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The effect of possible EU diversification requirements on the risk of banks’ sovereign bond portfolios

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  • Craig, Ben
  • Giuzio, Margherita
  • Paterlini, Sandra

Abstract

Recent policy discussion includes the introduction of diversification requirements for sovereign bond portfolios of European banks. In this paper, we evaluate the possible effects of these constraints on risk and diversification in the sovereign bond portfolios of the major European banks. First, we capture the dependence structure of European countries' sovereign risks and identify the common factors driving European sovereign CDS spreads by means of an independent component analysis. We then analyse the risk and diversification in the sovereign bond portfolios of the largest European banks and discuss the role of “home bias”, i.e. the tendency of banks to concentrate their sovereign bond holdings in their domicile country. Finally, we evaluate the effect of diversification requirements on the tail risk of sovereign bond portfolios. Under our assumptions about how banks rebalance their portfolio to respond to the new requirements, demanding that banks modify their holdings to increase their portfolio diversification may be ineffective in reducing portfolio risk, including tail risk. JEL Classification: G01, G11, G21, G28

Suggested Citation

  • Craig, Ben & Giuzio, Margherita & Paterlini, Sandra, 2020. "The effect of possible EU diversification requirements on the risk of banks’ sovereign bond portfolios," Working Paper Series 2384, European Central Bank.
    • Handle: RePEc:ecb:ecbwps:20202384
    Note: 3546207
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    Cited by:

    1. Craig, Ben & Giuzio, Margherita & Paterlini, Sandra, 2019. "The effect of possible EU diversification requirements on the risk of banks' sovereign bond portfolios," ESRB Working Paper Series 89, European Systemic Risk Board.
    2. Ambrocio, Gene & Gu, Xian & Hasan, Iftekhar & Politsidis, Panagiotis N., 2022. "The diplomacy discount in global syndicated loans," Journal of International Money and Finance, Elsevier, vol. 120(C).
    3. Rancan, Michela & Cariboni, Jessica & Keasey, Kevin & Vallascas, Francesco, 2023. "Bond issuance and the funding choices of European banks: The consequences of public debt," Journal of Empirical Finance, Elsevier, vol. 74(C).
    4. Sam Langfield, 2020. "Bridge over Troubled Monetary Union: A Reply to De Grauwe & Ji," Journal of Common Market Studies, Wiley Blackwell, vol. 58(S1), pages 1-10, September.

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    More about this item

    Keywords

    bank regulation; diversification; home bias; sovereign-bank nexus; sovereign risk;
    All these keywords.

    JEL classification:

    • G01 - Financial Economics - - General - - - Financial Crises
    • G11 - Financial Economics - - General Financial Markets - - - Portfolio Choice; Investment Decisions
    • G21 - Financial Economics - - Financial Institutions and Services - - - Banks; Other Depository Institutions; Micro Finance Institutions; Mortgages
    • G28 - Financial Economics - - Financial Institutions and Services - - - Government Policy and Regulation

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