It's a very stable index with about a one - month lag due to it's price being based on the prior months total annual average of interest on deposit accounts. (thetruthaboutmortgage.com)
People were quick to point out that interest rates on deposits at credit unions were usually much higher than at banks and interest rates on loans were generally lower. (getrichslowly.org)
Interest is paid on deposits in both instances however money market accounts. (stockmonkeys.com)