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Portfolio Diversification, Proximity Investment and City Agglomeration

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  • WILLIAM N. GOETZMANN

    ()
    (Yale School of Management - International Center for Finance)

  • MASSIMO MASSA

    ()
    (INSEAD - Department of Finance)

  • ANDREI SIMONOV

    ()
    (Stockholm School of Economics - Department of Finance)

Abstract

We study the puzzle of portfolio underdiversification and proximity investment from a novel perspective, linking it to the process of urbanization. We find that urban portfolios are more focused - i.e., less diversified and more concentrated in 'close' stocks. We explain it in terms of the process of 'professional specialization' that characterizes urban environments. We test this against a number of alternative theories: financial sophistication, social competition and hedging non-financial risk. We show that the very same factors behind the drive to city agglomeration also affect both the degree of portfolio diversification and proximity investing by influencing investor information and risk.

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Bibliographic Info

Paper provided by Yale School of Management in its series Yale School of Management Working Papers with number ysm452.

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Date of creation: 14 Apr 2005
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Handle: RePEc:ysm:somwrk:ysm452

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Web page: http://icf.som.yale.edu/
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Cited by:
  1. Margarida Abreu & Victor Mendes & João A. Santos, 2010. "Home Country Bias: Does Domestic Experience Help Investors Enter Foreign Markets?," Working Papers Department of Economics 2010/02, ISEG - School of Economics and Management, Department of Economics, University of Lisbon.
  2. repec:wyi:wpaper:002041 is not listed on IDEAS
  3. Bodnaruk, Andriy & Ostberg, Per, 2009. "Does investor recognition predict returns?," Journal of Financial Economics, Elsevier, vol. 91(2), pages 208-226, February.
  4. Fu, Shihe & Shan, Liwei, 2011. "Agglomeration Economies and Local Comovement of Stock Returns," MPRA Paper 31887, University Library of Munich, Germany.
  5. Morse, Adair & Shive, Sophie, 2011. "Patriotism in your portfolio," Journal of Financial Markets, Elsevier, vol. 14(2), pages 411-440, May.
  6. Charlotte Christiansen & Juanna Shröter Joensen & Jesper Rangvid, 2005. "Do More Economists Hold Stocks?," Economics Working Papers 2005-06, School of Economics and Management, University of Aarhus.
  7. Daniel Hoechle & Heinz Zimmermann, 2007. "A Generalization of the Calendar Time Portfolio Approach and the Performance of Private Investors," Working papers 2007/14, Faculty of Business and Economics - University of Basel.
  8. Leung, Charles Ka Yui & Teo, Wing Leong, 2011. "Should the optimal portfolio be region-specific? A multi-region model with monetary policy and asset price co-movements," Regional Science and Urban Economics, Elsevier, vol. 41(3), pages 293-304, May.

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