Secured Overnight Financing Rate (SOFR) is a secured interbank overnight interest rate and reference rate established as an alternative to LIBOR, which is published in a number of currencies and underpins financial contracts all over the world. Because LIBOR is derived from banks' daily quotes of borrowing costs, banks were able to manipulate the rates through lying in the surveys. Deeming it prone to manipulation, UK regulators decided to discontinue LIBOR.