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Do Institutional Investors Destabilize Stock Prices? Evidence on Herding and Feedback Trading

  • Josef Lakonishok
  • Andrei Shleifer
  • Robert W. Vishny

This paper uses a new data set of quarterly portfolio holdings of 769 all-equity pension funds between 1985 and 1989 to evaluate the potential effect of their trading on stock prices. We address two aspects of trading by money managers: herding, which refers to buying (selling) the same stocks as other managers buy (sell) at the same time; and positive-feedback trading, which refers to buying winners and selling losers. These two aspects of trading are commonly a part of the argument that institutions destabilize stock prices. At the level of individual stocks at quarterly frequencies, we find no evidence of substantial herding or positive-feedback trading by pension fund managers, except in small stocks. Also, there is no strong cross-sectional correlation between changes in pension funds' holdings of a stock and its abnormal return.

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File URL: http://www.nber.org/papers/w3846.pdf
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Paper provided by National Bureau of Economic Research, Inc in its series NBER Working Papers with number 3846.

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Date of creation: Sep 1991
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Publication status: published as "The Impact of Institutional Investors on Stock Prices", Journal of Financial Economics, August 1992, vol 32, no. 1, pp 23-43
Handle: RePEc:nbr:nberwo:3846
Note: ME
Contact details of provider: Postal: National Bureau of Economic Research, 1050 Massachusetts Avenue Cambridge, MA 02138, U.S.A.
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  1. Scharfstein, David. & Stein, Jeremy C., 1988. "Herd behavior and investment," Working papers WP 2062-88., Massachusetts Institute of Technology (MIT), Sloan School of Management.
  2. J. Bradford De Long & Andrei Shleifer & Lawrence H. Summers & Robert J. Waldmann, 1989. "Positive Feedback Investment Strategies and Destabilizing Rational Speculation," NBER Working Papers 2880, National Bureau of Economic Research, Inc.
  3. De Bondt, Werner F M & Thaler, Richard, 1985. " Does the Stock Market Overreact?," Journal of Finance, American Finance Association, vol. 40(3), pages 793-805, July.
  4. Kraus, Alan & Stoll, Hans R., 1972. "Parallel Trading by Institutional Investors," Journal of Financial and Quantitative Analysis, Cambridge University Press, vol. 7(05), pages 2107-2138, December.
  5. David M. Cutler & James M. Poterba & Lawrence H. Summers, 1990. "Speculative Dynamics and the Role of Feedback Traders," NBER Working Papers 3243, National Bureau of Economic Research, Inc.
  6. Shiller, 021Robert J. & Pound, John, 1989. "Survey evidence on diffusion of interest and information among investors," Journal of Economic Behavior & Organization, Elsevier, vol. 12(1), pages 47-66, August.
  7. Lakonishok, Josef, et al, 1991. "Window Dressing by Pension Fund Managers," American Economic Review, American Economic Association, vol. 81(2), pages 227-31, May.
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