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The rise in comovement across national stock markets: market integration or IT bubble?

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  • Robin Brooks
  • Marco Del Negro

Abstract

A stylized fact in the portfolio diversification literature is that diversifying across countries is more effective than diversifying across industries in terms of risk reduction. But with the rise in comovement across national stock markets since the mid-1990s, this no longer appears to be true. We explore whether this change is driven by global integration and therefore likely to be permanent, or if it is a temporary phenomenon associated with the recent stock market bubble. Our results point to the latter hypothesis. In the aftermath of the bubble, diversifying across countries may therefore still be effective in reducing portfolio risk.

Suggested Citation

  • Robin Brooks & Marco Del Negro, 2002. "The rise in comovement across national stock markets: market integration or IT bubble?," FRB Atlanta Working Paper 2002-17, Federal Reserve Bank of Atlanta.
  • Handle: RePEc:fip:fedawp:2002-17
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    1. Brooks, Robin & Del Negro, Marco, 2004. "The rise in comovement across national stock markets: market integration or IT bubble?," Journal of Empirical Finance, Elsevier, vol. 11(5), pages 659-680, December.
    2. Bekaert, Geert & Harvey, Campbell R. & Lumsdaine, Robin L., 2002. "Dating the integration of world equity markets," Journal of Financial Economics, Elsevier, vol. 65(2), pages 203-247, August.
    3. Hali J. Edison & Michael W. Klein & Luca Antonio Ricci & Torsten Sl√łk, 2004. "Capital Account Liberalization and Economic Performance: Survey and Synthesis," IMF Staff Papers, Palgrave Macmillan, vol. 51(2), pages 1-2.
    4. Griffin, John M. & Andrew Karolyi, G., 1998. "Another look at the role of the industrial structure of markets for international diversification strategies," Journal of Financial Economics, Elsevier, vol. 50(3), pages 351-373, December.
    5. Heston, Steven L. & Rouwenhorst, K. Geert & Wessels, Roberto E., 1995. "The structure of international stock returns and the integration of capital markets," Journal of Empirical Finance, Elsevier, vol. 2(3), pages 173-197, September.
    6. Serra, Ana Paula, 2000. "Country and industry factors in returns: evidence from emerging markets' stocks," Emerging Markets Review, Elsevier, vol. 1(2), pages 127-151, September.
    7. Heston, Steven L. & Rouwenhorst, K. Geert, 1994. "Does industrial structure explain the benefits of international diversification?," Journal of Financial Economics, Elsevier, vol. 36(1), pages 3-27, August.
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    Keywords

    Financial markets ; Risk ; Markets;

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