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Portfolio Diversification, Proximity Investment and City Agglomeration

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  • Goetzmann, William
  • Massa, Massimo
  • Simonov, Andrei

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 C.E.P.R. Discussion Papers in its series CEPR Discussion Papers with number 4786.

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Date of creation: Dec 2004
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Handle: RePEc:cpr:ceprdp:4786

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Keywords: city agglomeration; portfolio choice; professional specialization; proximity investment; under-diversification;

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Cited by:
  1. repec:wyi:wpaper:002041 is not listed on IDEAS
  2. 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.
  3. Christiansen, Charlotte & Joensen, Juanna Schröter & Rangvid, Jesper, 2005. "Do More Economists Hold Stocks?," Finance Research Group Working Papers F-2005-02, University of Aarhus, Aarhus School of Business, Department of Business Studies.
  4. Fu, Shihe & Shan, Liwei, 2011. "Agglomeration Economies and Local Comovement of Stock Returns," MPRA Paper 31887, University Library of Munich, Germany.
  5. Bodnaruk, Andriy & Ostberg, Per, 2009. "Does investor recognition predict returns?," Journal of Financial Economics, Elsevier, vol. 91(2), pages 208-226, February.
  6. 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.
  7. 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.
  8. Morse, Adair & Shive, Sophie, 2011. "Patriotism in your portfolio," Journal of Financial Markets, Elsevier, vol. 14(2), pages 411-440, May.

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