German to English Bus/Financial Finance (general) Capital adequacy rules

This term appears in the annual report of a German bank. Here is the sentence:
Hierbei erfolgt quartalsweise ein Abgleich zwischen der Ausnutzung dieser risikoartenbezogenen Gesamtlimite (Risikokapital) und den zur Unterlegung der Risiken verfügbaren Risikodeckungsmasse.
My problem is this. It seems obvious to me that the Risikodeckungsmasse is what we normally call bank capital (core capital and/or supplementary capital or whatever), in other words the capital they have available to cover any losses. So I would like to call it risk coverage capital (to preserve a somewhat literal style). But what then to do with the Risikokapital? Actually, I would love to hear your input on both these words Risikodeckungsmasse and Risikokapital. Many thanks!