A Macroprudential Stable Funding Requirement and Monetary Policy in a Small Open Economy

The Basel III net stable funding requirement, scheduled for adoption in 2018, requires banks to use a minimum share of long-term wholesale funding and deposits to fund their assets. This paper introduces a stable funding requirement (SFR) into a small open economy DSGE model featuring a banking sector with richly-specified liabilities. We estimate the model for New Zealand, where a similar requirement was adopted in 2010, and evaluate the implications of an SFR for monetary policy trade-offs. Altering the steady-state SFR does not materially affect the transmission of most structural shocks to the real economy and hence has little effect on the optimised monetary policy rules. However, a higher steady-state SFR level amplifes the effects of bank funding shocks, adding to macroeconomic volatility and worsening monetary policy trade-offs conditional on these shocks. We find that this volatility can be moderated if optimal monetary or prudential policy responds to credit growth.