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Forward-looking asset correlations in the estimation of economic capital

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  • Chamizo, Álvaro
  • Fonollosa, Alexandre
  • Novales, Alfonso

Abstract

We analyze whether the credit market anticipated the financial crisis before the regulators using a methodology that combines the Merton model for the determination of economic capital with Vasicek’s factor model for asset correlation. Contrary to standard practice, we estimate the credit value at risk (VaR) and expected shortfall (ES) of a global loan portfolio using CDS spreads because credit derivatives incorporate forward-looking information on future systemic shocks that might be essential in the estimation of economic capital. We find that one-factor model can generally be a good representation of correlations in the credit market because of the high inter-sector correlations, although an appropriately chosen second factor can provide additional information for risk estimation in stressed times. We show that there were, indeed, signs of stress in the credit market that were not incorporated in the determination of economic capital during the crisis and that some financial institutions did not consider properly. The overall impression is that it is not so much that risk models were over-simplified to anticipate the financial crisis but rather, that they were backward-looking. A potential implication of our research is that the level of regulatory capital should react to events in the credit market.

Suggested Citation

  • Chamizo, Álvaro & Fonollosa, Alexandre & Novales, Alfonso, 2019. "Forward-looking asset correlations in the estimation of economic capital," Journal of International Financial Markets, Institutions and Money, Elsevier, vol. 61(C), pages 264-288.
    • Handle: RePEc:eee:intfin:v:61:y:2019:i:c:p:264-288
    DOI: 10.1016/j.intfin.2019.04.001
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    1. Chamizo, Álvaro & Novales, Alfonso, 2021. "Evaluation of market risk associated with hedging a credit derivative portfolio," The Quarterly Review of Economics and Finance, Elsevier, vol. 80(C), pages 411-430.
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    4. Wolfgang Schadner & Joshua Traut, 2022. "Estimating Forward-Looking Stock Correlations from Risk Factors," Mathematics, MDPI, vol. 10(10), pages 1-19, May.

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    More about this item

    Keywords

    Forward-looking asset correlation; Economic capital; Financial crisis; Asset allocation; Systemic risk;
    All these keywords.

    JEL classification:

    • E47 - Macroeconomics and Monetary Economics - - Money and Interest Rates - - - Forecasting and Simulation: Models and Applications
    • G01 - Financial Economics - - General - - - Financial Crises
    • G28 - Financial Economics - - Financial Institutions and Services - - - Government Policy and Regulation
    • G32 - Financial Economics - - Corporate Finance and Governance - - - Financing Policy; Financial Risk and Risk Management; Capital and Ownership Structure; Value of Firms; Goodwill

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