than the nominal value ranges Results are more significant during periods of high inflation rates and increased inflation volatility