The Wholesale Markets Brokers' Association (WMBA) has announced changes to its benchmark methodology for SONIA and Repurchase Overnight Index Average (RONIA) benchmarks. The changes will take effect on 20 June 2016. The changes relate to the Bank of England’s decision to extend the settlement day for CHAPS and CREST by one hour and forty minutes to 18.00pm, from 20 June 2016. To ensure both a comprehensive inclusion of trades and to eliminate any possibility that transactions could be deferred until the closure of the window, WMBA will adhere to the 18.00 cut-off point for the purposes of calculating SONIA and RONIA.