As of 2026-09-17, the Fair Value of Spero Therapeutics Inc (SPRO) is 0.64 USD. This value is based on the Peter Lynch's Fair Value formula. With the current market price of 1.11 USD, the upside of Spero Therapeutics Inc is -42.56%.
With the market price of 1.11 USD and our fair value calculation, Spero Therapeutics Inc (SPRO) is not a good investment. Investing in SPRO stocks now will result in a potential loss of 42.56%.
Peter Lynch's formula is:
The earnings growth rate we use in the formula is the average growth rate of net income/earnings over the last 5 years. If the average growth rate is smaller than 5%, we set it to 5%. If it is larger than 25%, we set it to 25%. If the TTM EPS is negative, Peter Lynch Fair Value's result can be unreliable.
| Historical Earnings | ||||||
| 2021-12-31 | 2022-12-31 | 2023-12-31 | 2024-12-31 | 2025-12-31 | 5Y Avg | |
| Net income | -89.76 | -46.42 | 22.81 | -68.57 | 8.57 | -34.67 |
| YoY growth | -14.67% | 48.28% | 149.13% | -400.65% | 112.50% | -21.08% |
| Market Cap (mil) | 64.27 |
| P/E | 8.70x |
| Forward P/E | 815.96x |
| EPS | 0.13 |
| Avg earnings growth rate | -21.08% |
| TTM earnings | 7.38 |