http://videotap.wistia.com/medias/h8ina3eyzq?embedType=async&videoFoam=true&videoWidth=640 The Prime Lending Rate - sometimes just called “Prime” - is the interest rate that banks charge each other for overnight loans. Some consumer rates - like ARMs - are set in relation to Prime. In the US, Prime is affected by the Federal Reserve lending rate to banks; historically,...