Answer: Currently, most variable rate debt utilized by nontraded REITs have interest rates based upon LIBOR, the London Interbank Offered Rate. In April 2018, the New York Federal Reserve began publishing the Secured Overnight Financing Rate (SOFR), a rate that regulators hope will eventually be adopted to back U.S. dollar-based derivatives and loans. The head of Britain’s financial markets regulator said last year that a LIBOR substitute must be in place for banks to use by the end of 2021 and that LIBOR must because there are not enough transactions underpinning the rates.