Financial positions are valued at historic cost. Credit institutions are required to make adequate general or specific provisions against credit, interest rate, exchange rate, investment, country and other risks. Provisioning is based on prescribed ratios with different limits for the 5 categories. In principle, increasing risk requires higher provisioning. Credit institutions should form additional general provisions against risks that cannot be predicted or predetermined.
Monthly revaluation is compulsory but credit institutions can revalue on a more frequent basis.
The statement of accounts is prepared by the NBH's Accounting Department on a daily basis, and is available at the end of the business day. The balance sheet data are restructured for statistical purposes by the Statistics Department. A uniform reporting scheme is used by all credit institutions. No estimated or adjusted data are included in the 'final' version of the Banking Survey. The external positions in the Banking Survey are crosschecked with BOP data.