U.S. public companies with “low” leverage have an interest-bearing net debt-to-equity ratio of 0 percent or less, firms with “medium” leverage have a ratio between 1 and 62 percent, and “high” leverage firms have a ratio of 63 percent or more. Given these data, how would you classify the following firms in terms of their optimal debt-to-equity ratio (high, medium, or low)?
• a successful pharmaceutical company
• an electric utility
• a manufacturer of consumer durables
• a commercial bank
• a start-up software company