The Graham Number of Spero Therapeutics Inc (SPRO) is 1.89.
Graham Number estimates the fair value of a stock using both earnings and book value per share. It is commonly used by value investors to identify undervalued stocks.
| Date | Value |
|---|---|
| 2025-12-31 | 1.89 |
| 2024-12-31 | 4.16 |