Portfolio Selection and Asset Pricing Models
Journal of Finance, forthcoming.
49 Pages Posted: 13 Feb 2009
Date Written: March 13, 1999
Finance theory can be used to form informative prior beliefs in financial decision-making. This paper approaches portfolio selection in a Bayesian framework that incorporates a prior degree of belief in an asset pricing model. Sample evidence on home bias and value and size effects is evaluated from an asset-allocation perspective. U.S. investors' belief in the domestic CAPM must be very strong to justify the home bias observed in their equity holdings. The same strong prior belief results in large and stable optimal positions in the Fama-French book-to-market portfolio in combination with the market since the 1940s.
Keywords: portfolio choice, Bayesian, asset pricing, CAPM
JEL Classification: G12
Suggested Citation: Suggested Citation