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Bank’s regulation, asset portfolio choice of banks, and macroeconomic dynamics


  • Kosuke Aoki

    (The University of Tokyo)

  • Nao Sudo

    (Bank of Japan)


Since the middle of 1990s, the Japanese banks have continuously tilted their asset portfolio towards the government bonds, reducing their lending to …rms. In this paper, we investigate the causes and consequences of such changes in the banks behaviors, by introducing the bank’s asset portfolio decision into an otherwise standard New Keynesian model. The banks in our model construct their portfolio under the value at risk constraint, that requires banks repay their debt regardless of the realization of the asset returns. Under the constraint, an increase in down-side risks, tightening of capital requirement rules or deterioration of the banks net worth reduce the banks’ risk taking capacity, and incurs a shrinkage of the bank’s balance sheet and asset rebalancing towards government bond. The changes in banks’ investment decisions dampen output and inflation. Empirical studies suggest that our theoretical predictions are consistent with behavior of the Japanese banks.

Suggested Citation

  • Kosuke Aoki & Nao Sudo, 2013. "Bank’s regulation, asset portfolio choice of banks, and macroeconomic dynamics," CARF F-Series CARF-F-323, Center for Advanced Research in Finance, Faculty of Economics, The University of Tokyo.
  • Handle: RePEc:cfi:fseres:cf323

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    References listed on IDEAS

    1. Keisuke Otsu, 2011. "Accounting for Japanese Business Cycles: A Quest for Labor Wedges," Monetary and Economic Studies, Institute for Monetary and Economic Studies, Bank of Japan, vol. 29, pages 143-170, November.
    2. Devereux, Michael B. & Sutherland, Alan, 2010. "Country portfolio dynamics," Journal of Economic Dynamics and Control, Elsevier, vol. 34(7), pages 1325-1342, July.
    3. Nao Sudo, 2011. "Accounting for the Decline in the Velocity of Money in the Japanese Economy," IMES Discussion Paper Series 11-E-16, Institute for Monetary and Economic Studies, Bank of Japan.
    4. Ricardo J. Caballero & Takeo Hoshi & Anil K. Kashyap, 2008. "Zombie Lending and Depressed Restructuring in Japan," American Economic Review, American Economic Association, vol. 98(5), pages 1943-1977, December.
    5. Thomas J. Sargent & Paolo Surico, 2011. "Two Illustrations of the Quantity Theory of Money: Breakdowns and Revivals," American Economic Review, American Economic Association, vol. 101(1), pages 109-128, February.
    6. Yasuo Hirose & Takushi Kurozumi, 2012. "Do Investment-Specific Technological Changes Matter For Business Fluctuations? Evidence From Japan," Pacific Economic Review, Wiley Blackwell, vol. 17(2), pages 208-230, May.
    7. Takuji Fueki & Ichiro Fukunaga & Hibiki Ichiue & Toyoichiro Shirota, 2016. "Measuring Potential Growth with an Estimated DSGE Model of Japan’s Economy," International Journal of Central Banking, International Journal of Central Banking, vol. 12(1), pages 1-32, March.
    8. Michael B. Devereux & Alan Sutherland, 2011. "Country Portfolios In Open Economy Macro‐Models," Journal of the European Economic Association, European Economic Association, vol. 9(2), pages 337-369, April.
    9. Doi, Takero & Hoshi, Takeo & Okimoto, Tatsuyoshi, 2011. "Japanese government debt and sustainability of fiscal policy," Journal of the Japanese and International Economies, Elsevier, vol. 25(4), pages 414-433.
    10. Rotemberg, Julio J, 1982. "Sticky Prices in the United States," Journal of Political Economy, University of Chicago Press, vol. 90(6), pages 1187-1211, December.
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    Cited by:

    1. Grzegorz Hałaj, 2016. "Dynamic Balance Sheet Model With Liquidity Risk," International Journal of Theoretical and Applied Finance (IJTAF), World Scientific Publishing Co. Pte. Ltd., vol. 19(07), pages 1-37, November.

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