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Strategic behavior and price discovery

  • Luis A. Medrano
  • Xavier Vives

The paper analyzes the effects of strategic behavior by an insider in a price discovery process, akin to an information tatonnement, in the presence of a competitive informed sector. Such processes are used in the preopening period of continuous trading systems in several exchanges. It is found that the insider manipulates the market using a contrarian strategy in order to neutralize the effect of the trades of competitive informed agents. Furthermore, consistently with the empirical evidence available, we find that information revelation accelerates close to the opening, that the market price does not converge to the fundamental value no matter how many rounds the tatonnement has, and that the expected trading volume displays a U-shaped pattern. We also find that a market with a larger competitive sector (smaller insider) has an improved informational efficiency and an increased trading volume. The insider provides a public good (a lower informativeness of the price) for the competitive informed sector.

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Paper provided by Department of Economics and Business, Universitat Pompeu Fabra in its series Economics Working Papers with number 238.

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Date of creation: Sep 1997
Date of revision:
Handle: RePEc:upf:upfgen:238
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  1. Benabou, R. & Laroque, G., 1989. "Using Privileged Information To Manipulate Markets: Insiders, Gurus, And Credibility," Working papers 513, Massachusetts Institute of Technology (MIT), Department of Economics.
  2. Back, Kerry, 1992. "Insider Trading in Continuous Time," Review of Financial Studies, Society for Financial Studies, vol. 5(3), pages 387-409.
  3. Colin Camerer, 1998. "Can asset markets be manipulated? A field experiment with racetrack betting," Natural Field Experiments 00222, The Field Experiments Website.
  4. Gould, John P & Verrecchia, Robert E, 1985. "The Information Content of Specialist Pricing," Journal of Political Economy, University of Chicago Press, vol. 93(1), pages 66-83, February.
  5. Rochet, Jean-Charles & Vila, Jean-Luc, 1994. "Insider Trading without Normality," Review of Economic Studies, Wiley Blackwell, vol. 61(1), pages 131-52, January.
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  7. Keim, Donald B. & Madhavan, Ananth, 1995. "Anatomy of the trading process Empirical evidence on the behavior of institutional traders," Journal of Financial Economics, Elsevier, vol. 37(3), pages 371-398, March.
  8. Foster, F. Douglas & Viswanathan, S., 1994. "Strategic Trading with Asymmetrically Informed Traders and Long-Lived Information," Journal of Financial and Quantitative Analysis, Cambridge University Press, vol. 29(04), pages 499-518, December.
  9. Hart, Oliver D, 1977. "On the Profitability of Speculation," The Quarterly Journal of Economics, MIT Press, vol. 91(4), pages 579-97, November.
  10. Madhavan, Ananth & Panchapagesan, Venkatesh, 2000. "Price Discovery in Auction Markets: A Look Inside the Black Box," Review of Financial Studies, Society for Financial Studies, vol. 13(3), pages 627-58.
  11. Ching-to Albert Ma & Michael Manove, 1991. "Bargaining with Deadlines and Imperfect Player Control," Papers 0007, Boston University - Industry Studies Programme.
  12. Charles Cao & Eric Ghysels & Frank Hatheway, 1998. "Why Is the Bid Price Greater than the Ask? Price Discovery during the Nasdaq Pre-Opening," CIRANO Working Papers 98s-14, CIRANO.
  13. Fishman, Michael J & Hagerty, Kathleen M, 1995. "The Mandatory Disclosure of Trades and Market Liquidity," Review of Financial Studies, Society for Financial Studies, vol. 8(3), pages 637-76.
  14. Jordan, J. S., 1982. "A dynamic model of expectations equilibrium," Journal of Economic Theory, Elsevier, vol. 28(2), pages 235-254, December.
  15. Holden, Craig W. & Subrahmanyam, Avanidhar, 1994. "Risk aversion, imperfect competition, and long-lived information," Economics Letters, Elsevier, vol. 44(1-2), pages 181-190.
  16. Jarrow, Robert A., 1992. "Market Manipulation, Bubbles, Corners, and Short Squeezes," Journal of Financial and Quantitative Analysis, Cambridge University Press, vol. 27(03), pages 311-336, September.
  17. Colin F. Camerer, 1998. "Can Asset Markets Be Manipulated? A Field Experiment with Racetrack Betting," Journal of Political Economy, University of Chicago Press, vol. 106(3), pages 457-482, June.
  18. Kumar, Praveen & Seppi, Duane J, 1992. " Futures Manipulation with "Cash Settlement."," Journal of Finance, American Finance Association, vol. 47(4), pages 1485-502, September.
  19. Jordan, J. S., 1985. "Learning rational expectations: The finite state case," Journal of Economic Theory, Elsevier, vol. 36(2), pages 257-276, August.
  20. Laffont, Jean-Jacques & Maskin, Eric S, 1990. "The Efficient Market Hypothesis and Insider Trading on the Stock Market," Journal of Political Economy, University of Chicago Press, vol. 98(1), pages 70-93, February.
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