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Phase Transition in the S&P Stock Market

  • Matthias Raddant
  • Friedrich Wagner

We analyze the stock prices of the S&P market from 1987 until 2012 with the covariance matrix of the firm returns determined in time windows of several years. The eigenvector belonging to the leading eigenvalue (market) exhibits in its long term time dependence a phase transition with an order parameter which can be interpreted within an agent-based model. From 1995 to 2005 the market is in an ordered state and after 2005 in a disordered state.

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Paper provided by in its series Papers with number 1306.2508.

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Date of creation: Jun 2013
Date of revision: Jun 2015
Publication status: Published in Journal of Economic Interaction and Coordination, 11(2), 229-246, 2016
Handle: RePEc:arx:papers:1306.2508
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