• Biogen average return on investment for 2023 was 10.6, a 18.96% decline from 2022.
• Biogen average return on investment for 2022 was 13.08, a 17.52% decline from 2021.
• Biogen average return on investment for 2021 was 11.13, a 61.67% 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.