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Private Beliefs and Information Externalities in the Foreign Exchange Market

  • Lyons, R.K.

An information externality exists in the foreign exchange market due to the fact that traders play two partially conflicting roles: (i) each is a speculator and (ii) each is an information clearinghouse in that each intermediates own-customer orders which convey information. Profit maximization induces traders to underweight fundamental information in making their trades, reducing the degree to which prices reveal information at any given time. In the model, agents update diverse beliefs over time, with transactions-mediated tatonnement. The explicit role for transactions provides a framework for interpreting the relationship between the diversity of beliefs, trading volume, and price adjustment.

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Paper provided by Columbia - Graduate School of Business in its series Papers with number 91-17.

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Length: 114 pages
Date of creation: 1991
Date of revision:
Handle: RePEc:fth:colubu:91-17
Contact details of provider: Postal: U.S.A.; COLUMBIA UNIVERSITY, GRADUATE SCHOOL OF BUSINESS, PAINE WEBBER , New York, NY 10027 U.S.A
Phone: (212) 854-5553
Web page: http://www.gsb.columbia.edu/

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  1. Diamond, Douglas W. & Verrecchia, Robert E., 1981. "Information aggregation in a noisy rational expectations economy," Journal of Financial Economics, Elsevier, vol. 9(3), pages 221-235, September.
  2. Hellwig, Martin F., 1980. "On the aggregation of information in competitive markets," Journal of Economic Theory, Elsevier, vol. 22(3), pages 477-498, June.
  3. Jaffe, Jeffrey F & Winkler, Robert L, 1976. "Optimal Speculation against an Efficient Market," Journal of Finance, American Finance Association, vol. 31(1), pages 49-61, March.
  4. Jeffrey A. Frankel & Kenneth Froot, 1990. "Exchange Rate Forecasting Techniques, Survey Data, and Implications for the Foreign Exchange Market," NBER Working Papers 3470, National Bureau of Economic Research, Inc.
  5. Paul Milgrom & Nancy L.Stokey, 1979. "Information, Trade, and Common Knowledge," Discussion Papers 377R, Northwestern University, Center for Mathematical Studies in Economics and Management Science.
  6. Goodhart, Charles, 1988. "The Foreign Exchange Market: A Random Walk with a Dragging Anchor," Economica, London School of Economics and Political Science, vol. 55(220), pages 437-60, November.
  7. Glosten, Lawrence R. & Milgrom, Paul R., 1985. "Bid, ask and transaction prices in a specialist market with heterogeneously informed traders," Journal of Financial Economics, Elsevier, vol. 14(1), pages 71-100, March.
  8. Hirshleifer, Jack, 1971. "The Private and Social Value of Information and the Reward to Inventive Activity," American Economic Review, American Economic Association, vol. 61(4), pages 561-74, September.
  9. Grammatikos, Theoharry & Saunders, Anthony, 1986. "Futures Price Variability: A Test of Maturity and Volume Effects," The Journal of Business, University of Chicago Press, vol. 59(2), pages 319-30, April.
  10. Stein, Jeremy C., 1987. "Informational Externalities and Welfare-Reducing Speculation," Scholarly Articles 3660740, Harvard University Department of Economics.
  11. Tirole, Jean, 1982. "On the Possibility of Speculation under Rational Expectations," Econometrica, Econometric Society, vol. 50(5), pages 1163-81, September.
  12. Rubinstein, Mark, 1975. "Securities Market Efficiency in an Arrow-Debreu Economy," American Economic Review, American Economic Association, vol. 65(5), pages 812-24, December.
  13. Hal R. Varian, 1986. "Differences of opinion in financial markets," Proceedings, Federal Reserve Bank of St. Louis, pages 3-40.
  14. Karpoff, Jonathan M, 1986. " A Theory of Trading Volume," Journal of Finance, American Finance Association, vol. 41(5), pages 1069-87, December.
  15. Kyle, Albert S, 1985. "Continuous Auctions and Insider Trading," Econometrica, Econometric Society, vol. 53(6), pages 1315-35, November.
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