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Does one Soros make a difference?: a theory of currency crises with large and small traders

  • Giancarlo Corsetti
  • Amil Dasgupta
  • Stephen Morris
  • Hyun Song Shin

Do large investors increase the vulnerability of a country to speculative attacks in the foreign exchange markets? To address this issue, we build a model of currency crises where a single large investor and a continuum of small investors independently decide whether to attack a currency based on their private information about fundamentals. Even abstracting from signaling, the presence of the large investor does make all other traders more aggressive in their selling. Relative to the case in which there is no large investors, small investors attach the currency when fundamentals are stronger. Yet, the difference can be small, or null, depending on the relative precision of private information of the small and large investors. Adding signaling makes the influence of the large trader on small traders behaviour much stronger.

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File URL: http://eprints.lse.ac.uk/25045/
File Function: Open access version.
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Paper provided by London School of Economics and Political Science, LSE Library in its series LSE Research Online Documents on Economics with number 25045.

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Length: 32 pages
Date of creation: Mar 2001
Date of revision:
Handle: RePEc:ehl:lserod:25045
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Web page: http://www.lse.ac.uk/

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  1. Stephen Morris & Hyun S Shin, 2001. "Global Games: Theory and Applications," Levine's Working Paper Archive 122247000000001080, David K. Levine.
  2. Frankel, David M. & Morris, Stephen & Pauzner, Ady, 2003. "Equilibrium selection in global games with strategic complementarities," Journal of Economic Theory, Elsevier, vol. 108(1), pages 1-44, January.
  3. Carlsson, H. & van Damme, E.E.C., 1990. "Global games and equilibrium selection," Discussion Paper 1990-52, Tilburg University, Center for Economic Research.
  4. Maurice Obstfeld, 1995. "Models of Currency Crises with Self-Fulfilling Features," NBER Working Papers 5285, National Bureau of Economic Research, Inc.
  5. Diamond, Douglas W & Dybvig, Philip H, 1983. "Bank Runs, Deposit Insurance, and Liquidity," Journal of Political Economy, University of Chicago Press, vol. 91(3), pages 401-19, June.
  6. Morris, Stephen & Shin, Hyun Song, 1998. "Unique Equilibrium in a Model of Self-Fulfilling Currency Attacks," American Economic Review, American Economic Association, vol. 88(3), pages 587-97, June.
  7. Levine, David K & Pesendorfer, Wolfgang, 1995. "When Are Agents Negligible?," American Economic Review, American Economic Association, vol. 85(5), pages 1160-70, December.
  8. Giancarlo Corsetti & Paolo Pesenti & Nouriel Roubini, 1998. "What Caused the Asian Currency and Financial Crisis? Part I: A Macroeconomic Overview," NBER Working Papers 6833, National Bureau of Economic Research, Inc.
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