In the brokerage business, soft dollars have been in use for many years. Prior to May 1, 1975—sometimes referred to as "May Day"—all brokerage firms used a fixed price commission schedule published by the New York Stock Exchange; the schedule was a matrix listing the number of shares in the trade on one axis, the stock's price per share on the other axis, and the corresponding commission charge in the cells of the matrix. Because broker/dealers traditionally were required to charge a fixed commission and could not compete by lowering the commission for a trade, they soon began to compete by providing additional services to their institutional clients. In the industry this became known as "bundling" services with commissions.