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Diversification and systemic risk in the banking system

Author

Listed:
  • Ma, Jing
  • He, Jianmin
  • Liu, Xiaoxing
  • Wang, Chao

Abstract

The recent financial crisis has motivated efforts to understand how systemic risk endogenously arises and what structure can make the financial system more stable. This paper provides a comprehensive model with a heterogeneous interbank network and overlapping portfolios in order to study the systemic risk contagion. The effects of interbank counterparty diversification and investment portfolio diversification on systemic risk are compared and validated. The results show that investment portfolio diversification is more effective in certain cases in which the illiquid assets are sensitive to fire sales. In addition, a high leverage ratio for an individual bank promotes the stability of the banking system and the reserve-deposit ratio. The banking system is more stable when the interbank network has high heterogeneity and a low clustering coefficient. All results are discussed in relation to the potential regulations that are aimed at reducing systemic risk.

Suggested Citation

  • Ma, Jing & He, Jianmin & Liu, Xiaoxing & Wang, Chao, 2019. "Diversification and systemic risk in the banking system," Chaos, Solitons & Fractals, Elsevier, vol. 123(C), pages 413-421.
    • Handle: RePEc:eee:chsofr:v:123:y:2019:i:c:p:413-421
    DOI: 10.1016/j.chaos.2019.03.040
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    Cited by:

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    2. Baumöhl, Eduard & Bouri, Elie & Hoang, Thi-Hong-Van & Shahzad, Syed Jawad Hussain & Výrost, Tomáš, 2020. "Increasing systemic risk during the Covid-19 pandemic: A cross-quantilogram analysis of the banking sector," EconStor Preprints 222580, ZBW - Leibniz Information Centre for Economics.
    3. Huang, Yajing & Liu, Taoxiong & Lien, Donald, 2023. "Portfolio homogeneity and systemic risk of financial networks," Journal of Empirical Finance, Elsevier, vol. 70(C), pages 248-275.
    4. Yan, Chun & Ding, Yi & Liu, Wei & Liu, Xinhong & Liu, Jiahui, 2023. "Multilayer interbank networks and systemic risk propagation: Evidence from China," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 628(C).
    5. Yajing Huang & Taoxiong Liu, 2023. "Diversification and Systemic Risk of Networks Holding Common Assets," Computational Economics, Springer;Society for Computational Economics, vol. 61(1), pages 341-388, January.
    6. Wu, Xin & Bai, Xiao & Qi, Hanying & Lu, Lanxin & Yang, Mingyuan & Taghizadeh-Hesary, Farhad, 2023. "The impact of climate change on banking systemic risk," Economic Analysis and Policy, Elsevier, vol. 78(C), pages 419-437.
    7. Ćehajić, Aida & Košak, Marko, 2021. "Macroprudential measures and developments in bank funding costs," International Review of Financial Analysis, Elsevier, vol. 78(C).
    8. Wang, Lu, 2021. "Time-varying conditional beta, return spillovers, and dynamic bank diversification strategies," The Quarterly Review of Economics and Finance, Elsevier, vol. 79(C), pages 272-280.

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