The 4 year jumbo CD rate at Synchrony Bank has been lowered to 1.63 percent with a yield of 1.65 percent. Synchrony Bank 4 year jumbo CD rates were higher at 1.73 percent with a yield of 1.75 percent. View a history of rate changes to this 48 month jumbo certificate of deposit at Synchrony Bank by going to Synchrony Bank 4 Year Jumbo CD Account.