The International Diversification Puzzle is Worse than you Think
Although international financial markets are highly integrated across the more well-developed countries, investors nevertheless hold portfolios that consist nearly exclusively of domestic assets. This violation of the predictions of standard theories of portfolio choice is known as the 'international diversification puzzle.' In this paper, we show that the presence of nontraded risk associated with variations in the return to human capital has dramatic implications for the optimal fraction of domestic assets in an individual's portfolio. Our analysis suggests that the returns to human capital are highly correlated with the returns to domestic financial assets. Hedging the risk associated with nontraded human capital involves a short position in national equities in an amount approximately 1.5 times the value of the national stock market. Thus optimal and value- weighted portfolios very likely involve a short position in domestic marketable assets.
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- Jermann, Urban J., 1998. "Asset pricing in production economies," Journal of Monetary Economics, Elsevier, vol. 41(2), pages 257-275, April.
- Mankiw, N.G. & Zeldes, S.P., 1990.
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Weiss Center Working Papers
23-90, Wharton School - Weiss Center for International Financial Research.
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- N. Gregory Mankiw & Stephen P. Zeldes, 1990. "The Consumption of Stockholders and Non-Stockholders," NBER Working Papers 3402, National Bureau of Economic Research, Inc.
- French, Kenneth R. & Poterba, James M., 1990. "Japanese and U.S. cross-border common stock investments," Journal of the Japanese and International Economies, Elsevier, vol. 4(4), pages 476-493, December.
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