We have a decreased rate alert on 4 year CD rates at Synchrony Bank. The new Synchrony Bank 4 year CD rate is 1.63 percent with a yield of 1.65 percent. The old 4 year CD rate at Synchrony Bank was 1.73 percent with a yield of 1.75 percent. View a history of rate changes to the 48 month certificate of deposit at Synchrony Bank by visiting Synchrony Bank 4 Year CD Rates.