In general, whenever there is a situation where mixed valuation occurs, details are provided by the NCB at the attribute level according to the attributes in Annex IV. (a) Price valuation Stocks and flows of quoted shares must be reported at market value; stocks and flows of debt securities at nominal value. ###>Dans les cas où l'ampleur du phénomène est importante, la valeur «Z» («non spécifiée») est utilisée.