存款保险制度促使中国商业银行利差缩窄吗

Does the Deposit Insurance System Lead to a Reduction of the Cost of Carry for Chinese Commercial Banks?

在利差决定模型基础上,使用中国63家商业银行2010～2016年的面板数据研究存款保险制度对商业银行利差的影响。研究结果表明,存款保险制度使得商业银行利差缩窄,无论是大型国有银行、股份制银行还是地方性银行,存款保险制度对其利差均有显著的负向影响;进一步研究发现,风险规避程度、运营成本对商业银行的利差有显著正向影响,而非利息收入占比、成本收入比和GDP增速都对商业银行利差有显著负向影响。建议商业银行大力发展中间业务,提高非利息收入占比,开展金融创新,促进产品和业务升级,减少对存贷款利息收入的依赖,从而降低由存款保险制度导致的利差缩窄对其盈利能力的影响。

Based on the cost of carry determination model,2010-2016 panel data from 63 Chinese commercial banks are used to study the impact of the deposit insurance system on the cost of carry of commercial banks.The results of the study show that the deposit insurance system reduces the cost of carry of commercial banks.For large state-owned banks,joint-stock banks,and local banks,the deposit insurance system has a significant negative impact on the cost of carry.Further,the study found that the degree of risk avoidance and operating costs have a significant positive impact on the cost of carry of commercial banks.In addition,the non-interest income ratio,cost-to-income ratio,and GDP growth rate have a significant negative impact on commercial bank carrying costs.As a means of reducing the effect of the cost of carry on profitability caused by the deposit insurance system,we suggest that commercial banks strongly develop intermediary businesses,increase their non-interest income ratios,execute financial innovation,encourage product and business upgrades,and reduce dependence on deposit and loan interest income.