(9)Whereas the reduction of systemic risk requires in particular the finality of settlement and the enforceability of collateral security; whereas collateral security is meant to comprise all means provided by a participant to the other participants in the payment and/or securities settlement systems to secure rights and obligations in connection with that system, including repurchase agreements, statutory liens and fiduciary transfers; whereas regulation in national law of the kind of collateral security which can be used should not be affected by the definition of collateral security in this Directive;