Question: Commercial Paper Rates. What were the highest and lowest historical interest rates for commercial paper? Go to www.stlouisfed.org, find the "FRED® data" link, then the "Interest Rates" link. What were the highest and lowest interest rates for one-, two-, and three-month AA nonfinancial commercial paper? What about for financial commercial paper? Did these occur at the same time? Why might the nonfinancial and financial commercial paper rates be different?