Daily Sterling Overnight Index Average (SONIA) Rate: 90th percentile

The Sterling Overnight Index Average (SONIA) is the interest rate applied to bank transactions in the British Sterling Market during off hours. This series represents the SONIA rate occurring at the 90th percentile of volume. For more information, please visit the Bank of England's explication on the key features and policies of SONIA. (https://www.bankofengland.co.uk/statistics/details/further-details-about-wholesale-interbank-sterling-market-data/)