Debt-to-Equity Ratio.
A definition, in plain English — with the books that teach it.
What it means
The debt-to-equity ratio (D/E) compares a company's total debt to shareholders' equity, revealing how much of the business is financed by creditors versus owners. A higher ratio signals greater financial leverage and interest obligations, which amplifies both returns and risk. Capital-intensive industries like utilities and manufacturing typically carry higher D/E ratios than asset-light software companies. Lenders often set maximum D/E thresholds in loan covenants, and equity investors monitor it as a proxy for financial stability.
Example
A construction company carries $8 million in total debt and $5 million in equity, giving a D/E ratio of 1.6. A software peer with $1 million in debt and $10 million in equity has a D/E of 0.1. In a downturn, the construction firm's fixed interest payments amplify losses, while the software firm's balance sheet absorbs the shock more easily.
