This document discusses the concept of leverage in corporate finance. It defines leverage as using fixed costs or funds to increase shareholder returns. There are three types of leverage: operating, financial, and combined. Operating leverage refers to using fixed operating costs to magnify the impact of sales changes on earnings. Financial leverage magnifies the impact of changes in earnings before interest and taxes (EBIT) on earnings per share through the use of debt financing. Combined leverage results from using both operating and financial leverage, further amplifying the effect of sales changes on earnings per share. The degree of leverage depends on the fixed and variable costs for a company.