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Contagion in Debt and Collateral Markets

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  • Chang, Jin-Wook

Abstract

This paper investigates contagion in financial networks through both debt and collateral markets. Payment from a collateralized debt contract depends not only on the borrower's balance sheet but also on the price of the underlying collateral. I show that the existence of the collateral channel of contagion amplifies the contagion from the counterparty channel, and this additional channel generates different patterns of contagion for a given network structure. If the negative liquidity shock is small, then having more connections make the network safer as contagion through debt channel is minimized by diversified exposures while contagion through collateral channel is limited. However, if the liquidity shock is large, then having more connections make the network more vulnerable as contagions through both debt and collateral channels are maximized by more exposures. The most novel and surprising result is that the ring network is safer than the complete network when the shock is large. This is because the ring network minimizes the contagion through collateral channel while maximizing the contagion through debt channel. The model also provides the minimum collateral-debt ratio (haircut) to attain robust macro-prudential state for a given network structure and aggregate shock.

Suggested Citation

  • Chang, Jin-Wook, 2021. "Contagion in Debt and Collateral Markets," MPRA Paper 111131, University Library of Munich, Germany.
  • Handle: RePEc:pra:mprapa:111131
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    More about this item

    Keywords

    collateral; contagion; debt; financial networks; interconnectedness; systemic risk;
    All these keywords.

    JEL classification:

    • D52 - Microeconomics - - General Equilibrium and Disequilibrium - - - Incomplete Markets
    • D53 - Microeconomics - - General Equilibrium and Disequilibrium - - - Financial Markets
    • E44 - Macroeconomics and Monetary Economics - - Money and Interest Rates - - - Financial Markets and the Macroeconomy
    • G23 - Financial Economics - - Financial Institutions and Services - - - Non-bank Financial Institutions; Financial Instruments; Institutional Investors
    • G24 - Financial Economics - - Financial Institutions and Services - - - Investment Banking; Venture Capital; Brokerage
    • G28 - Financial Economics - - Financial Institutions and Services - - - Government Policy and Regulation

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