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Comparing Asset Pricing Models: An Investment Perspective

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Lubos Pastor
Robert F. Stambaugh

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Abstract

We investigate the portfolio choices of mean-variance-optimizing investors who use sample evidence to update prior beliefs centered on either risk-based or characteristic-based pricing models. With dogmatic beliefs in such models and an unconstrained ratio of position size to capital, optimal portfolios can differ across models to economically significant degrees. The differences are substantially reduced by modest uncertainty about the models' pricing abilities. When the ratio of position size to capital is subject to realistic constraints, the differences in portfolios across models become even less important, nonexistent in some cases.

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Paper provided by National Bureau of Economic Research, Inc in its series NBER Working Papers with number 7284.

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Date of creation: Aug 1999
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Handle: RePEc:nbr:nberwo:7284

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Find related papers by JEL classification:
G11 - Financial Economics - - General Financial Markets - - - Portfolio Choice; Investment Decisions
G12 - Financial Economics - - General Financial Markets - - - Asset Pricing

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  1. Merton, Robert C, 1973. "An Intertemporal Capital Asset Pricing Model," Econometrica, Econometric Society, vol. 41(5), pages 867-87, September. [Downloadable!] (restricted)
  2. Grinblatt, Mark & Titman, Sheridan, 1987. "The Relation between Mean-Variance Efficiency and Arbitrage Pricing," Journal of Business, University of Chicago Press, vol. 60(1), pages 97-112, January. [Downloadable!] (restricted)
  3. Ingersoll, Jonathan E, Jr, 1984. " Some Results in the Theory of Arbitrage Pricing," Journal of Finance, American Finance Association, vol. 39(4), pages 1021-39, September. [Downloadable!] (restricted)
  4. Shanken, Jay, 1987. "A Bayesian approach to testing portfolio efficiency," Journal of Financial Economics, Elsevier, vol. 19(2), pages 195-215, December. [Downloadable!] (restricted)
  5. Ross, Stephen A., 1976. "The arbitrage theory of capital asset pricing," Journal of Economic Theory, Elsevier, vol. 13(3), pages 341-360, December. [Downloadable!] (restricted)
  6. Klein, Roger W. & Bawa, Vijay S., 1976. "The effect of estimation risk on optimal portfolio choice," Journal of Financial Economics, Elsevier, vol. 3(3), pages 215-231, June. [Downloadable!] (restricted)
  7. Huberman, Gur & Kandel, Shmuel & Stambaugh, Robert F, 1987. " Mimicking Portfolios and Exact Arbitrage Pricing," Journal of Finance, American Finance Association, vol. 42(1), pages 1-9, March. [Downloadable!] (restricted)
  8. Daniel, Kent & Titman, Sheridan, 1997. " Evidence on the Characteristics of Cross Sectional Variation in Stock Returns," Journal of Finance, American Finance Association, vol. 52(1), pages 1-33, March. [Downloadable!] (restricted)
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  9. Fama, Eugene F. & French, Kenneth R., 1993. "Common risk factors in the returns on stocks and bonds," Journal of Financial Economics, Elsevier, vol. 33(1), pages 3-56, February. [Downloadable!] (restricted)
  10. Kandel, Shmuel & McCulloch, Robert & Stambaugh, Robert F, 1995. "Bayesian Inference and Portfolio Efficiency," Review of Financial Studies, Oxford University Press for Society for Financial Studies, vol. 8(1), pages 1-53. [Downloadable!] (restricted)
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  11. Wang, Zhenyu, 1998. "Efficiency loss and constraints on portfolio holdings1," Journal of Financial Economics, Elsevier, vol. 48(3), pages 359-375, June. [Downloadable!] (restricted)
  12. A. Craig MacKinlay & Lubos Pastor, 1999. "Asset Pricing Models: Implications for Expected Returns and Portfolio Selection," NBER Working Papers 7162, National Bureau of Economic Research, Inc. [Downloadable!] (restricted)
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  13. Kandel, Shmuel & Stambaugh, Robert F, 1996. " On the Predictability of Stock Returns: An Asset-Allocation Perspective," Journal of Finance, American Finance Association, vol. 51(2), pages 385-424, June. [Downloadable!] (restricted)
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