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Optimal Bank Capital

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Author Info

  • Miles, David

    ()
    (Monetary Policy Committee Unit, Bank of England)

  • Yang, Jing

    ()
    (Monetary Policy Committee Unit, Bank of England)

  • Marcheggiano, Gilberto

    ()
    (Monetary Policy Committee Unit, Bank of England)

Abstract

This paper reports estimates of the long-run costs and benefits of banks funding more of their assets with loss-absorbing capital, or equity. Measuring those costs requires careful consideration of a wide range of issues about how shifts in funding affect required rates of return and on how costs are influenced by the tax system; it also rqeuires a clear distinction to be drawn between costs to individual institutions (private costs) and overall economic (or social) costs. Without a calculation of the benefits from having banks use more equity no estimate of costs - however accurate - can tell us what the optimal level of bank capital is. We use empirical evidence on UK banks to assess costs; we use data from shocks to incomes from a wide range of countries over a long period to assess risks to banks and how equity funding (or capital) protects against those risks. We find that the amount of equity capital that is likely to be desirable for banks to use is very much larger than banks have used in recent year and also higher than targets agreed under the Basel III framework.

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Bibliographic Info

Paper provided by Monetary Policy Committee Unit, Bank of England in its series Discussion Papers with number 31.

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Length: 53 pages
Date of creation: 01 Apr 2011
Date of revision:
Handle: RePEc:mpc:wpaper:0031

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Related research

Keywords: Banks; capital regulation; capital structure; cost of equity; leverage; Modigliani-Miller;

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References

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  1. Fabian Valencia & Luc Laeven, 2008. "Systemic Banking Crises: A New Database," IMF Working Papers 08/224, International Monetary Fund.
  2. Barnes, Sebastian & Price, Simon & Sebastia Barriel, Maria, 2008. "The elasticity of substitution: evidence from a UK firm-level data set," Bank of England working papers 348, Bank of England.
  3. Diamond, Douglas W & Dybvig, Philip H, 1983. "Bank Runs, Deposit Insurance, and Liquidity," Journal of Political Economy, University of Chicago Press, vol. 91(3), pages 401-19, June.
  4. Calomiris, Charles W & Kahn, Charles M, 1991. "The Role of Demandable Debt in Structuring Optimal Banking Arrangements," American Economic Review, American Economic Association, vol. 81(3), pages 497-513, June.
  5. John R. Graham, 2003. "Taxes and Corporate Finance: A Review," Review of Financial Studies, Society for Financial Studies, vol. 16(4), pages 1075-1129.
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  7. Miller, Merton H., 1995. "Do the M & M propositions apply to banks?," Journal of Banking & Finance, Elsevier, vol. 19(3-4), pages 483-489, June.
  8. Auerbach, Alan J., 2002. "Taxation and corporate financial policy," Handbook of Public Economics, in: A. J. Auerbach & M. Feldstein (ed.), Handbook of Public Economics, edition 1, volume 3, chapter 19, pages 1251-1292 Elsevier.
  9. Fleissig, Adrian R. & Strauss, Jack, 1999. "Is OECD real per capita GDP trend or difference stationary? Evidence from panel unit root tests," Journal of Macroeconomics, Elsevier, vol. 21(4), pages 673-689.
  10. Perron, Pierre, 1988. "Trends and random walks in macroeconomic time series : Further evidence from a new approach," Journal of Economic Dynamics and Control, Elsevier, vol. 12(2-3), pages 297-332.
  11. Diamond, Douglas W, 1984. "Financial Intermediation and Delegated Monitoring," Review of Economic Studies, Wiley Blackwell, vol. 51(3), pages 393-414, July.
  12. Barro, Robert, 2006. "Rare Disasters and Asset Markets in the Twentieth Century," Scholarly Articles 3208215, Harvard University Department of Economics.
  13. Yue Cheng & Christopher J. Green, 2008. "Taxes And Capital Structure: A Study Of European Companies," Manchester School, University of Manchester, vol. 76(S1), pages 85-115, 09.
  14. Carmen M. Reinhart & Kenneth S. Rogoff, 2009. "This Time Is Different: Eight Centuries of Financial Folly," Economics Books, Princeton University Press, edition 1, volume 1, number 8973.
  15. Ray Barrell & E Philip Davis & Tatiana Fic & Dawn Holland & Simon Kirby & Iana Liadze, 2009. "Optimal Regulation of Bank Capital and Liquidity: How to Calibrate New International Standards," Occasional Papers 38, Financial Services Authority.
  16. Alfons Weichenrieder & Tina Klautke, 2008. "Taxes and the Efficiency Costs of Capital Distortions," CESifo Working Paper Series 2431, CESifo Group Munich.
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