If an observation shift is being used daily SONIA rates are weighted according to when the days from which they are taken fall in the observation period. If an observation shift is not being used, the daily SONIA rates are taken from the observation period but weighted according to when the days upon which they [...]

The SONIA Oversight Committee reviews and provides challenge on all aspects of the benchmark determination process and provides scrutiny of the administration of SONIA. As the sole input to the SONIA Compounded Index is the published SONIA rate, the SONIA Compounded Index does not require a contingency calculation methodology. The Sterling Overnight Index Average (SONIA) [...]