Discover Bank CD Rates for 1 Year Jumbo certificate of deposits are now at 2.27 percent with an APY of 2.30 percent. 1 Year Jumbo CD Rates at Discover Bank were changed from 2.37 percent with a yield of 2.40 percent. Compare Discover Bank CD Rates for 1 Year Jumbo certificates of deposit with other CD rates. (continued below)