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A comparison of stock market mechanisms

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  • Giovanni Cespa

Abstract

This paper studies the relationship between the amount of public information that stock market prices incorporate and the equilibrium behavior of market participants. The analysis is framed in a static, NREE setup where traders exchange vectors of assets accessing multidimensional information under two alternative market structures. In the first (the unrestricted system), both informed and uninformed speculators can condition their demands for each traded asset on all equilibrium prices; in the second (the restricted system), they are restricted to condition their demand on the price of the asset they want to trade. I show that informed traders’ incentives to exploit multidimensional private information depend on the number of prices they can condition upon when submitting their demand schedules, and on the specific price formation process one considers. Building on this insight, I then give conditions under which the restricted system is more efficient than the unrestricted system.

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Bibliographic Info

Paper provided by Department of Economics and Business, Universitat Pompeu Fabra in its series Economics Working Papers with number 545.

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Date of creation: May 2001
Date of revision: Nov 2003
Handle: RePEc:upf:upfgen:545

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Web page: http://www.econ.upf.edu/

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Keywords: Financial economics; asset pricing; information and market efficiency;

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  1. Caballe, J. & Krishnan, M., 1989. "Insider Trading and asset Pricing in an Imperfectly Competitive Multi- Secrity Market," UFAE and IAE Working Papers 132.90, Unitat de Fonaments de l'Anàlisi Econòmica (UAB) and Institut d'Anàlisi Econòmica (CSIC).
  2. Biais, Bruno, 1993. " Price Information and Equilibrium Liquidity in Fragmented and Centralized Markets," Journal of Finance, American Finance Association, vol. 48(1), pages 157-85, March.
  3. Xavier Vives, 1994. "Short-term Investment and the Informational Efficiency of the Market," CEPR Financial Markets Paper 0034, European Science Foundation Network in Financial Markets, c/o C.E.P.R, 77 Bastwick Street, London EC1V 3PZ.
  4. Madhavan, Ananth, 1992. " Trading Mechanisms in Securities Markets," Journal of Finance, American Finance Association, vol. 47(2), pages 607-41, June.
  5. Wohl, Avi & Kandel, Shmuel, 1997. "Implications of an Index-Contingent Trading Mechanism," The Journal of Business, University of Chicago Press, vol. 70(4), pages 471-88, October.
  6. Nicholas Economides & Robert Schwartz,, . "Electronic Call Market Trading," Financial Networks _001, Economics of Networks.
  7. Kyle, Albert S, 1985. "Continuous Auctions and Insider Trading," Econometrica, Econometric Society, vol. 53(6), pages 1315-35, November.
  8. Subrahmanyam, Avanidhar, 1991. "A Theory of Trading in Stock Index Futures," Review of Financial Studies, Society for Financial Studies, vol. 4(1), pages 17-51.
  9. Pagano, Marco & Roell, Ailsa, 1996. " Transparency and Liquidity: A Comparison of Auction and Dealer Markets with Informed Trading," Journal of Finance, American Finance Association, vol. 51(2), pages 579-611, June.
  10. Admati, Anat R, 1985. "A Noisy Rational Expectations Equilibrium for Multi-asset Securities Markets," Econometrica, Econometric Society, vol. 53(3), pages 629-57, May.
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Cited by:
  1. Cespa, Giovanni & Foucault, Thierry, 2011. "Learning from Prices, Liquidity Spillovers, and Market Segmentation," CEPR Discussion Papers 8350, C.E.P.R. Discussion Papers.
  2. Giovanni Cespa, 2008. "Information Sales and Insider Trading with Long-Lived Information," Journal of Finance, American Finance Association, vol. 63(2), pages 639-672, 04.
  3. Giovanni Cespa, 2007. "Information Sales and Insider Trading with Long-lived Information," Working Papers 613, Queen Mary, University of London, School of Economics and Finance.
  4. Giovanni Cespa, 2003. "Giffen Goods and Market Making," Working Papers 68, Barcelona Graduate School of Economics.

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