The American Interbank Offered Rate (AMERIBOR), or simply Ameribor, is a reference rate for corporate borrowing costs for periods between 30 and 270 days.
[1][2][3] It is based on short-term funding data from the Depository Trust & Clearing Corporation.
[1] Introduced by Richard Sandor, who is known for creating interest-rate futures in the 1970s, Ameribor is determined on the American Financial Exchange.
[1][4] This is a platform where banks lend through mutual credit lines.
[1] Ameribor is favored by smaller banks as it accurately represents the fund trading costs for banks outside the Federal Reserve's primary dealers.