| Last year was boom time for bankers. A surging economy and binging borrowers boosted the results of financial giants. Big gains in credit-card business helped Providian Financial Corp., No.6, increase net income by 18% in the past year. After a string of acquisitions, FleetBoston Financial Corp., No.15, reaped the benefits of merger efficiencies to help it return 57.5% to shareholders. Alas, loan growth is slowing, and problem loans are mounting as the economy sputters. Next year, banks may well long for the days of double-digit growth. |  |