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Multinationals and the Gains from International Diversification

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  • Patrick F. Rowland
  • Linda L. Tesar

Abstract

One possible explanation for home bias is that investors may obtain indirect international diversification benefits by investing in multinational firms rather than by investing directly in foreign markets. This paper employs mean-variance spanning tests to examine the diversification potential of multinational firms and foreign market indices for investors domiciled in Canada, France, Germany, Italy, Japan, the United Kingdom and the United States. We find that in most countries and most time periods, the portfolio of domestic stocks spans the risk and return opportunities of a portfolio that includes domestic and multinational stocks. However, there is weak evidence that U.S. multinationals provided global diversification benefits in the full 1984-92 sample and in the post-1987 subsample. We also find that the addition of foreign market indices to a domestic portfolio - inclusive of multinationals - provides diversification benefits. The economic importance of the shift of the portfolio frontier - measured as the utility gain from diversification - varies considerably from market to market and often reflects the benefits of large short positions in certain markets.

Suggested Citation

  • Patrick F. Rowland & Linda L. Tesar, 1998. "Multinationals and the Gains from International Diversification," NBER Working Papers 6733, National Bureau of Economic Research, Inc.
  • Handle: RePEc:nbr:nberwo:6733
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    More about this item

    JEL classification:

    • F23 - International Economics - - International Factor Movements and International Business - - - Multinational Firms; International Business
    • G11 - Financial Economics - - General Financial Markets - - - Portfolio Choice; Investment Decisions

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