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Positive Feedback Investment Strategies and Destabilizing Rational Speculation

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  • De Long, J. Bradford
  • Shleifer, Andrei
  • Summers, Lawrence H.
  • Waldmann, Robert J.

Abstract

Analyses of the role of rational speculators in financial markets usually presume that such investors dampen price fluctuations by trading against liquidity or noise traders. This conclusion does not necessarily hold when noise traders follow positive-feedback investment strategies buy when prices rise and sell when prices fall. In such cases, it may pay rational speculators to try to jump on the bandwagon early and to purchase ahead of noise trader demand. If rational speculators' attempts to jump on the bandwagon early trigger positive-feedback investment strategies, then an increase in the number of forward-looking rational speculators can lead to increased volatility of prices about fundamentals.

Suggested Citation

  • De Long, J. Bradford & Shleifer, Andrei & Summers, Lawrence H. & Waldmann, Robert J., 1990. "Positive Feedback Investment Strategies and Destabilizing Rational Speculation," Scholarly Articles 27693805, Harvard University Department of Economics.
  • Handle: RePEc:hrv:faseco:27693805
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    References listed on IDEAS

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