The Graham Number of Spero Therapeutics, Inc. (SPRO) is 1.83.
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 | 1.83 |
| 2024-12-31 | 4.02 |