. commercial paper debt generally has a maturity of between 1 and 90 days , although it can have a maturity of up to 365 days , and bears interest at rates agreed to at the time of the borrowing . the interest rate is generally based on a standard index such as the federal funds rate , libor , or the money market rate as found in the commercial paper market . as of december 31 , 2012 , devon 2019s weighted average borrowing rate on its commercial paper borrowings was 0.37 percent