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Thy Neighbor's Portfolio: Word-of-Mouth Effects in the Holdings and Trades of Money Managers

Author

Listed:
  • Harrison Hong
  • Jeffrey D. Kubik
  • Jeremy C. Stein

Abstract

A mutual-fund manager is more likely to hold (or buy, or sell) a particular stock in any quarter if other managers in the same city are holding (or buying, or selling) that same stock. This pattern shows up even when controlling for the distance between the fund manager and the stock in question, so it is distinct from a local-preference effect. It is also robust to a variety of controls for investment styles. These results can be interpreted in terms of an epidemic model in which investors spread information about stocks to one another by word of mouth.

Suggested Citation

  • Harrison Hong & Jeffrey D. Kubik & Jeremy C. Stein, 2003. "Thy Neighbor's Portfolio: Word-of-Mouth Effects in the Holdings and Trades of Money Managers," Harvard Institute of Economic Research Working Papers 2006, Harvard - Institute of Economic Research.
    • Handle: RePEc:fth:harver:2006
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    File URL: http://www.economics.harvard.edu/pub/hier/2003/HIER2006.pdf
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    More about this item

    JEL classification:

    • D83 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Search; Learning; Information and Knowledge; Communication; Belief; Unawareness
    • G11 - Financial Economics - - General Financial Markets - - - Portfolio Choice; Investment Decisions

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