SONIA
Sterling Overnight Index Average.
Tracks actual average market sterling funding rates each day:
- for settlement that day
- where repayment is made on the following business day.
It is published by WMBA Ltd (part of the European Venues and Intermediaries Association - EVIA) in London at 5pm each day.
It is defined and calculated as the weighted average rate (to four decimal places) of all unsecured sterling overnight cash transactions brokered in London by EVIA member firms between midnight and 4.15pm London time with all counterparties in a minimum deal size of £25 million.
The Bank of England will become the administrator of a revised SONIA with effect from 23 April 2018.
Among other changes, SONIA will be broadened to include overnight unsecured transactions negotiated bilaterally, as well as those arranged via brokers.
See also
- Benchmark
- Euro Overnight Index Average
- EURONIA
- European Venues and Intermediaries Association
- LIBOR
- Over night index average rate
- Overnight indexed swap
- SARON
- Sterling overnight index average
- TONAR
