Risk Adjusted Deposit Insurance for Japanese Banks
Ryuzo Sato, Rama V. Ramachandran, Bohyong Kang
NBER Working Paper No. 3314
The purpose of this paper is to evaluate the Japanese deposit insurance scheme by contrasting the flat insurance rate with a market-determined risk-adjusted rate. The model used to calculate the risk-adjusted rate is that of Ronn and Verrna (1986) . It utilizes the notion of Merton(1977) that the deposit insurance can be based on a one-to-one relation between it and the put option; this permits the application of Black and Scholes(1973) model for the calculation of the insurance rate. The risk adjusted premiums are calculated for the thirteen city banks and twenty-two regional banks. The inter-bank spread in risk-adjusted rates in Japan is found to be as wide as in the United States. But the insurance system is only one component of the safety network for a county's banking system. The difference in the American and Japanese networks is described and its implications for the evaluation of the insurance system is discussed.
Published: Sato, Ryuzo (ed.) The selected essays of Ryuzo Sato. Volume 2. Production, stability and dynamic symmetry, Economists of the Twentieth Century series. Cheltenham, U.K. and Northampton, MA: Elgar, 1999.