IDEAS home Printed from https://ideas.repec.org/p/zbw/bubdps/192015.html
   My bibliography  Save this paper

Calculating trading book capital: Is risk separation appropriate?

Author

Listed:
  • 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.

Suggested Citation

  • Raupach, Peter, 2015. "Calculating trading book capital: Is risk separation appropriate?," Discussion Papers 19/2015, Deutsche Bundesbank.
    • Handle: RePEc:zbw:bubdps:192015
    as

    Download full text from publisher

    File URL: https://www.econstor.eu/bitstream/10419/112763/1/832193801.pdf
    Download Restriction: no
    ---><---

    References listed on IDEAS

    as
    1. 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.
    2. 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.
    3. repec:bla:ecnote:v:33:y:2004:i:3:p:375-398 is not listed on IDEAS
    4. 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.
    5. 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.
    6. Carey, Mark & Hrycay, Mark, 2001. "Parameterizing credit risk models with rating data," Journal of Banking & Finance, Elsevier, vol. 25(1), pages 197-270, January.
    7. 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.
    8. 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.
    9. 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.
    10. 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.
    11. 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.
    12. Acerbi, Carlo & Tasche, Dirk, 2002. "On the coherence of expected shortfall," Journal of Banking & Finance, Elsevier, vol. 26(7), pages 1487-1503, July.
    13. Elena Medova & Robert Smith, 2005. "A framework to measure integrated risk," Quantitative Finance, Taylor & Francis Journals, vol. 5(1), pages 105-121.
    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.
    Full references (including those not matched with items on IDEAS)

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

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

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. International Association of Deposit Insurers, 2011. "Evaluation of Deposit Insurance Fund Sufficiency on the Basis of Risk Analysis," IADI Research Papers 11-11, International Association of Deposit Insurers.
    2. Andre Lucas & Bastiaan Verhoef, 2012. "Aggregating Credit and Market Risk: The Impact of Model Specification," Tinbergen Institute Discussion Papers 12-057/2/DSF36, Tinbergen Institute.
    3. Athanasoglou, Panayiotis P. & Daniilidis, Ioannis & Delis, Manthos D., 2014. "Bank procyclicality and output: Issues and policies," Journal of Economics and Business, Elsevier, vol. 72(C), pages 58-83.
    4. Eva Catarineu-Rabell & Patricia Jackson & Dimitrios Tsomocos, 2005. "Procyclicality and the new Basel Accord - banks’ choice of loan rating system," Economic Theory, Springer;Society for the Advancement of Economic Theory (SAET), vol. 26(3), pages 537-557, October.
    5. Markus Behn & Rainer Haselmann & Paul Wachtel, 2016. "Procyclical Capital Regulation and Lending," Journal of Finance, American Finance Association, vol. 71(2), pages 919-956, April.
    6. Ali, Syed Babar, 2012. "Quality of Internal Risk Rating Frameworks at Commercial Banks in Pakistan," MPRA Paper 55117, University Library of Munich, Germany.
    7. 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.
    8. Sebastián Nieto Parra, 2005. "The Macroeconomic Implications of the New Banking Capital Regulation in Emerging Markets: A Duopoly Model Adapted to Risk-Averse Banks," Post-Print hal-01020776, HAL.
    9. Anatoly Peresetsky & Alexandr Karminsky & Sergei Golovan, 2011. "Probability of default models of Russian banks," Economic Change and Restructuring, Springer, vol. 44(4), pages 297-334, November.
    10. Maria Stefanova, 2012. "Recovery Risiko in der Kreditportfoliomodellierung," Springer Books, Springer, number 978-3-8349-4226-5, January.
    11. Griffith-Jones, Stephany & Ocampo, José Antonio, 2003. "What progress on international financial reform? why so limited?," Sede de la CEPAL en Santiago (Estudios e Investigaciones) 34941, Naciones Unidas Comisión Económica para América Latina y el Caribe (CEPAL).
    12. Božović, Miloš & Ivanović, Jelena, 2017. "Adverse risk interaction: An integrated approach," Economic Modelling, Elsevier, vol. 65(C), pages 67-74.
    13. Ines Drumond, 2009. "Bank Capital Requirements, Business Cycle Fluctuations And The Basel Accords: A Synthesis," Journal of Economic Surveys, Wiley Blackwell, vol. 23(5), pages 798-830, December.
    14. Rodriguez, Analía, 2007. "Distribución de pérdidas de la cartera de créditos: el método unifactorial de Basilea II vs. estimaciones no paramétricas," MPRA Paper 12637, University Library of Munich, Germany.
    15. Mr. C. A. E. Goodhart & Miguel A. Segoviano & Boris Hofmann, 2006. "Default, Credit Growth, and Asset Prices," IMF Working Papers 2006/223, International Monetary Fund.
    16. Fabrizio Fabi & Sebastiano Laviola & Paolo Marullo Reedtz, 2004. "The treatment of SMEs loans in the New Basel Capital Accord: some evaluations," BNL Quarterly Review, Banca Nazionale del Lavoro, vol. 57(228), pages 29-70.
    17. Claudio Borio, 2011. "Rediscovering the Macroeconomic Roots of Financial Stability Policy: Journey, Challenges, and a Way Forward," Annual Review of Financial Economics, Annual Reviews, vol. 3(1), pages 87-117, December.
    18. repec:zbw:bofitp:2004_021 is not listed on IDEAS
    19. Mérő, Katalin, 2018. "A kockázatalapú bankszabályozás előretörése és visszaszorulása - az ösztönzési struktúrák szerepe [The emergence and decline of risk-based bank regulation the role of incentive structures]," Közgazdasági Szemle (Economic Review - monthly of the Hungarian Academy of Sciences), Közgazdasági Szemle Alapítvány (Economic Review Foundation), vol. 0(10), pages 981-1005.
    20. Wei, Lu & Li, Guowen & Li, Jianping & Zhu, Xiaoqian, 2019. "Bank risk aggregation with forward-looking textual risk disclosures," The North American Journal of Economics and Finance, Elsevier, vol. 50(C).
    21. Пересецкий А.А., 2007. "Методы Оценки Вероятности Дефолта Банков," Журнал Экономика и математические методы (ЭММ), Центральный Экономико-Математический Институт (ЦЭМИ), vol. 43(3), июль.

    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

    NEP fields

    This paper has been announced in the following NEP Reports:

    Statistics

    Access and download statistics

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:zbw:bubdps:192015. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: ZBW - Leibniz Information Centre for Economics (email available below). General contact details of provider: https://edirc.repec.org/data/dbbgvde.html .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.