Nos prime rate vs libor
London Inter-Bank Offering Rates (LIBOR) Bank Prime Loan (Prime Rate) Movements in the index on which your ARM is based determine whether your rate increases or drops when it resets. The To estimate a 30-year rate during that time frame, this series includes the Treasury 20-year Constant Maturity rate and an "adjustment factor," which may be added to the 20-year rate to estimate a 30-year rate during the period of time in which Treasury did not sell 30-year bonds. Detailed information is provided with the data.