The Whole Markets Brokers’ Association (WMBA) has published a market notice announcing changes to its benchmark methodology for the Sterling Overnight Index Average (SONIA) and Repurchase Overnight Index Average (RONIA) benchmarks. This is intended to provide further clarity under which circumstances WMBA would publish recalculations. The changes will take effect on 20 June 2016.

View Changes to WMBA calculation methodology for SONIA & RONIA, 27 January 2016