Source: Board of Governors of the Federal Reserve System (US)
Release: H.15 Selected Interest Rates
Rate posted by a majority of top 25 (by assets in domestic offices) insured U.S.-chartered commercial banks. Prime is one of several base rates used by banks to price short-term business loans.
Board of Governors of the Federal Reserve System (US), Bank Prime Loan Rate [DPRIME], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/DPRIME, March 28, 2023.