• Singapore Telecommunications average return on investment for 2019 was 5.65, a 49.87% decline from 2018.
• Singapore Telecommunications average return on investment for 2018 was 11.27, a 13.44% decline from 2017.
• Singapore Telecommunications average return on investment for 2017 was 13.02, a 15.63% decline from 2016.

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.