What Is SOFR? The Secured Overnight Financing Rate Explained
Published · Updated
SOFR, the Secured Overnight Financing Rate, is the overnight cost of borrowing cash when Treasury securities are pledged as collateral, published each business day by the New York Fed.
What SOFR measures
SOFR is built from actual transactions in the market for overnight repurchase agreements, called repos. In a repo one party borrows cash and hands over Treasury securities as collateral, then buys the securities back the next day at a slightly higher price. SOFR summarizes the rate on those trades. The New York Fed publishes it in the morning for the previous business day.
SOFR compared with the fed funds rate
The fed funds rate covers unsecured loans between banks. SOFR covers loans backed by Treasury collateral and includes a wider group of lenders and borrowers. The two usually sit close together because both are overnight rates tied to the Fed's policy range, but they measure different markets and can part ways when funding conditions change.
Why SOFR is used for loans and contracts
SOFR replaced LIBOR as the main benchmark for many adjustable-rate loans, bonds and derivatives in the United States. Because it is based on real trades and not on bank estimates, it is harder to manipulate. The New York Fed also publishes SOFR averages and an index so contracts can use a rate measured over a longer period.
This paper prints the stored values as published and does not average them itself.