• Merck average return on investment for 2023 was 7.15, a 67.46% increase from 2022.
• Merck average return on investment for 2022 was 21.97, a 49.05% decline from 2021.
• Merck average return on investment for 2021 was 14.74, a 23.94% increase from 2020.

Roi - return on investment can be defined as an indicator of how profitable a company is relative to its assets invested by shareholders and long-term bond holders. Calculated by dividing a company's operating earnings by its long-term debt and shareholders equity.