The operating expense ratio states how much of the premiums was used to acquire and administer business. This ratio is calculatedÂ grossÂ andÂ net Â for insurance enterprises.

A calculation indicating how much of the gross income must be earmarked for operating expenses. This ratio is the total operating expense for a period divided by the total effective gross income for that same period. For more information, see the "Real Estate Investment Analysis Tools" article in the "Real Estate Investing" section.

The proportion of a mutual fund's average net assets required to pay annual expenses (operating expenses, management fees, etc.).

The ratio of total operating expenses to effective gross income.

A fund's annual expenses (operating expenses, management fees, and 12b-1 fees, if any) expressed as a percentage of a fund's average net assets. The total return data provided reflects peformance after operating expenses are deducted.

Mathematical equation obtained by dividing operating expenses by gross income.