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Calculating trading book capital: Is risk separation appropriate?

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  • Raupach, Peter

Abstract

Regulatory capital for trading book positions includes two components that cover different risks but apply to the same portfolio, one for market risk and one for credit risk. Similar approaches are common in banks' internal models for economic capital. Although it is known that joint market and credit risk of certain investments can be larger than the sum of risks, the problematic cases identified so far have been relatively exotic. I show that very common investments - corporate bond holdings or CDS portfolios - are also affected. There are realistic conditions under which credit risk (represented by ratings and default) and spread risk (represented by rating specific spread indices) combine to a total value-at-risk (VaR) 50 percent larger than the sum of spread and credit VaR; this effect is even stronger for the expected shortfall. If migration risk is segregated from default risk and incorporated into spread risk, as recently put forward by the Basel Committee, total risk is no longer underestimated. Furthermore, I improve a theoretic result of Breuer et al. (2010) that defines a sufficient condition under which risk separation is harmless.

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  • Raupach, Peter, 2015. "Calculating trading book capital: Is risk separation appropriate?," Discussion Papers 19/2015, Deutsche Bundesbank.
    • Handle: RePEc:zbw:bubdps:192015
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    1. Alessandri, Piergiorgio & Drehmann, Mathias, 2010. "An economic capital model integrating credit and interest rate risk in the banking book," Journal of Banking & Finance, Elsevier, vol. 34(4), pages 730-742, April.
    2. Barnhill Jr., Theodore M. & Maxwell, William F., 2002. "Modeling correlated market and credit risk in fixed income portfolios," Journal of Banking & Finance, Elsevier, vol. 26(2-3), pages 347-374, March.
    3. Breuer, Thomas & Jandacka, Martin & Rheinberger, Klaus & Summer, Martin, 2010. "Does adding up of economic capital for market- and credit risk amount to conservative risk assessment?," Journal of Banking & Finance, Elsevier, vol. 34(4), pages 703-712, April.
    4. Acerbi, Carlo, 2002. "Spectral measures of risk: A coherent representation of subjective risk aversion," Journal of Banking & Finance, Elsevier, vol. 26(7), pages 1505-1518, July.
    5. Acerbi, Carlo & Tasche, Dirk, 2002. "On the coherence of expected shortfall," Journal of Banking & Finance, Elsevier, vol. 26(7), pages 1487-1503, July.
    6. Elena Medova & Robert Smith, 2005. "A framework to measure integrated risk," Quantitative Finance, Taylor & Francis Journals, vol. 5(1), pages 105-121.
    7. Jarrow, Robert A. & Turnbull, Stuart M., 2000. "The intersection of market and credit risk," Journal of Banking & Finance, Elsevier, vol. 24(1-2), pages 271-299, January.
    8. Hillebrand, Martin & Böcker, Klaus, 2008. "Interaction of market and credit risk: an analysis of inter-risk correlation and risk aggregation," Discussion Paper Series 2: Banking and Financial Studies 2008,11, Deutsche Bundesbank.
    9. repec:bla:ecnote:v:33:y:2004:i:3:p:375-398 is not listed on IDEAS
    10. Carey, Mark & Hrycay, Mark, 2001. "Parameterizing credit risk models with rating data," Journal of Banking & Finance, Elsevier, vol. 25(1), pages 197-270, January.
    11. Philip Lowe & Miguel Angel Segoviano, 2002. "Internal ratings, the business cycle, and capital requirements: some evidence from an emerging market economy," Conference Series ; [Proceedings], Federal Reserve Bank of Boston.
    12. Philip Lowe & Miguel A. Segoviano, 2002. "Internal ratings, the business cycle and capital requirements: some evidence from an emerging market economy," BIS Working Papers 117, Bank for International Settlements.
    13. Segoviano, Miguel A. & Lowe, Philip, 2002. "Internal ratings, the business cycle and capital requirements: some evidence from an emerging market economy," LSE Research Online Documents on Economics 24948, London School of Economics and Political Science, LSE Library.
    14. Philippe Artzner & Freddy Delbaen & Jean‐Marc Eber & David Heath, 1999. "Coherent Measures of Risk," Mathematical Finance, Wiley Blackwell, vol. 9(3), pages 203-228, July.
    15. Düllmann, Klaus & Trapp, Monika, 2004. "Systematic Risk in Recovery Rates: An Empirical Analysis of US Corporate Credit Exposures," Discussion Paper Series 2: Banking and Financial Studies 2004,02, Deutsche Bundesbank.
    16. Philip Lowe, 2002. "Internal ratings, the business cycle and capital requirements: some evidence from an emerging market economy," FMG Discussion Papers dp428, Financial Markets Group.
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    Cited by:

    1. Božović, Miloš & Ivanović, Jelena, 2017. "Adverse risk interaction: An integrated approach," Economic Modelling, Elsevier, vol. 65(C), pages 67-74.

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    More about this item

    Keywords

    Economic capital; Bank capital requirements; Risk measures; Risk aggregation; Trading book;
    All these keywords.

    JEL classification:

    • G32 - Financial Economics - - Corporate Finance and Governance - - - Financing Policy; Financial Risk and Risk Management; Capital and Ownership Structure; Value of Firms; Goodwill
    • G21 - Financial Economics - - Financial Institutions and Services - - - Banks; Other Depository Institutions; Micro Finance Institutions; Mortgages
    • C15 - Mathematical and Quantitative Methods - - Econometric and Statistical Methods and Methodology: General - - - Statistical Simulation Methods: General

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