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The optimal extraction rate versus the expected real return of a sovereign wealth fund: Some simulations

Author

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  • Aase, Knut K.

    (Dept. of Business and Management Science, Norwegian School of Economics)

  • Bjerksund, Petter

    (Dept. of Business and Management Science, Norwegian School of Economics)

Abstract

With reference to funds established for the benefits of the public at large, a university endowment, or other similar sovereign wealth fund, we demonstrate that the optimal extraction rate from the fund is significantly smaller than the expected real rate of return on the underlying fund. We consider the situation where the influx to the fund has stopped, it is in a steady state, and is invested broadly in the international financial markets. The optimal spending rate secures that the fund is a perpetuity, i.e., it will last 'forever', where the real value of the fund after payments is stationary, while spending according to the expected rate of return will deplete the fund with probability 1. Optimal portfolio choice and spending are then inconsistent. Our conclusions are contrary to the recommendations of an expert panel to the Norwegian Government Pension Fund Global, as well as at odds with part of the extant literature on the management of endowments of universities.

Suggested Citation

  • Aase, Knut K. & Bjerksund, Petter, 2019. "The optimal extraction rate versus the expected real return of a sovereign wealth fund: Some simulations," Discussion Papers 2019/7, Norwegian School of Economics, Department of Business and Management Science, revised 03 Feb 2021.
    • Handle: RePEc:hhs:nhhfms:2019_007
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    File URL: http://hdl.handle.net/11250/2614271
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    References listed on IDEAS

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    1. Larry G. Epstein & Stanley E. Zin, 2013. "Substitution, risk aversion and the temporal behavior of consumption and asset returns: A theoretical framework," World Scientific Book Chapters, in: Leonard C MacLean & William T Ziemba (ed.), HANDBOOK OF THE FUNDAMENTALS OF FINANCIAL DECISION MAKING Part I, chapter 12, pages 207-239, World Scientific Publishing Co. Pte. Ltd..
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    4. Epstein, Larry G & Zin, Stanley E, 1991. "Substitution, Risk Aversion, and the Temporal Behavior of Consumption and Asset Returns: An Empirical Analysis," Journal of Political Economy, University of Chicago Press, vol. 99(2), pages 263-286, April.
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    6. Merton, Robert C, 1969. "Lifetime Portfolio Selection under Uncertainty: The Continuous-Time Case," The Review of Economics and Statistics, MIT Press, vol. 51(3), pages 247-257, August.
    7. Aase, Knut K., 2016. "Life Insurance And Pension Contracts Ii: The Life Cycle Model With Recursive Utility," ASTIN Bulletin, Cambridge University Press, vol. 46(1), pages 71-102, January.
    8. Duffie, Darrell & Epstein, Larry G, 1992. "Asset Pricing with Stochastic Differential Utility," The Review of Financial Studies, Society for Financial Studies, vol. 5(3), pages 411-436.
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    Cited by:

    1. Knut Anton Mork & Haakon Andreas Trønnes & Vegard Skonseng Bjerketvedt, "undated". "Capital preservation and current spending with Sovereign Wealth Funds and Endowment Funds: A simulation study," Working Paper Series 19222, Department of Economics, Norwegian University of Science and Technology.

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    More about this item

    Keywords

    Optimal extraction rate; endowment funds; expected utility; recursive utility;
    All these keywords.

    JEL classification:

    • D51 - Microeconomics - - General Equilibrium and Disequilibrium - - - Exchange and Production Economies
    • D53 - Microeconomics - - General Equilibrium and Disequilibrium - - - Financial Markets
    • D90 - Microeconomics - - Micro-Based Behavioral Economics - - - General
    • E21 - Macroeconomics and Monetary Economics - - Consumption, Saving, Production, Employment, and Investment - - - Consumption; Saving; Wealth
    • G10 - Financial Economics - - General Financial Markets - - - General (includes Measurement and Data)
    • G12 - Financial Economics - - General Financial Markets - - - Asset Pricing; Trading Volume; Bond Interest Rates

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