(4)Under Delegated Regulation (EU) No 528/2014 the simplified approach should only be available for institutions that exclusively purchase options and warrants, but they should not be obliged to use that approach. It is, therefore, appropriate to correct the wording of Article 2 of Delegated Regulation (EU) No 528/2014 which obliges those institutions to use the simplified approach and does not prevent other institutions from using that approach as well.