A fallback spread is the fixed adjustment added to a compounded overnight rate when it replaces an interbank offered rate in an existing contract, to compensate for the credit and term premium the old rate contained. For LIBOR it was set as the five-year median of the difference between the two rates, fixed on 5 March 2021: for dollar LIBOR against SOFR, 11.448 basis points at one month, 26.161 at three months and 42.826 at six months.
Quantitative Finance · शब्दावली