(13)Given the nature of the activities of CSDs, a CSD assumes business risk due to potential changes in general business conditions that are likely to impair its financial position following a decline in its revenues or an increase in its expenses and that result in a loss that should be charged against its capital. Given that the level of business risk is highly dependent on the individual situation of each CSD and it can be caused by various factors, the capital requirements of this Regulation should be based on a CSD's own estimate and the methodology used by a CSD for such an estimate should be proportional to the scale and complexity of the CSD's activities. A CSD should develop its own estimate of the capital required against business risk under a set of stress scenarios in order to cover the risks that are not already captured by the methodology used for operational risk. In order to ensure a prudent level of the capital requirements for business risk when making a calculation based on self-designed scenarios, a minimum level of capital, should be introduced in the form of a prudential floor. The minimum level of required capital for business risk should be aligned to similar requirements for other market infrastructures in related Union Acts such as Commission Delegated Regulation on capital requirements for central counterparties (‘CCPs’).