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Collateral Unchained : Rehypothecation networks, concentration and systemic effects

Author

Listed:
  • Duc Thi Luu

    (University of Kiel Germany and OFCE Sciences Po, Paris, France)

  • Mauro Napoletano

    (OFCE, Sciences PO, Paris,France, a SKEMA Business School, France & Scuola Superiore Sant'Anna Pisa Italy)

  • Paolo Barucca

    (Institute for Mathematical Sciences, London, UK & University of Zurich, Switzerland)

  • Stafano Battiston

    (University of Zurich, Switzerland)

Abstract

We study how network structure affects the dynamics of collateral in presence of rehypothecation. We build a simple model wherein banks interact via chains of repo contracts and use their proprietary collateral or re-use the collateral obtained by other banks via reverse repos. In this framework, we show that total collateral volume and its velocity are affected by characteristics of the network like the length of rehypothecation chains, the presence or not of chains having a cyclic structure, the direction of collateral flows, the density of the network. In addition, we show that structures where collateral flows are concentrated among few nodes (like in core-periphery networks) allow large increases in collateral volumes already with small network density. Furthermore, we introduce in the model collateral hoarding rates determined according to a Value-at-Risk (VaR) criterion, and we then study the emergence of collateral hoarding cascades in different networks. Our results highlight that network structures with highly concentrated collateral flows are also more exposed to large collateral hoarding cascades following local shocks. These networks are therefore characterized by a trade-off between liquidity and systemic risk.

Suggested Citation

  • Duc Thi Luu & Mauro Napoletano & Paolo Barucca & Stafano Battiston, 2018. "Collateral Unchained : Rehypothecation networks, concentration and systemic effects," Documents de Travail de l'OFCE 2018-07, Observatoire Francais des Conjonctures Economiques (OFCE).
  • Handle: RePEc:fce:doctra:1807
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    References listed on IDEAS

    as
    1. Adrian, Tobias & Shin, Hyun Song, 2010. "Liquidity and leverage," Journal of Financial Intermediation, Elsevier, vol. 19(3), pages 418-437, July.
    2. Bottazzi, Jean-Marc & Luque, Jaime & Páscoa, Mário R., 2012. "Securities market theory: Possession, repo and rehypothecation," Journal of Economic Theory, Elsevier, vol. 147(2), pages 477-500.
    3. Andolfatto, David & Martin, Fernando M. & Zhang, Shengxing, 2017. "Rehypothecation and liquidity," European Economic Review, Elsevier, vol. 100(C), pages 488-505.
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    5. de Haan, Leo & van den End, Jan Willem, 2013. "Banks’ responses to funding liquidity shocks: Lending adjustment, liquidity hoarding and fire sales," Journal of International Financial Markets, Institutions and Money, Elsevier, vol. 26(C), pages 152-174.
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    7. Viral V. Acharya & Ouarda Merrouche, 2013. "Precautionary Hoarding of Liquidity and Interbank Markets: Evidence from the Subprime Crisis," Review of Finance, European Finance Association, vol. 17(1), pages 107-160.
    8. Jeannette Capel & Anouk Levels, 2014. "Collateral optimisation, re-use and transformation," DNB Occasional Studies 1205, Netherlands Central Bank, Research Department.
    9. Gorton, Gary & Metrick, Andrew, 2012. "Securitized banking and the run on repo," Journal of Financial Economics, Elsevier, vol. 104(3), pages 425-451.
    10. Manmohan Singh, 2011. "Velocity of Pledged Collateral; Analysis and Implications," IMF Working Papers 11/256, International Monetary Fund.
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    Cited by:

    1. Jean-Luc Gaffard & Mauro Napoletano, 2018. "Hétérogénéité des agents, interconnexions financières et politique monétaire : une approche non conventionnelle," Revue française d'économie, Presses de Sciences-Po, vol. 0(3), pages 201-231.

    More about this item

    Keywords

    Rehypothecation; Collateral; Repo Contracts; Networks; Liquidity; Collateral Hoarding effects; Systemic risk;

    JEL classification:

    • G01 - Financial Economics - - General - - - Financial Crises
    • G11 - Financial Economics - - General Financial Markets - - - Portfolio Choice; Investment Decisions
    • G32 - Financial Economics - - Corporate Finance and Governance - - - Financing Policy; Financial Risk and Risk Management; Capital and Ownership Structure; Value of Firms; Goodwill
    • G33 - Financial Economics - - Corporate Finance and Governance - - - Bankruptcy; Liquidation

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