This analysis examined optimum supply formula (OSF) in the tart cherry industry. The OSF is a tool for stabilizing market prices as authorized by a federal market order (FMO). The current OSF sets free sales of tart cherries in a given harvest year, or optimum supply volume (OSV), equal to the average sales of the three prior years plus 10 percent. This report evaluates the current OSF relative to several alternative formulations. The analysis reviews data to identify sources of market stability, analyzes the demands for tart cherries and compares the current OSF with the alternatives.