중앙은행의 디지털 화폐 발행과 시중은행의 수익성 = The Central Bank’s Digital Currency Issuance and the Profitability of Commercial Banks

다국어 초록 (Multilingual Abstract)

This study analyzes the impact of changes in central bank digital currency (CBDC) issuance and interest rates on commercial bank profitability, considering the interaction of individuals (savers and borrowers), commercial banks, and the government (central bank). We show that the profitability of commercial banks in the deposit sector decreases when interest rates higher than deposit rates are imposed on CBDC or liquidity constraint policies are enforced. On the other hand, if the interest rate on CBDC is lower than the deposit rate, the effect on the profitability of commercial banks is minimal, and the profitability of the loan sector is not affected by the CBDC issuance. We also suggest implications for the method of operating CBDC. If the CBDC is not operated directly by a central bank, but indirectly by commercial banks, the government's costs may decrease and the profits of the commercial banks may increase due to the business connectivity and effects of the economy of scale.

참고문헌 (Reference)

1 한재준 ; 소인환, "마이너스 금리와 은행 수익성 간의 관계 분석" 한국은행 24 (24): 55-88, 2018

2 홍광헌 ; 국찬표 ; 정영식, "국내 은행산업의 규모 및 범위의 경제에 관한 연구-선형스플라인 비용함수를 이용하여-" 한국재무학회 19 (19): 119-154, 2006

3 Friedman, M., "The optimum quantity of money. In the optimum quantity of money and other essays" Aldine 1-50, 1969

4 Mishikin F. S., "The economics of money, banking, and financial markets" Pearson 2015

5 Rogoff, K., "The curse of cash" Princeton University Press 2016

6 Bian, W., "The crowdingout effect of central bank digital currencies : A simple and generalizable payment portfolio model" 43 (43): 2021

7 Grodecka, A., "Private bank money vs central bank money: A historical lesson for CBDC introduction" Lund University Department of Economics 2021

8 Jia, P., "Negative interest rates on central bank digital currency" School of Economics, Nanjing University 2022

9 Diamond, P. A., "National debt in a neoclassical growth model" 55 (55): 1126-1150, 1965

10 Choi, S., "Measurement of economies of scale in Korean banking industry : A new approach" Finance and Economic Research Institute, Bank of Korea 1-24, 1997

11 Hwang, S., "Interest rate risk, bank profitability, financial stability and financial consumer welfare" KDI 1-158, 2019

12 Smith, B. D., "Interest on reserves and sunspot equilibria : Friedman’s proposal reconsidered" 58 (58): 93-105, 1991

13 Boar, C., "Impending arrival-a sequel to the survey on central bank digital currency" BIS 2020

14 Chung, U., "Economies of scale and scope in Korea’s banking industry : Evidence from the Fourier flexible form" 2 (2): 87-111, 2001

15 Stevens, A., "Digital currencies: Threats and opportunities for monetary policy" 79-92, 2017

16 Dyson, B., "Digital cash:Why central banks should start issuing electronic money"

17 Keeley, M. C., "Deposit insurance, risk, and market power in banking" 80 (80): 1183-1200, 1990

18 Williamson, S., "Central bank digital currency:Welfare and policy implications" 2022

19 Kwon, O., "Central bank digital currency, tax evasion, and inflation tax" 2022

20 Bordo, M. D., "Central bank digital currency and the future of monetary policy" National Bureau of Economic Research 2017

21 Davoodalhosseini, S. M., "Central bank digital currency and monetary policy" 104150-, 2022

22 Bank of Korea, "Central bank digital currency" Bank of Korea Publishing 2019

23 Meaning, J., "Broadening narrow money : Monetary policy with a central bank digital currency" 17 (17): 5-46, 2021

24 Bitter, L., "Banking crises under a central bank digital currency (CBDC)" Gender Economics, ZBW - Leibniz Information Centre for Economics 2020

25 Xu, T. T., "Bank profitability and financial stability" IMF 4-32, 2019

26 Berger, A. N., "Bank competition and financial stability" 35 (35): 99-118, 2009

27 Andolfatto, D., "Assessing the impact of central bank digital currency on private banks" 131 (131): 525-540, 2021

28 Kim, D., "Are suspicious activity reporting requirements for cryptocurrency exchanges effective?" 7 (7): 2021

29 Klein, M. A., "A theory of the banking firm" 3 (3): 205-218, 1971

30 Kim, I., "A study on economics of the scale and scope of the Korean banking industry" 5 (5): 37-88, 1991

31 Friedman, M., "A program for monetary stability" Fordham University Press 1960