The amount that results in a period from interest and similar income or expenses from interest rate deals is displayed for individual profit centres. Interest-related income is e.g. premium/discount payments or premiums. Besides interest rate deals, the net interest income can also be calculated for other deal types such as currency swaps (swap profit). In this case, calculation is performed at individual deal level using different ratios which are then displayed in a compact form for each profit centre. The values are displayed according to a freely definable period grouping for the current financial year.