As of 2025-09-17, the Fair Value of Spero Therapeutics Inc (SPRO) is -4.76 USD. This value is based on the Peter Lynch's Fair Value formula. With the current market price of 1.90 USD, the upside of Spero Therapeutics Inc is -350.63%.
With the market price of 1.90 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 350.63%.
Note: valuation result may not be accurate due to the company's negative EPS.
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 | ||||||
| 2020-12-31 | 2021-12-31 | 2022-12-31 | 2023-12-31 | 2024-12-31 | 5Y Avg | |
| Net income | -78.28 | -89.76 | -46.42 | 22.81 | -68.57 | -52.04 |
| YoY growth | -28.48% | -14.67% | 48.28% | 149.13% | -400.65% | -49.28% |
| Market Cap (mil) | 106.93 |
| P/E | |
| Forward P/E |
| EPS | -0.95 |
| Avg earnings growth rate | -49.28% |
| TTM earnings | -53.60 |