This paper considers the obsolescence of commercial banking from the p
erspective of economic history. As a result of the enormous growth in
money markets, it is now possible to operate a payments system in whic
h liabilities payable on demand are backed by a diversified portfolio
of liquid securities. Such a payments system, sometimes known as ''mut
ual fund banking,'' is theoretically preferable to traditional commerc
ial banking because it is not subject to the risk of runs or panics. T
he advantages of mutual fund banking are now being demonstrated in the
US marketplace, with the impressive growth of money market mutual fun
ds with checking privileges.