Source: Bank of England
Release: SONIA Interest Rate Benchmark
The Sterling Overnight Index Average (SONIA) is the interest rate applied to bank transactions in the British Sterling Market during off hours.
For more information, please visit the Bank of England's explication on the key features and policies of SONIA.
Bank of England, SONIA Compounded Index [IUDZOS2], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/IUDZOS2, October 17, 2021.