We have a lower rate alert on 5 year jumbo IRA CD rates at Discover Bank. The new 5 year jumbo IRA CD rate at Discover Bank has been lowered to 1.98 percent with a yield of 2.00 percent. Discover Bank 5 year jumbo IRA CD rates were lowered from 2.18 percent with a yield of 2.20 percent. View a history of jumbo IRA rate changes to the 60 month Discover Bank certificate of deposit at Discover Bank 5 Year Jumbo IRA CD Rates.