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Lost in Diversification

Author

Listed:
  • Marco Bardoscia
  • Daniele d'Arienzo
  • Matteo Marsili
  • Valerio Volpati
Abstract
As financial instruments grow in complexity more and more information is neglected by risk optimization practices. This brings down a curtain of opacity on the origination of risk, that has been one of the main culprits in the 2007-2008 global financial crisis. We discuss how the loss of transparency may be quantified in bits, using information theoretic concepts. We find that {\em i)} financial transformations imply large information losses, {\em ii)} portfolios are more information sensitive than individual stocks only if fundamental analysis is sufficiently informative on the co-movement of assets, that {\em iii)} securitisation, in the relevant range of parameters, yields assets that are less information sensitive than the original stocks and that {\em iv)} when diversification (or securitisation) is at its best (i.e. when assets are uncorrelated) information losses are maximal. We also address the issue of whether pricing schemes can be introduced to deal with information losses. This is relevant for the transmission of incentives to gather information on the risk origination side. Within a simple mean variance scheme, we find that market incentives are not generally sufficient to make information harvesting sustainable.

Suggested Citation

  • Marco Bardoscia & Daniele d'Arienzo & Matteo Marsili & Valerio Volpati, 2019. "Lost in Diversification," Papers 1901.09795, arXiv.org.
  • Handle: RePEc:arx:papers:1901.09795
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    References listed on IDEAS

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    1. Rajan, Uday & Seru, Amit & Vig, Vikrant, 2015. "The failure of models that predict failure: Distance, incentives, and defaults," Journal of Financial Economics, Elsevier, vol. 115(2), pages 237-260.
    2. Battiston, Stefano & Delli Gatti, Domenico & Gallegati, Mauro & Greenwald, Bruce & Stiglitz, Joseph E., 2012. "Liaisons dangereuses: Increasing connectivity, risk sharing, and systemic risk," Journal of Economic Dynamics and Control, Elsevier, vol. 36(8), pages 1121-1141.
    3. Jean-Philippe Bouchaud & Damien Challet, 2016. "Why have asset price properties changed so little in 200 years," Papers 1605.00634, arXiv.org.
    4. Thomas Lux & Michele Marchesi, 1999. "Scaling and criticality in a stochastic multi-agent model of a financial market," Nature, Nature, vol. 397(6719), pages 498-500, February.
    5. Rossen Valkanov & Andra Ghent, 2014. "Complexity in Structured Finance: Financial Wizardry or Smoke and Mirrors," 2014 Meeting Papers 104, Society for Economic Dynamics.
    6. Raghuram G. Rajan, 2006. "Has Finance Made the World Riskier?," European Financial Management, European Financial Management Association, vol. 12(4), pages 499-533, September.
    7. Joshua Coval & Jakub Jurek & Erik Stafford, 2009. "The Economics of Structured Finance," Journal of Economic Perspectives, American Economic Association, vol. 23(1), pages 3-25, Winter.
    8. Aikman, David & Haldane, Andrew & Hinterschweiger, Marc & Kapadia, Sujit, 2018. "Rethinking financial stability," Bank of England working papers 712, Bank of England.
    9. Andrew G. Haldane & Robert M. May, 2011. "Systemic risk in banking ecosystems," Nature, Nature, vol. 469(7330), pages 351-355, January.
    10. Fabio Caccioli & Matteo Marsili & Pierpaolo Vivo, 2009. "Eroding market stability by proliferation of financial instruments," Papers 0910.0064, arXiv.org.
    11. F. Caccioli & M. Marsili & P. Vivo, 2009. "Eroding market stability by proliferation of financial instruments," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 71(4), pages 467-479, October.
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    Cited by:

    1. L'eo Touzo & Matteo Marsili & Don Zagier, 2020. "Information thermodynamics of financial markets: the Glosten-Milgrom model," Papers 2010.01905, arXiv.org, revised Jan 2021.

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