Banks are likely to face further cost pressures from higher expenses, driven by surging inflation and planned business investments. CIBC also hopes to get an additional boost from its acquisition of the Canadian Costco credit card portfolio, which is expected to close early next year. The six top banks, which reported their fourth-quarter results last week, posted mortgage growth of 11% in Canada in the period from a year ago, with the pace accelerating in each of the past several quarters.