The National Australia Bank has lifted its mortgage interest rates again, independent of any move by the Reserve Bank of Australia (RBA). This is the NAB?s third rate rise in less than seven weeks.

It gives the bank a standard variable rate of 9.36%, compared with Westpac?s 9.27%. ANZ and St George, however, have the highest rates at 9.37%. This compares with the RBA?s official cash rate of 7.25%.