Home bias in financial markets: robust satisficing with info gaps
AbstractThe observed patterns of equity portfolio allocation around the world are at odds with predictions from a capital asset pricing model (CAPM). What has come to be called the “home-bias” phenomenon is that investors tend to hold a disproportionately large share of their equity portfolio in home country stocks as compared with predictions of the CAPM. This paper provides an explanation of the home-bias phenomenon based on information-gap decision theory. The decision concept that is used here is that profit is satisficed and robustness to uncertainty is maximized rather than expected profit being maximized. Furthermore, uncertainty is modeled nonprobabilistically with info-gap models of uncertainty, which can be viewed as a possible quantification of Knightian uncertainty.
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Bibliographic InfoPaper provided by Federal Reserve Bank of Atlanta in its series Working Paper with number 2003-35.
Date of creation: 2003
Date of revision:
This paper has been announced in the following NEP Reports:
- NEP-ALL-2004-02-29 (All new papers)
- NEP-FIN-2004-02-29 (Finance)
- NEP-FMK-2004-02-29 (Financial Markets)
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