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Dynamic Games and Applications

, Volume 1, Issue 2, pp 220–252 | Cite as

Influence of Big Traders on the Stock Market: Theory and Simulation

  • Gopal K. BasakEmail author
  • Mrinal K. Ghosh
  • Diganta Mukherjee
Article
  • 160 Downloads

Abstract

We study the influence of large traders in the stock market in the presence of a fringe of marginal “noise traders”. We formulate a trade model relating stock price to the demand strategies of these traders who wish to maximize their payoffs. Using the Nash equilibrium concept, we compute the optimal value functions for the large traders and study the stability of the state process (log price) under equilibrium strategies of the large traders. In the process, we propose two measures. The first one is to measure the big traders’ total faith on the market’s valuation (φ 0), and the second one is to measure the big traders’ interaction between themselves (φ 1). We discuss what values of the measures might indicate a collusion of the big traders to corner the market for their benefit and illustrate this with numerical examples. We also illustrate, with diagrams, the historical and instantaneous correlation among the value processes for these large traders to highlight certain interesting features that influence the market.

Keywords

Financial market Stochastic differential game Nash equilibrium Stability of stock market 

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Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  • Gopal K. Basak
    • 1
    Email author
  • Mrinal K. Ghosh
    • 2
  • Diganta Mukherjee
    • 3
  1. 1.Stat-Math UnitIndian Statistical InstituteKolkataIndia
  2. 2.Department of MathematicsIndian Institute of ScienceBangaloreIndia
  3. 3.Unitedworld School of BusinessKolkataIndia

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