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Re-use of collateral: leverage, volatility, and welfare

Author

Listed:
  • Brumm, Johannes
  • Grill, Michael
  • Kubler, Felix
  • Schmedders, Karl

Abstract

We assess the quantitative implications of collateral re-use on leverage, volatility, and welfare within an infinite-horizon asset-pricing model with heterogeneous agents. In our model, the ability of agents to reuse frees up collateral that can be used to back more transactions. Re-use thus contributes to the buildup of leverage and significantly increases volatility in financial markets. When introducing limits on re-use, we find that volatility is strictly decreasing as these limits become tighter, yet the impact on welfare is non-monotone. In the model, allowing for some re-use can improve welfare as it enables agents to share risk more effectively. Allowing re-use beyond intermediate levels, however, can lead to excessive leverage and lower welfare. So the analysis in this paper provides a rationale for limiting, yet not banning, re-use in financial markets. JEL Classification: D53, G01, G12, G18

Suggested Citation

  • Brumm, Johannes & Grill, Michael & Kubler, Felix & Schmedders, Karl, 2018. "Re-use of collateral: leverage, volatility, and welfare," Working Paper Series 2218, European Central Bank.
  • Handle: RePEc:ecb:ecbwps:20182218
    Note: 1280809
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    More about this item

    Keywords

    heterogeneous agents; leverage; re-use of collateral; volatility; welfare;
    All these keywords.

    JEL classification:

    • D53 - Microeconomics - - General Equilibrium and Disequilibrium - - - Financial Markets
    • G01 - Financial Economics - - General - - - Financial Crises
    • G12 - Financial Economics - - General Financial Markets - - - Asset Pricing; Trading Volume; Bond Interest Rates
    • G18 - Financial Economics - - General Financial Markets - - - Government Policy and Regulation

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