A (hypothetical) method of banking in which banks keep 0 percent of their deposits in the form of bank reserves, meaning that ALL deposits are used for interest-paying loans. No-reserve banking is one of two theoretical alternatives designed to help illustrate a contrast to the fractional-reserve banking actually practiced by modern banks. The other alternative is full-reserve banking. With the no-reserve approach a bank operates as financial intermediary or broker, matching up borrowers and lenders.