Our findings suggest that the banks experienced productivity growth in two contiguous periods and declines in two other contiguous periods, one of which coincided with the global financial crisis. For example in 2007-08, there was a total productivity growth of +0.8 percent after two years of declines. The average decline is -2.2 percent during the test period. However, compared to scores reported for crisis periods in several countries including this country in prior studies for periods before 2002, this period registered productivity change very close to the borderline of efficiency at 1.00. The actual number is 0.978, which suggests the period average decline of -2.2 percent. This decline is mainly driven by negative shifts of the technical frontier in two periods, although there is a slight improvement in managerial efficiency over the entire period by 0.8 per cent. We explain that this is due to the lack of capital to obtain newer technology because, during this period up about 2006, inflation was high so interest cost was higher and foreign investments declined.