(10)In 2017, the BCBS revised the calculation of the leverage ratio exposure value of regular-way purchases and sales awaiting settlement in order to ensure that the treatment properly reflects the inherent leverage associated with those trades and that possible accounting differences do not affect the calculation among institutions with comparable positions. In the Union, the revision was introduced by Regulation (EU) 2019/876. However, that more favourable treatment only becomes applicable on 28 June 2021. Therefore, given that the revised calculation would reflect the actual leverage of a transaction more appropriately and, at the same time, would increase the capacity of an institution to lend and to absorb losses amid the COVID-19 pandemic, institutions should already have the possibility to temporarily apply the revised calculation before the provision introduced by Regulation (EU) 2019/876 becomes applicable to all institutions in the Union.