Central bank capital management

Abstract

This paper offers general guidelines for central bank capital management. Capital adequacy is important to be a credible, independent monetary authority over a medium-term horizon. Central banks, however, face several challenges in determining their capital adequacy. Firstly, the amount of capital only plays an auxiliary role in central banks' effectiveness given that they cannot default as long as they have the right to issue legal tender. Secondly, central banks face two types of financial risks: calculable risks from current exposures and latent risks from future exposures. These latent risks, in particular, are difficult to quantify because they stem from contingent policy measures such as quantitative easing and lending of last resort. It is argued that a central bank's target level of capital (1) can be calibrated with a confidence level that is lower than that used for commercial banks and (2) takes latent risks into account that are related to GDP or the size of the financial sector in the economy.