SOFR
Secured Overnight Financing Rate, the primary U.S. replacement for LIBOR, based on overnight Treasury repo transactions.
SOFR (Secured Overnight Financing Rate) is the primary U.S. dollar benchmark interest rate that replaced LIBOR for dollar-denominated financial products. Published daily by the Federal Reserve Bank of New York, SOFR is calculated as a volume-weighted median of overnight repo transactions secured by U.S. Treasury securities in the tri-party, bilateral, and GCF (General Collateral Finance) repo markets.
Because SOFR is based on approximately $1 trillion of daily actual transactions in the U.S. Treasury repo market, it is far more transaction-grounded than LIBOR was. Its collateralized nature means it reflects near-risk-free borrowing rates, whereas LIBOR included a bank credit risk premium.
SOFR is published in several forms: daily overnight rate (the base), 30-day compounded average, 90-day compounded average, 180-day compounded average, and daily index. CME Group publishes forward-looking Term SOFR rates (1-month, 3-month, 6-month, 12-month) derived from SOFR futures markets, which are used in syndicated loans and floating-rate notes because they are known at the beginning of an interest period like LIBOR was.
The transition to SOFR required developing spread adjustments (approximately 11 basis points for 1-month, 26 basis points for 3-month) to account for the difference between credit-risk-inclusive LIBOR and credit-risk-free SOFR when converting legacy contracts.
SOFR is now the standard floating rate in U.S. syndicated loans, floating rate notes, interest rate swaps, securitizations, and commercial real estate loans. Understanding SOFR mechanics is essential for CFOs, treasury teams, and financial analysts working with floating-rate instruments.
FAQs
What is the difference between overnight SOFR and Term SOFR?
Overnight SOFR is published daily based on the prior day's repo transactions and is a backward-looking rate—you know it only after the period it applies to. Term SOFR rates (1-month, 3-month) are forward-looking rates derived from SOFR futures markets, published by CME Group. Term SOFR is known at the beginning of an interest period (like LIBOR was), making it easier to calculate interest payments in advance and more familiar for loan documentation. Overnight SOFR compounded in arrears is more technically pure but operationally more complex. Most U.S. corporate loans and CLOs use Term SOFR for operational simplicity.
Why is SOFR considered more reliable than LIBOR?
SOFR is more reliable than LIBOR because it is based on actual transactions rather than bank estimates. Over $1 trillion of Treasury repo transactions underlie each day's SOFR calculation, making manipulation virtually impossible—there are too many independent transactions for any single actor to distort the rate. LIBOR, based on bank submissions about hypothetical borrowing costs, was manipulable because banks could easily submit slightly incorrect estimates. The transaction-grounded nature of SOFR directly addresses the fundamental weakness that the LIBOR scandal exposed.
How do CFOs manage floating-rate risk in a SOFR environment?
CFOs manage SOFR floating-rate risk through interest rate swaps (exchanging floating SOFR payments for fixed), interest rate caps (limiting maximum SOFR exposure), and collar structures (capping SOFR exposure while also participating in rate decreases to a floor). Cash flow hedging with these instruments qualifies for hedge accounting under ASC 815 if properly documented, reducing earnings volatility. Treasury policies typically specify maximum floating-rate exposure as a percentage of total debt, with interest rate derivatives used to bring floating-rate exposure within policy limits. Sensitivity analysis showing earnings impact at SOFR +100bps and +200bps is standard board reporting.
Related Terms
LIBOR
London Interbank Offered Rate, the formerly dominant global benchmark for short-term interbank lending, now discontinued.
Federal Funds Rate
Interest rate at which banks lend reserves to each other overnight, set by the Federal Reserve.
Prime Rate
Benchmark lending rate charged by banks to their most creditworthy customers, tracking the federal funds rate.
Revolving Credit Facility
Flexible bank credit line allowing repeated borrowing and repayment up to an approved limit.
