This paper measures the full extent of downward stickiness in credit card interest rates by testing for the amount and adjustment asymmetries. We found that lenders behave asymmetrically in response to changes in the Reserve Bank of Australia's (RBA) cash rate. The RBA's rate rises are passed on to borrowers much faster than rate cuts and the aggregate credit card interest rate showed a very resilient degree of downward rigidity. Overall, based on the estimated short-run dynamic model, banks immediately pass on 112% of any RBA's rate rises, but only 53.7% of any rate cut. In other words, the short-run effects of rate cuts were not only less than half of the rate rises but also were delayed on average by two months. As far as changes in the credit card interest rate are concerned, an expansionary monetary policy is thus less effective than a contractionary policy.