• Costco average debt/equity ratio for 2023 was 0.25, a 21.88% decline from 2022.
• Costco average debt/equity ratio for 2022 was 0.32, a 21.95% decline from 2021.
• Costco average debt/equity ratio for 2021 was 0.41, a 0% decline from 2020.

Debt/equity ratio can be defined as a measure of a company's financial leverage calculated by dividing its long-term debt by stockholders' equity.