The invention relates to a software implemented tool for assisting central banks in handling the provision of central bank credits to borrowing credit institutions, fully collateralised with eligible securities and/or credit claims certified as equivalent / mutually acceptable / mutually accepted according to established common rules, comprising - at least one means for Straight-Through treatment of credit and collateral transactions by a real-time global pool positioning mechanism for each borrowing party, with a synchronic link to a Real-time Gross Settlement (RTGS) infrastructure, - at least one means for assigning parameters for each central bank concerning a collateral framework according to said common rules, modifiable by a managing instance in accordance with said common rules, and - at least one central database of eligible securities which is shared among the central banks, with at least one means for recording into said database all data necessary to uniformly valuate said securities according to a source oriented hierarchy and at least one means for hierarchal cascading of valuation prices so that each collateralised security has the same value for each central bank.
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