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A Q-Theory of Banks

Author

Listed:
  • Juliane Begenau
  • Saki Bigio
  • Jeremy Majerovitz
  • Matias Vieyra

Abstract

We introduce a dynamic bank theory featuring delayed loss recognition and a regulatory capital constraint, aiming to match the bank leverage dynamics captured by Tobin’s Q. We start from four facts: (1) book and market equity values diverge, especially during crises; (2) Tobin’s Q predicts future bank profitability; (3) neither book nor market leverage constraints are strictly binding for most banks; and (4) bank leverage and Tobin’s Q are mean reverting but highly persistent. We demonstrate that delayed loss accounting rules interact with bank capital requirements, introducing a tradeoff between loan growth and financial fragility. Our welfare analysis implies that accounting rules and capital regulation should optimally be set jointly. This paper emphasizes the need to reconcile regulatory dependence on book values with the market’s emphasis on fundamental values to enhance understanding of banking dynamics and improve regulatory design.

Suggested Citation

  • Juliane Begenau & Saki Bigio & Jeremy Majerovitz & Matias Vieyra, 2024. "A Q-Theory of Banks," Working Papers 201, Peruvian Economic Association.
    • Handle: RePEc:apc:wpaper:201
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    Cited by:

    1. Faria-e-Castro, Miguel & Paul, Pascal & Sánchez, Juan M., 2024. "Evergreening," Journal of Financial Economics, Elsevier, vol. 153(C).
      • Miguel Faria-e-Castro & Pascal Paul & Juan M. Sanchez, 2021. "Evergreening," Working Papers 2021-012, Federal Reserve Bank of St. Louis, revised Aug 2023.
      • Miguel Faria-e-Castro & Pascal Paul & Juan M. Sanchez, 2022. "Evergreening," Working Paper Series 2022-14, Federal Reserve Bank of San Francisco.
    2. Reiter, Michael & Zessner-Spitzenberg, Leopold, 2023. "Long-term bank lending and the transfer of aggregate risk," Journal of Economic Dynamics and Control, Elsevier, vol. 151(C).
    3. Kirstin Hubrich & Daniel F. Waggoner, 2022. "The transmission of financial shocks and leverage of financial institutions: An endogenous regime switching framework," Finance and Economics Discussion Series 2022-034, Board of Governors of the Federal Reserve System (U.S.).
    4. Barbaro, Bianca & Tirelli, Patrizio, 2021. "Forbearance vs foreclosure in a general equilibrium model," Working Paper Series 2531, European Central Bank.

    More about this item

    Keywords

    Bank Leverage Dynamics; Market vs. Book Values; Accounting Rules; Bank Regulation; Financial Stability;
    All these keywords.

    JEL classification:

    • G21 - Financial Economics - - Financial Institutions and Services - - - Banks; Other Depository Institutions; Micro Finance Institutions; Mortgages
    • G32 - Financial Economics - - Corporate Finance and Governance - - - Financing Policy; Financial Risk and Risk Management; Capital and Ownership Structure; Value of Firms; Goodwill
    • G33 - Financial Economics - - Corporate Finance and Governance - - - Bankruptcy; Liquidation
    • E44 - Macroeconomics and Monetary Economics - - Money and Interest Rates - - - Financial Markets and the Macroeconomy

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