For mutual funds, a measure of trading activity during the previous year, expressed as a percentage of the average total assets of the fund. A turnover rate of 25% means that the value of trades represented one-fourth of the assets of the fund. For finance, the number of times a given asset, such as inventory, is replaced during the accounting period, usually a year. For corporate finance, the ratio of annual sales to net worth, representing the extent to which a company can grow without outside capital. For markets, the volume of shares traded as a percent of total shares listed during a specified period, usually a day or a year. For Great Britain, total revenue. Percentage of the total number of shares outstanding of an issue that trades during any given period.