Historical Data: South African Benchmark Overnight Rate (SABOR) and Overnight Foreign Exchange (FX) Rate. The attached document contains the overnight benchmark rates, as published by the South African Reserve Bank, updated at the end of each month. Please note that there is generally no overnight foreign exchange data on public holidays in the US. Any enquiries can be directed to FMD Interest rate team at FMD-InterestRate@resbank.co.za or on +27 12 313-495