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Informational Externalities and Welfare-Reducing Speculation

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Author Info
Stein, Jeremy C

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Abstract

Introducing more speculators into the market for a given commodity leads to improved risk sharing but can also change the informational content of prices. This inflicts an externality on those traders already in the market, whose ability to make inferences based on current prices will be aff ected. In some cases, the externality is negative: the entry of new s peculators lowers the informativeness of the price to existing trader s. The net result can be one of price destabilization and welfare red uction. This is true even when all agents are rational, risk-averse c ompetitors who make the best possible use of their available informat ion. Copyright 1987 by University of Chicago Press.

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Publisher Info
Article provided by University of Chicago Press in its journal Journal of Political Economy.

Volume (Year): 95 (1987)
Issue (Month): 6 (December)
Pages: 1123-45
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Handle: RePEc:ucp:jpolec:v:95:y:1987:i:6:p:1123-45

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  1. C.L. Osler & John A. Carlson, 1996. "Rational speculators and exchange rate volatility," Staff Reports 13, Federal Reserve Bank of New York. [Downloadable!]
  2. Richard K. Lyons, 1991. "Private Beliefs and Information Externalities in the Foreign Exchange Market," NBER Working Papers 3889, National Bureau of Economic Research, Inc. [Downloadable!] (restricted)
    Other versions:
  3. J. Bradford De Long & Andrei Shleifer & Lawrence H. Summers & Robert J. Waldmann, 1989. "The Size and Incidence of the Losses from Noise Trading," NBER Working Papers 2875, National Bureau of Economic Research, Inc. [Downloadable!] (restricted)
    Other versions:
  4. Laurent Calvet & Martin Gonzalez-Eiras & Paolo Sodini, 2003. "Financial Innovation, Market Participation and Asset Prices," NBER Working Papers 9840, National Bureau of Economic Research, Inc. [Downloadable!] (restricted)
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  5. Maurice Peat & M. McCorry, 1997. "Individual Share Futures Contracts: The Economic Impact of Their Introduction on the Underlying Equity Market," Working Paper Series 74, School of Finance and Economics, University of Technology, Sydney. [Downloadable!]
  6. Sciubba, E., 1999. "Asymmetric Information and Survival in Financial Markets," Cambridge Working Papers in Economics 9908, Faculty of Economics, University of Cambridge. [Downloadable!]
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  7. Paul Kupiec, 1998. "Margin Requirements, Volatility, and Market Integrity: What Have We Learned Since the Crash?," Journal of Financial Services Research, Springer, vol. 13(3), pages 231-255, June. [Downloadable!] (restricted)
  8. Kenneth A. Froot & David S. Scharfstein & Jeremy C. Stein, 1990. "Herd on the Street: Informational Inefficiencies in a Market with Short-Term Speculation," NBER Working Papers 3250, National Bureau of Economic Research, Inc. [Downloadable!] (restricted)
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  9. A. Chatrath & F. Song & B. Adrangi, 2003. "Futures trading activity and stock price volatility: some extensions," Applied Financial Economics, Taylor and Francis Journals, vol. 13(9), pages 655-664, September. [Downloadable!] (restricted)
  10. Juan A. Lafuente & Manuel Illueca Muñoz, 2003. "The Effect Of Futures Trading Activity On The Distribution Of Spot Market Returns," Working Papers. Serie EC 2003-23, Instituto Valenciano de Investigaciones Económicas, S.A. (Ivie). [Downloadable!]
  11. Gregory Duffee & Chunseng Zhou, 1999. "Credit Derivatives in Banking: Useful Tools for Managing Risk?," Research Program in Finance, Working Paper Series 1006, Research Program in Finance, Institute for Business and Economic Research, UC Berkeley. [Downloadable!]
  12. Gregory R. Duffee and Chunsheng Zhou., 1999. "Credit Derivatives in Banking: Useful Tools for Managing Risk?," Research Program in Finance Working Papers RPF-289, University of California at Berkeley. [Downloadable!]
  13. Gregory R. Duffee & Chunsheng Zhou, 1997. "Credit derivatives in banking: useful tools for managing risk?," Finance and Economics Discussion Series 1997-13, Board of Governors of the Federal Reserve System (U.S.). [Downloadable!]
  14. Stéphane Gregoir & Bernard Salanie, 1991. "Spéculation, prix et bien être," Annales d'Economie et de Statistique, ADRES, issue 24, pages 09, Octobre-D. [Downloadable!]
  15. 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. [Downloadable!] (restricted)
    Other versions:
  16. Michele Fratianni, 2000. "Comment on Aliber's “Capital Flows, Exchange Rates, and the New International Financial Architecture: Six Financial Crises in Search of a Generic Explanationâ€," Open Economies Review, Springer, vol. 11(1), pages 63-67, August. [Downloadable!] (restricted)
  17. Harrison Hong & Jeremy C. Stein, 1997. "A Unified Theory of Underreaction, Momentum Trading and Overreaction in Asset Markets," NBER Working Papers 6324, National Bureau of Economic Research, Inc. [Downloadable!] (restricted)
  18. J. Bradford De Long & Andrei Shleifer & Lawrence H. Summers & Robert J. Waldmann, . "Noise Trader Risk in Financial Markets," J. Bradford De Long's Working Papers _124, University of California at Berkeley, Economics Department. [Downloadable!]
    Other versions:
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