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News Reaction in Financial Markets within a Behavioral Finance Model with Heterogeneous Agents

  • Fischer, Thomas

This paper presents a Heterogeneous Agent Model of a financial market with chartist and fundamentalist traders that exhibit bounded rationality and short-term thinking to explain the effect of under and overreaction to news. The existence of the Market Maker's finite price adjustment speed leads to the fact that prices do not adjust instantaneously to new information. Chartists use moving average rules to make their investment decisions. Chartist can transform an underreaction-only scenario into a market with overreaction. The use of long moving average rules might even make the market unstable. Furthermore, noise in financial markets can lead to long time decoupling from fundamental value. Higher market efficiency (low deviations from fundamental value), on the other hand, is achieved if high rationality and long-term thinking for the agents is assumed.

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Paper provided by Darmstadt Technical University, Department of Business Administration, Economics and Law, Institute of Economics (VWL) in its series Darmstadt Discussion Papers in Economics with number 54196.

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Date of creation: 01 Sep 2011
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Publication status: Published in Darmstadt Discussion Papers in Economics . 205 (2011-09-01)
Handle: RePEc:dar:ddpeco:54196
Note: for complete metadata visit http://tubiblio.ulb.tu-darmstadt.de/54196/
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