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Reduction of systemic risk by means of Pigouvian taxation

  • Vinko Zlati\'c
  • Giampaolo Gabbi
  • Hrvoje Abraham

We analyze the possibility of reduction of systemic risk in financial markets through Pigouvian taxation of financial institutions which is used to support the rescue fund. We introduce the concept of the cascade risk with a clear operational definition as a subclass and a network related measure of the systemic risk. Using financial networks constructed from real Italian money market data and using realistic parameters, we show that the cascade risk can be substantially reduced by a small rate of taxation and by means of a simple strategy of the money transfer from the rescue fund to interbanking market subjects. Furthermore, we show that while negative effects on the return on investment ($ROI$) are direct and certain, an overall positive effect on risk adjusted return on investments ($ROI^{RA}$) is visible. Please note that \emph{the taxation} is introduced as a monetary/regulatory, not as a fiscal measure, as the term could suggest. \emph{The rescue fund} is implemented in a form of a common reserve fund.

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Paper provided by in its series Papers with number 1406.5817.

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Date of creation: Jun 2014
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Handle: RePEc:arx:papers:1406.5817
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