Thanachart Bank (TBank) aims for second-half deposits to increase by 5% from the end of June as it mobilises funds to lock in low financial costs and expands the customer base despite sluggish loan demand.The bank hopes to increase its current and savings account (CASA) ratio to 50% by the end of the year from 47% now as a means of raising deposits, said executive vice-president Teranuj Koomsap. Unlike fixed-deposit accounts, CASA accounts carry lower costs because banks pay no interest for current accounts.