The Impact of Return on Collateral in a Channel System

We empirically investigate the relationship between the return on collateral and monetary policy implementation in the channel system. Recent developments in monetary theory suggest that the return on government assets which measures the opportunity cost of holding collateral should have negative impacts on the interest-rate spread and the interbank market rate. The central bank should set a higher spread when the return on collateral is below a cutoff but implements a lower spread when the return on collateral is higher than the cutoff. The interbank market rate tends to lie above the policy target rate when the return on collateral is low and vice versa. We use data from Eurozone area and six industrialized countries to test these theoretical implications. We propose two econometric models: one is more structural and closely related to the monetary model to test the negative relationships, and the other is based on the threshold autoregression model to detect the potential cutoffs. Our findings provide conditional support for the negative impact of return on collateral